Spinach
Spinach is a vegetable in the Amaranthaceae family. It grows best in full sun to part shade with medium moisture, and is listed for USDA zones 2-13. Plants reach harvest about 25–69 days after planting and sit about 4 inches apart.
Varieties
22 from True Leaf Market, High Mowing & Seeds Now · sorted by days to maturity▸Lakeside - Hybrid25–60 days
Container; Vegetable; Annual
Spinach Seeds - Lakeside - Hybrid. Non-GMO. Spinacea oleracea. 25-30 days maturity for baby leaf, 40-60 days to full maturity. Cool season annual. Lakeside has uniform thick dark green smooth leaves. It has a round to oval leaf shape with an upright plant habit that makes it easy to harvest. It is a very versatile variety it can be uses for baby leaf, bunch or clip. ~ 2,500 seeds / oz.
View on True Leaf Market ↗▸Seaside - Hybrid25–60 days
Container; Vegetable; Annual
Spinach Seeds - Seaside - Hybrid. Non-GMO. Spinacea oleracea. 25-30 days maturity for baby leaf, 40-60 days to full maturity. Cool season annual. Seaside is a very uniform baby leaf variety. It has a moderate growth rate and an upright plant habit. Seaside has a nice, smooth, thick, very dark green, spade-shaped leaf making it a perfect choice for baby leaf growers. ~ 2,500 seeds / oz.
View on True Leaf Market ↗▸Regiment F131–43 days
Spring/fall/overwinter; Giant leaf-type
Resistance: HR: Downy Mildew (1-7, 11, 13, 15, 16, 18)
Vigorous plants pack on the weight, producing healthy bunches in no time. Very quick growing, lightly savoyed leaves with a distinctive arrowhead shape and bright-eyed, medium green finish. Excellent texture and mild flavor. Good resistance to bolting and can withstand extremely damp conditions. Excellent performance in the field or tunnel. Precision sized.
Growing notes: Days to maturity are from direct seeding. Spinach is a cool- season hardy annual that thrives in fertile and moist soil. Spinach is sensitive to soil pH, preferring a range of 6.5-7.0. Direct seed as soon as soil can be worked in the spring and until early fall. Seed germinates best when soil temperatures are 32-60°F. Overwintered spinach is best started in late summer and harvested in late winter when days begin to get longer. Store washed spinach close to freezing and at high humidity for 10-14 days.
View on High Mowing ↗▸America34–46 days
Direct sow; Grows well with containers; Grows well with raised beds; Matures in <90 days; Start indoors
America Spinach will produce a beautiful dark green plant in only 40 days - Excellent flavor - Extremely easy to grow - Grows best during the cooler months - Grows really well in containers and other small spaces How to Grow | Spinach is very hardy and can tolerate cold — in fact, it thrives in cold weather. Spinach grows really well during winter months in the South. Spinach also grows well in early spring and late summer in the North. These seeds should be planted about four weeks before your area's average date of last frost. Days to Maturity | 40 days
View on Seeds Now ↗▸Butterflay34–46 days
Field variety; Spring/fall
Productive variety sporting very large, glossy dark green leaves with rich flavor. Butterflay stole the show among the hybrid and open-pollinated spinach varieties in our fall trials, exhibiting better vigor and emergence than any other variety, as well as unmatched intense green color.
Growing notes: Days to maturity are from direct seeding. Spinach is a cool- season hardy annual that thrives in fertile and moist soil. Spinach is sensitive to soil pH, preferring a range of 6.5-7.0. Direct seed as soon as soil can be worked in the spring and until early fall. Seed germinates best when soil temperatures are 32-60°F. Overwintered spinach is best started in late summer and harvested in late winter when days begin to get longer. Store washed spinach close to freezing and at high humidity for 10-14 days.
View on High Mowing ↗▸Space F134–46 days
All-season variety
Resistance: HR: Downy Mildew (1-3, 5, 6, 8, 9, 11, 12, 14, 16, 19)
Vigorous, all-season spinach with thick, glossy leaves that are smooth to slightly savoyed. A favorite variety of commercial growers, the plants are highly resistant to downy mildew and perform well in variable weather for all-season production. Resistant to bolting with deep green leaves that maintain excellent flavor. A high yielder due to the long harvest window and exceptional field holding quality. From Bejo Seeds. Precision sized.
Growing notes: Days to maturity are from direct seeding. Spinach is a cool- season hardy annual that thrives in fertile and moist soil. Spinach is sensitive to soil pH, preferring a range of 6.5-7.0. Direct seed as soon as soil can be worked in the spring and until early fall. Seed germinates best when soil temperatures are 32-60°F. Overwintered spinach is best started in late summer and harvested in late winter when days begin to get longer. Store washed spinach close to freezing and at high humidity for 10-14 days.
View on High Mowing ↗▸Early Hybrid No 736–40 days
Container; Vegetable; Annual
Early Hybrid No. 7 Spinach Seeds. 36 to 40 Days. F1 Hybrid, Non-GMO. Spinacia oleracea. Large green semi-savoyed leaves. A great choice for home garden or market growers. Can be sown twice each season. ~ 2,100 Seeds / Oz.
View on True Leaf Market ↗▸Matador37–49 days
Field/tunnel; Fall/overwinter; Winter hardy
Top-yielding variety with strong cold tolerance. The growth habit of this plant makes for excellent baby spinach production and its smooth leaves allow for easy washing. From Kultursaat, biodynamic breeders in Germany, this variety outperforms other cold-tolerant varieties and develops exceptionally well when overwintered. Unavailable in 2024
Growing notes: Days to maturity are from direct seeding. Spinach is a cool- season hardy annual that thrives in fertile and moist soil. Spinach is sensitive to soil pH, preferring a range of 6.5-7.0. Direct seed as soon as soil can be worked in the spring and until early fall. Seed germinates best when soil temperatures are 32-60°F. Overwintered spinach is best started in late summer and harvested in late winter when days begin to get longer. Store washed spinach close to freezing and at high humidity for 10-14 days.
View on High Mowing ↗▸Renegade F137–49 days
Field/tunnel; All-season variety; Bolt resistant
Resistance: HR: Downy Mildew (1-7, 11, 13, 15, 16, 18)
Ultimate bolt tolerance with smooth, dark green oval leaves. Grows a bit slower than Corvair F1 but excels in quality of leaf when handled; never prone to brittleness or cracking. Good disease and virus resistance; ideal for winter high tunnels. Precision sized.
Growing notes: Days to maturity are from direct seeding. Spinach is a cool- season hardy annual that thrives in fertile and moist soil. Spinach is sensitive to soil pH, preferring a range of 6.5-7.0. Direct seed as soon as soil can be worked in the spring and until early fall. Seed germinates best when soil temperatures are 32-60°F. Overwintered spinach is best started in late summer and harvested in late winter when days begin to get longer. Store washed spinach close to freezing and at high humidity for 10-14 days.
View on High Mowing ↗▸Abundant Bloomsdale38–52 days
OSSI; Tunnel/field; Spring/fall; Ideal for full sized leaves
Delicious, glossy, dark green leaves with the most savoyed texture we’ve seen. Thick, sweet-tasting leaves with rounded shape and juicy, succulent texture. Slow growing with large, upright leaves in the mild Pacific Northwest and slightly more compact habit in our Northeast trials. Started at the Abundant Life Seed Foundation in 2002; breeding finished by a team of organic farmers with support from Organic Seed Alliance (OSA) and released under the Open Source Seed Initiative. A portion of this variety's sales supports OSA’s breeding program. Limited availability in 2024
Growing notes: Days to maturity are from direct seeding. Spinach is a cool- season hardy annual that thrives in fertile and moist soil. Spinach is sensitive to soil pH, preferring a range of 6.5-7.0. Direct seed as soon as soil can be worked in the spring and until early fall. Seed germinates best when soil temperatures are 32-60°F. Overwintered spinach is best started in late summer and harvested in late winter when days begin to get longer. Store washed spinach close to freezing and at high humidity for 10-14 days.
View on High Mowing ↗▸Acadia F138–52 days
Field/tunnel; Spring/fall/overwinter; Baby leaf
Resistance: HR: Downy Mildew (1-13, 15, 16)
Acadia is a vigorous baby-leaf spinach with very dark, slightly savoyed, slightly cupped leaves that have good loft and are easy to wash. Upright plants are easy to harvest and slow to bolt across seasons, and the variety overwinters well. Adaptable to both spring and fall plantings. An organic hybrid from Vitalis Organic Seeds.
Growing notes: Days to maturity are from direct seeding. Spinach is a cool- season hardy annual that thrives in fertile and moist soil. Spinach is sensitive to soil pH, preferring a range of 6.5-7.0. Direct seed as soon as soil can be worked in the spring and until early fall. Seed germinates best when soil temperatures are 32-60°F. Overwintered spinach is best started in late summer and harvested in late winter when days begin to get longer. Store washed spinach close to freezing and at high humidity for 10-14 days.
View on High Mowing ↗▸Bloomsdale38–52 days
Direct sow; Grows well with containers; Grows well with raised beds; Matures in <90 days; Start indoors
Bloomsdale Spinach is a cold-hardy heirloom variety prized by gardeners for its tender, nutrient-rich leaves and savory taste. The deeply savoyed foliage resists bolting in cool seasons, making it ideal for succession planting throughout spring and fall. This vigorous grower produces abundant harvests whether you pick individual leaves or cut entire plants. Perfect for fresh salads, cooking, or storage. Germinates quickly in cool soil and adapts well to containers or garden beds. Produces heavy, glossy, dark green leaves. Excellent flavor. Extremely easy to grow. How to Grow | Spinach is very hardy and can tolerate cold — in fact, it thrives in cold weather. Spinach grows really well during winter months in the South. Spinach also grows well in early spring and late summer in the North. These seeds should be planted about four weeks before your area's average date of last frost. Days to Maturity | 45 days Overall, Bloomsdale Spinach produces heavy, glossy, dark green leaves with excellent flavor. This extremely easy-to-grow variety thrives in cold weather, making it perfect for winter gardening in the South and early spring or late summer planting in the North. Plant seeds about four weeks before your area's last frost date. Ready to harvest in 45 days.
View on Seeds Now ↗▸Bloomsdale Longstanding38–52 days
Field or tunnel; Early spring/fall crop; Ideal for overwintering
Bloomsdale Longstanding is a very cold-hardy heirloom spinach with dark green, heavily savoyed leaves. Best grown for early spring and fall, it has good cold-soil emergence but tends to bolt in heat. It performs well in winter greenhouses or overwintered outdoors under mulch. The original Bloomsdale spinach traces to D. Landreth Seed Company in the 1800s.
Growing notes: Days to maturity are from direct seeding. Spinach is a cool- season hardy annual that thrives in fertile and moist soil. Spinach is sensitive to soil pH, preferring a range of 6.5-7.0. Direct seed as soon as soil can be worked in the spring and until early fall. Seed germinates best when soil temperatures are 32-60°F. Overwintered spinach is best started in late summer and harvested in late winter when days begin to get longer. Store washed spinach close to freezing and at high humidity for 10-14 days.
View on High Mowing ↗▸Matador Viking38–52 days
Direct sow; Grows well with containers; Grows well with raised beds; Matures in <90 days; Start indoors
Matador Viking Spinach will produce beautiful large and smooth dark green spinach leaves in only 45 days - Excellent flavor - Full of nutrients - Extremely easy to grow - Grows best during the cooler months - Grows really well in containers and other small spaces How to Grow | Spinach is very hardy and can tolerate cold — in fact, it thrives in cold weather. Spinach grows really well during winter months in the South. Spinach also grows well in early spring and late summer in the North. These seeds should be planted about four weeks before your area's average date of last frost. Days to Maturity | 45 days
View on Seeds Now ↗▸Monstrueux De Viroflay38–52 days
Direct sow; Grows well with containers; Grows well with raised beds; Matures in <90 days; Start indoors
Monstrous Viroflay spinach is a variety of spinach known for its large, dark green leaves and delicious flavor. It is a popular choice among gardeners and spinach enthusiasts due to its impressive size and nutritional value. This variety of spinach is named after the town of Viroflay in France, where it was first cultivated. It is known for its vigorous growth and ability to produce abundant harvests. Monstrous Viroflay spinach is rich in vitamins A, C, and K, as well as iron, calcium, and fiber. It is a nutrient-dense leafy green that can be enjoyed in a variety of dishes, including salads, sautés, and smoothies. One of the key features of Monstrous Viroflay spinach is its size. The leaves can grow up to 10 inches long, making them perfect for salads or as a side dish. The large leaves also make it easier to harvest and prepare the spinach. When growing Monstrous Viroflay spinach, it is important to provide it with well-drained soil and ample sunlight. This variety thrives in cool weather and can be planted in early spring or late summer for a fall harvest. Monstrous Viroflay spinach is a versatile and nutritious addition to any garden or kitchen. Its impressive size, delicious taste, and health benefits make it a favorite among spinach lovers. How to Grow | Spinach is very hardy and can tolerate cold — in fact, it thrives in cold weather. Spinach grows really well during winter months in the South. Spinach also grows well in early spring and late summer in the North. These seeds should be planted about four weeks before your area's average date of last frost. Days to Maturity | 45 days
View on Seeds Now ↗▸Nobel Giant38–52 days
Direct sow; Grows well with containers; Grows well with raised beds; Matures in <90 days; Start indoors
The Noble Giant spinach is heavy, glossy, dark green plant with leaves that are heavily savoyed and crumpled - Extremely delicious and one of the most popular spinach varieties you can grow in your garden - Very easy to grow How to Grow | Spinach is very hardy and can tolerate cold — in fact, it thrives in cold weather. Spinach grows really well during winter months in the South. Spinach also grows well in early spring and late summer in the North. These seeds should be planted about four weeks before your area's average date of last frost. Days to Maturity | 45 days
View on Seeds Now ↗▸Chinese - Green Arrow - Hybrid40–60 days
Container; Vegetable; Annual
Resistance: HR: Downy Mildew (Race 1-11, 14, 15)
Spinach Seeds - Chinese - Green Arrow - Hybrid. Annual. Spinacea oleracea. Asian Type. Non GMO. 40 to 60 days to maturity. Pointed Leaves in a dark green color. Slow bolting, cold and heat tolerant. Light pink root. Resistant to DM race 1-11, 14,15. Can be sowed in spring, summer and fall seasons. Spinach is a cool weather crop. Seeds prefer to germinate in cold weather. ~ 2,500 seeds / oz.
View on True Leaf Market ↗▸Viroflay40–50 days
Heirloom; Container; Vegetable; Annual
Non-GMO, Heirloom Viroflay Spinach Vegetable Garden Seed from True Leaf Market. Spinacia oleracea. Viroflay Spinach Seeds originate from France around the 17th century and have been cultivated in Paris. The crisp rich-green leaves of this French heirloom grow 10" long, are fast-maturing and can be harvested earlier than others! As a hardy cool season crop, this semi-savoyed spinach, also known as "Monster Spinach" provides less oxalic acid than other varieties with sweeter flavor. Large-leaf annual spinach is easy to plant in your summer or fall garden, as it develops abundantly. Viroflay Spinach is also used to make medicine, treat illness, boost brain health and aid digestion.
View on True Leaf Market ↗▸Giant Winter42–58 days
Tunnel; Fall/overwinter; Baby or full sized leaves
Dark green, glossy leaves are deeply savoyed and selected for cold hardiness. High-yielding variety recommended for fall crops, winter greenhouse production, or overwintering outdoors under mulch. Incredibly cold hardy; specifically developed for overwintering for a spring crop.
Growing notes: Days to maturity are from direct seeding. Spinach is a cool- season hardy annual that thrives in fertile and moist soil. Spinach is sensitive to soil pH, preferring a range of 6.5-7.0. Direct seed as soon as soil can be worked in the spring and until early fall. Seed germinates best when soil temperatures are 32-60°F. Overwintered spinach is best started in late summer and harvested in late winter when days begin to get longer. Store washed spinach close to freezing and at high humidity for 10-14 days.
View on High Mowing ↗▸Winter Giant42–58 days
Heirloom; Container; Vegetable; Annual
50 days. Spinacia oleracea. Winter Giant Spinach Seeds. Non-GMO, annual, heirloom, open-pollinated. This crop is suitable for garden plots, raised beds, and containers. Winter Giant is a very cold-hardy spinach selected for late fall and early winter crops, with large, savoyed, deep-green leaves that stay sweet in cool weather. ~2,100 seeds/oz.
View on True Leaf Market ↗▸Giant Noble45–48 days
Heirloom; AAS Winner; Container; Vegetable; Annual
Non-GMO. Heirloom. Giant Noble Spinach Vegetable Garden Seed. Spinacia oleracea. The smooth and rich-green leaves of these spinach plants help provide this heirloom's name" as Giant Noble Spinach leaves grow 25" long! Also known as "Smooth Leaf Spinach" this verdant and subtly sweet vegetable produces for a long summer harvest and gives a savory flavor when cooked. Excellent variety for canning or freezing. The big thick leaves hold up well. 2,500 seeds/oz.
View on True Leaf Market ↗▸Dash - Hybrid51–69 days
Container; Vegetable; Annual
Spinach Seeds - Dash -Hybrid. Non-GMO. Spinacea oleracea. 60 days. Cool season annual. Extra-early spinach hybrid that suitable for growing under low temperatures, especially during winter in warm areas. Cold tolerance for fall to winter harvest and can tolerate some heat. The upright growing plants have good leaf shape, medium green color, excellent flavor and uniformity. Medium bolting. Prefers mild and cool temperatures. ~ 2,500 seeds / oz.
View on True Leaf Market ↗
Plant spacing
In a square-foot bed, space spinach about 4 in apart — that fits 9 plants in each 1-foot square (3×3). Wider rows or containers space the same.
Plan your spinach planting
Add spinach to a free GardenDraft plan and get sow, transplant, and harvest dates computed for your ZIP code — with a drag-and-drop bed layout and reminders when it’s time to plant.
Start your free plan →At a glance
Storing & preserving
Best used right away — quality drops fast. Refrigerate in a bag with a paper towel; best within a week.
- Freeze: Cooking greens freeze after blanching; salad greens don't.
General home-preservation guidance — for tested processing times and safety, follow the National Center for Home Food Preservation.
Growing timeline
Companion planting — with cited sources
From US/Canada cooperative-extension publications and peer-reviewed studies. Evidence-tier dots show how strongly each recommendation is backed: ●●● peer-reviewed mechanism · ●● extension consensus · ● traditional knowledge with a plausible mechanism.
Pairs well with (6)
- StrawberryEvidence tier B: Extension consensus across multiple US/Canada land-grant institutionsshade-shelter
Spinach inter-row planting in strawberry beds is a documented Northeast practice: spinach matures in cool spring conditions before strawberry foliage fills in and bolts as strawberries take over. Mutual bed-use benefit.
Timing: Direct-seed spinach in early spring between strawberry rows; harvest by the time strawberries flower.
Region: Northeast, Upper Midwest, Eastern Canada.
Source: S1, Penn State Extension
- CilantroEvidence tier C: Traditional practice with plausible mechanism but limited empirical replicationpredator-attract
Cilantro umbels attract syrphid adults whose larvae predate spinach aphids; both crops share cool-season culture making the pairing practical.
- Common OnionEvidence tier C: Traditional practice with plausible mechanism but limited empirical replicationpest-deter
Allium volatiles may mask spinach from leafminer flies; widely recommended in extension home-garden guides though direct evidence is limited.
Source: University of Maryland Extension
- Common RadishEvidence tier C: Traditional practice with plausible mechanism but limited empirical replicationshade-shelter
Cool-season co-planting — both germinate quickly and have similar moisture/temperature windows. Spatial-efficiency pairing.
Source: University of Maryland Extension
- Lamb's LettuceEvidence tier C: Traditional practice with plausible mechanism but limited empirical replicationshade-shelter
Mâche and spinach share cool-season cultural needs (overwintered baby greens), and Northeast small-farm guides describe them as compatible companions in overwintered cold-frame plantings because of similar pH, harvest cycle, and pest profile.
Timing: Sow late summer to early fall for winter and early spring harvest.
Region: Northeast overwintering systems.
- Mountain SpinachEvidence tier C: Traditional practice with plausible mechanism but limited empirical replicationshade-shelter
Orach (Atriplex hortensis) is grown as a heat-tolerant spinach substitute and can be succeeded with or interplanted next to spinach as the season warms to extend the leaf-green supply.
Timing: Transition: sow orach 3-4 weeks before spinach bolts in spring.
Source: S7
Avoid planting near (2)
- Common BeetEvidence tier B: Extension consensus across multiple US/Canada land-grant institutionsdisease-host, alternate-host-pest
Beet and spinach share the spinach/beet leafminer (Pegomya hyoscyami) and Cercospora leaf spot. Avoid sequential plantings or interplant with caution.
Source: S1, University of Maryland Extension
- QuinoaEvidence tier B: Extension consensus across multiple US/Canada land-grant institutionsalternate-host-pest
Shares leafminer (Liriomyza/Amauromyza spp.) with quinoa, so separate plantings reduce pest carryover. NOTE: their downy mildews are different Peronospora species (P. effusa vs P. variabilis) and do not cross-infect, so disease sharing is not a basis here.
Source: S22, Agriculture and Agri-Food Canada
Good successors in rotation (1)
- StrawberryEvidence tier C: Traditional practice with plausible mechanism but limited empirical replicationsoil-conditioning
Spinach is commonly recommended as a fall-planted cool-season companion or predecessor for strawberry beds because both prefer cool, fertile, well-drained soils and spinach finishes before strawberry runners spread. Treat as rotation/early-spring intercrop, not a long-season pair.
Source: S1, University of Maryland Extension
Sources cited
- S1
- Cornell University Cooperative Extension — vegetable production guides
- S14
- University of Vermont Extension
- S22
- University of Saskatchewan / Saskatchewan Ministry of Agriculture
- S25
- Agriculture and Agri-Food Canada
- S27
- Eliot Coleman — *The New Organic Grower*
- S5
- Michigan State University Extension
- S6
- Penn State Extension
- S7
- University of Minnesota Extension
- S9
- University of Maryland Extension — Home & Garden Info Center
Care & troubleshooting— extension-sourced, with citations
When to feed, prune & water
Mulch to suppress weeds and retain moisture
Mulch- Routine careApply organic mulch around plantsstrong evidence — extension confidence
Spread a few inches of straw, shredded leaves, or compost around established plants (keeping it off stems) to hold soil moisture, suppress weeds, and moderate soil temperature; wait until soil has warmed for heat-loving crops.
Plan crop rotation
Rotation- Routine careRotate plant families between bedsstrong evidence — extension confidence
Avoid planting the same family in the same bed in consecutive years (aim for a 3+ year gap), grouping crops by family so soilborne diseases and pests that build up don't carry over to the next susceptible crop.
- Routine careSequence for soil healthmoderate evidence — extension confidence
Follow heavy feeders like tomatoes and brassicas with legumes or a cover crop to support soil fertility and structure, and keep simple notes each year so you can track where each family grew.
Protect the garden from rabbits and voles
Protection- Routine careFence out rabbitsstrong evidence — extension confidence
Surround beds with 1-inch mesh chicken wire at least 2 feet tall with the bottom buried or staked down a few inches so rabbits can't push under it.
- Routine careReduce vole habitat and guard stemsstrong evidence — extension confidence
Keep grass and mulch pulled back from plant bases and crowns to remove vole cover, mow surrounding vegetation, and use hardware-cloth guards around vulnerable woody stems before winter.
Thin beet-family seedlings
Thinning- Routine careThin clusters to one plant each· every 2 wks · ~2 wksstrong evidence — extension confidence
Beet/chard 'seeds' are clusters, so several sprout together. Thin to one strong seedling every 3-4 in; the thinnings are edible greens.
Clean up debris and sanitize at season end
SanitationUnusual this time of year.
- Routine careRemove spent plants and fallen debrisstrong evidence — extension confidence
Pull and clear old plants, dropped fruit, and leaf litter at season end, since many pests and diseases overwinter in this debris; dispose of diseased material rather than composting it.
- Routine careClean tools, stakes, and cagesmoderate evidence — extension confidence
Wash and sanitize stakes, cages, and tools that touched diseased plants before storing or reusing them to avoid carrying pathogens into next season.
Something looks wrong?
Describe what you see on your spinachand we'll rank the likely causes — most likely first, least-invasive fix first.
Blister beetles
Pestmoderate- CulturalHand-pick wearing gloves· every 2 daysmoderate evidence — extension confidence
Wear gloves (these beetles release a blistering fluid) and knock beetles into soapy water, or use row cover ahead of swarms; their larvae eat grasshopper eggs, so tolerate light feeding when you can.
- OrganicSpot-treat heavy swarms· every 1 wkmoderate evidence — extension confidence
If a large swarm threatens a planting, a pyrethrin or other labeled insecticide can knock them back per the label; avoid spraying open blooms to protect pollinators.
Cercospora leaf spot on beet and chard
Diseasemoderate- CulturalRotate, space out, and water at the basestrong evidence — extension confidence
The fungus survives on debris and spreads by splashing water, so rotate beds, space plants for airflow, and water at the soil rather than overhead. Remove and discard heavily spotted outer leaves and clear crop residue after harvest.
- OrganicApply a copper fungicide if spreading· every 10 daysmoderate evidence — extension confidence
If spotting is severe and weather stays warm and humid, apply a labeled copper fungicide preventively per the label, before the disease takes over the planting.
Japanese beetles
Pestmoderate- CulturalHandpick into soapy water· every 1 days · ~4 wksstrong evidence — extension confidence
In early morning when beetles are sluggish, knock them into a bucket of soapy water; daily removal also reduces the scent that draws in more beetles. Skip the lure traps, which tend to attract more beetles than they catch.
- CulturalCover plants past bloommoderate evidence — extension confidence
On crops that have finished flowering and set fruit, drape a row cover or netting to keep beetles off without blocking pollination during bloom.
Potassium deficiency
Deficiencymoderate- CulturalConfirm with a soil test firststrong evidence — extension confidence
Edge scorch on older leaves has several causes, so get a soil test before adding potassium; over-applying can lock out magnesium and calcium.
- OrganicApply potassium per soil-test guidancemoderate evidence — extension confidence
If the test confirms low potassium, apply a potassium source (such as sulfate of potash) at the labeled/test-recommended rate and keep watering even, since drought worsens uptake.
Slugs & snails
Pestmoderate- CulturalTrap, hand-pick at night, reduce cover· every 2 days · ~3 wksstrong evidence — extension confidence
Pick at night with a flashlight, set shallow beer traps, water in the morning so soil dries by dusk, and clear damp hiding spots.
- OrganicIron-phosphate bait - label use only· every 1 wk · ~3 wksmoderate evidence — extension confidence
Scatter a labeled iron-phosphate slug bait sparingly per the label; it's pet- and wildlife-safer than metaldehyde.
White Rust (Spinach)
Diseasemoderate- CulturalRotate, bury debris, and use partial-resistant cultivarsstrong evidence — extension confidence
Use 3-year rotations away from spinach, deep-plow infected residue, and choose partially resistant cultivars, since no fully resistant variety exists for this oomycete.
- CulturalReduce leaf wetness and crowdingmoderate evidence — extension confidence
Avoid overhead irrigation and very high planting densities to shorten leaf-wetness periods that favor infection.
Spinach downy mildew
DiseasemoderateUnusual this time of year.
- CulturalUse resistant varieties and improve airflowstrong evidence — extension confidence
Resistant cultivars are the most reliable control, so choose seed listing downy mildew resistance and space plants for good airflow. Avoid overhead watering, harvest cleanly rather than cutting for regrowth, and remove infected leaves promptly.
Wireworms
PestmoderateUnusual this time of year.
- CulturalRotate away from grassy groundstrong evidence — extension confidence
Avoid planting susceptible crops right after sod, pasture, or grass cover, where wireworms build up; rotate to a less-favored crop and let infested beds dry out between plantings.
- CulturalBait-trap to monitor· every 5 days · ~3 wksmoderate evidence — extension confidence
Bury pieces of carrot or potato or a handful of soaked wheat seed as bait when soil reaches about 50F, check after several days, and remove the worms you find to gauge and reduce pressure.
Aphids
Pestlow- CulturalBlast off with water· every 3 days · ~2 wksstrong evidence — extension confidence
Knock colonies off with a strong jet of water in the morning; repeat every few days. Light infestations rarely need more.
- OrganicInsecticidal soap - label use only· every 1 wk · ~3 wksmoderate evidence — extension confidence
For persistent colonies apply insecticidal soap to undersides per label. Avoid open flowers.
Bolting (premature flowering)
Disorderlow- CulturalShade and harvest before boltingstrong evidence — extension confidence
Once a plant bolts it can't be reversed, so harvest at the first sign of stalk formation; 30-50% shade cloth and steady watering during heat help delay bolting in cool-season crops.
- CulturalUse bolt-resistant varieties and succession sowmoderate evidence — extension confidence
Choose heat-tolerant, slow-bolt varieties and stagger small sowings so a heat spell doesn't take out the whole planting.
Leaf miners
Pestlow- CulturalPick mined leaves + row cover· every 5 days · ~3 wksmoderate evidence — extension confidence
Remove and bag leaves with tunnels, and cover plants with insect netting to block the egg-laying flies. Damage is mostly cosmetic on leafy crops.