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Lime Basil

Ocimum americanum
Also known as: Lime Basil, Hoary Basil, American Basil

Lime Basil is a herb in the Lamiaceae family. It grows best in full sun with medium moisture, and is listed for USDA zones 2-13. Plants reach harvest about 55–70 days after planting and sit about 12 inches apart.

Varieties

1 from Seeds Now · sorted by days to maturity
  • Lime55–70 days

    Can tolerate hot temperatures; Direct sow; Grows well in full sun; Grows well with containers; Grows well with raised beds; Matures in <90 days; Start indoors; Super easy to grow

    Lime Basil is as fresh and uplifting as it sounds. The bright green leaves are infused with a zesty lime fragrance and tangy flavor that’s best used fresh in coconut-heavy Asian dishes, seafood dishes, fruit salads, limeade, cocktails, and salad dressings. Add at the end of cooking to preserve the citrus flavor, then garnish with the edible flowers. Harvest the leaves and stems from the top part of the plant, and pinch off edible flower buds as they appear, which prevents the leaves from turning bitter, and signals the plant to branch out and grow more leaves, making a bushier plant. The more you harvest, the more it grows! Fresh, zesty lime-anise flavor Culinary and medicinal Good for indoor gardens Good for containers Tons of medicinal benefits! As a medicinal herb, Basil has been used internally to treat anxiety, colds, colic, cough, depression, diarrhea, fever, flatulence, flu, indigestion, insomnia, intestinal parasites and worms, exhaustion, gastric pain, gonorrhea, lactation problems, migraine headache, nausea, stomach cramps, sore throat, and vomiting, and externally to treat acne, insect bites and stings, loss of smell, skin problems, snake bites. ⚠️ Do not use medicinally while pregnant. ⚠️ Medicinal properties are presented as information only, and are not a recommendation or prescription for use. Consult a medical professional before using any herb medicinally. As a companion plant, it attracts hummingbirds, pollinators, and beneficial insects, and repels asparagus beetles, cabbage moths, cabbage white butterfly, cabbage worms, carrot rust fly, flies, maggots, mice, mosquitoes, spider mites, thrips, and tomato hornworms. Shop all Basil Seeds Shop Good Companion Plants for Basil 📚 Grow Guide: Basil The Lime Basil plant is very easy to grow and smells extremely fragrant! It has an amazing lemon scent, perfect for homemade lemonade! Use this in all your favorite culinary creations! It grows to the perfect size for planting in containers, and the aroma of just passing by this herb, will take your senses on an enjoyable ride. What is Lime Basil? Lime Basil offers a crisp citrus flavor, with a zesty undertones. It grows as an annual herb with white or lavender flowers. It has many medicinal purposes which makes it an "all around great herb" to grow in your own gardens. Health Benefits of Lime Basil From treating some cancers, symptoms of stress, asthma and diabetes, Lime Basil is recognized widely as a medicinal herb. Ways to Consume Lime Basil Used commonly in fresh cooked recipes, always add it at the last moment so that the cooking doesn't destroy the citrus flavor. It is a favorite ingredient in pesto, and used to thicken soups. Try it with fried chicken, or steeping it in milk to create lovely ice creams or chocolates. Don't toss the flower buds, they are full of flavor and are edible as well. See Basil Recipes & Growing Tips on our Pinterest Board Follow SeedsNow.com's board Basil on Pinterest. Shop all Basil Seeds Shop Good Companion Plants for Basil 📚 Grow Guide: Basil

    View on Seeds Now
Family
Lamiaceae
Category
Herb
Form
Bush
Lifecycle
annual or perennial
Zone
2-13
Height
1.5–2 ft
Spread
1.5–2 ft
Sun
Full sun

Plant spacing

1 plant per square footSquare-foot planting diagram: one lime basil fills a 1-foot square, spaced 12 inches from its neighbors.
1 plant per square foot

In a square-foot bed, space lime basil about 12 in apart — that fits 1 plant in each 1-foot square (1×1). Wider rows or containers space the same.

Water
Medium

Plan your lime basil planting

Add lime basil 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

Days to harvest
55–70 days
From transplant or sow to first harvest
Harvest style
Keep picking
Crops over several weeks
Frost tolerance
Warm-season · to ~40°F
Lowest temperature the foliage usually survives
Succession
Good for succession sowing

Storing & preserving

Keep on the counter in water like cut flowers — cold turns it black.

  • Freeze: Blend with oil and freeze in cubes, or freeze as pesto.
  • Dry: Dries easily but loses much of its aroma.

General home-preservation guidance — for tested processing times and safety, follow the National Center for Home Food Preservation.

Growing timeline

When to plant and harvest lime basilPlanting timeline for lime basil, relative to last frost: start indoors from 5 weeks before last frost to 1 week after last frost; grow from 1 week after last frost to 9 weeks after last frost; harvest from 9 weeks after last frost to 11 weeks after last frost.Start indoorsGrowHarvestLast frostTransplant
Start lime basil indoors ~6 weeks before transplanting 1 week after last frost; first harvest 9 weeks after last frost.
Seed to transplant
28-42 days
Outdoor planting
7 to 14 days vs frost
Propagation
Seed
Schedule anchor
Last Frost

Care & troubleshooting— extension-sourced, with citations

When to feed, prune & water

Attract beneficial insects and protect pollinators

Protection
  • Routine carePlant insectary flowers and tolerate light pestsstrong evidence — extension confidence

    Grow a diversity of flowering plants (including small-flowered umbels and asters) to feed predators and parasitoids, and tolerate low pest numbers so natural enemies have prey to stick around.

    Source: UC IPM; UMN Extension

  • Routine careNever spray open bloomsstrong evidence — extension confidence

    Avoid insecticides on flowering plants and apply any needed sprays in the evening when pollinators aren't active, and favor selective products over broad-spectrum ones to spare bees and beneficials.

    Source: UC IPM

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.

    Source: UMN Extension; Missouri Botanical Garden

Pinch leafy herbs to stay productive

Pruning
  • Routine carePinch tips and flower buds weekly· every 1 wk · ~10 wksmoderate evidence — extension confidence

    Pinch the growing tips above a leaf pair and remove flower buds as they form. This keeps basil bushy and leafy instead of bolting to seed.

    Source: UMN Extension

Trim and divide perennial herbs

Pruning
  • Routine careShear after growth flushes; divide every few yearsmoderate evidence — extension confidence

    Shear perennial herbs like mint, oregano, thyme and sage after flushes of growth to keep them compact and productive, and divide crowded clumps in spring or fall to renew vigor and airflow. Go easy on fertilizer — lean conditions give stronger flavor.

    Source: UMN Extension

Clean up debris and sanitize at season end

Sanitation

Unusual 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.

    Source: UMN Extension; Cornell

  • 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.

    Source: Cornell; UMN Extension

Harden off seedlings

Protection

Unusual this time of year.

Read: starting seeds indoors

Something looks wrong?

Describe what you see on your lime basiland we'll rank the likely causes — most likely first, least-invasive fix first.

Japanese beetles

Pestmoderate

Symptoms: leaves skeletonized between veins; lacy chewed foliage; metallic green-bronze beetles clustered on plants; feeding worst in warm midsummer sun

Powdery mildew

Diseasemoderate

Symptoms: white powdery coating on upper leaf surfaces; starts as spots then spreads; leaves yellow and dry under the coating

  • CulturalImprove airflow + remove worst leavesstrong evidence — extension confidence

    Cut out the most heavily coated leaves and thin for airflow; avoid wetting foliage late in the day.

    Source: UC IPM

  • OrganicPotassium-bicarbonate or sulfur - label use only· every 1 wk · ~4 wksmoderate evidence — extension confidence

    Apply a labeled potassium-bicarbonate or sulfur fungicide weekly per the label. No sulfur within 2 weeks of oil or in high heat.

    Always follow the product label — it is the law.

    Source: UC IPM

Root rot from overwatering / poor drainage

Diseasemoderate

Symptoms: stunted yellowing plants that wilt despite wet soil; soft brown mushy roots; sloughing root outer layer leaving thread-like core; poor growth in low or compacted wet spots; seedlings collapsing at the soil line

Slugs & snails

Pestmoderate

Symptoms: large ragged holes with smooth edges; slimy silvery trails; damage worst after rain and overnight

  • 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.

    Source: UC IPM: Snails and Slugs

  • 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.

    Always follow the product label — it is the law.

    Source: UC IPM

Spider mites

Pestmoderate

Symptoms: fine pale stippling/speckling on leaves; fine webbing on undersides in hot dry spells; leaves bronzing and dropping

  • CulturalHose down and raise humidity· every 3 days · ~2 wksstrong evidence — extension confidence

    Mites thrive in hot, dry, dusty conditions. Spray foliage (especially undersides) with water to dislodge them and reduce dust.

    Source: UC IPM

  • OrganicInsecticidal soap or horticultural oil - label use only· every 5 days · ~2 wksmoderate evidence — extension confidence

    Apply to undersides per label; mites resist many products, so soaps/oils are preferred. Not in extreme heat.

    Always follow the product label — it is the law.

    Source: UC IPM

Whiteflies

Pestmoderate

Symptoms: clouds of tiny white insects fly up when plants are disturbed; yellowing stippled leaves; sticky honeydew and black sooty mold; weak stunted growth

  • CulturalRemove infested leaves and hose off· every 4 daysmoderate evidence — extension confidence

    Pick off and discard heavily infested lower leaves and rinse colonies off undersides with a strong spray of water; yellow sticky cards help monitor numbers.

    Source: UC IPM: Whiteflies

  • OrganicApply a labeled soap or oil· every 1 wk · ~3 wksmoderate evidence — extension confidence

    Apply a labeled insecticidal soap or neem oil per the label, covering leaf undersides; these reduce but won't eliminate whiteflies, so repeat as needed.

    Always follow the product label — it is the law.

    Source: UC IPM: Whiteflies

Aphids

Pestlow

Symptoms: clusters of tiny soft-bodied insects on new growth and undersides; sticky honeydew or sooty mold; curled distorted new leaves; ants tending them

  • 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.

    Source: UC IPM: Aphids

  • 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.

    Always follow the product label — it is the law.

    Source: UC IPM