Skip to main content
← All plants

Lobelia

Lobelia erinus
Also known as: Edging Lobelia, Garden Lobelia, Trailing Lobelia

Lobelia is a flower in the Campanulaceae family. It grows best in full sun to part shade with medium moisture, and is listed for USDA zones 2-13. Plants reach maturity about 77–84 days after planting and sit about 4 inches apart.

Varieties

6 from True Leaf Market · sorted by days to maturity
  • Cambridge Blue77–84 days

    Annual

    Cambridge Blue Lobelia Seeds 77 to 84 days to maturity. Lobelia erinus. Annual. Open Pollinated. Cambridge Blue lobelia is brilliant, easy to grow from seed, and perfectly suited for many humid and temperate climates. Cambridge Blue seeds will excite your home, patio, and garden with fast-growing 4-6" tall lobelia with ½" tubular powder blue blooms. About 520,000 seeds per ounce.

    View on True Leaf Market
  • Crystal Palace77–84 days

    Non-GMO; Container; Annual

    77-84 Days to maturity. Lobelia erinus. Crystal Palace Lobelia Seeds. Non-GMO, open-pollinated, Premium Quality Seeds, annual. Crystal Palace lobelia seeds grow one of spring's most celebrated and resilient blooms boasting classic half- inch violet-blue blooms. Lobelia is easy to grow from seed and a perfect complement in the garden splashed among daisies, pansies, and linaria. Crystal Palace lobelia is a proven garden performer and grown just as popularly indoors as it is out. Lobelia is native to the shaded and humid summers of Southern Africa and promises to perform in a variety of similar gardens. About 650,000 seeds/oz

    View on True Leaf Market
  • Palace Series77–84 days

    Non-GMO; Container; Annual

    77-84 Days to maturity. Lobelia erinus. Palace Series Lobelia Seeds. Non-GMO, open-pollinated, Premium Quality Seeds, annual. Open Pollinated. Palace Series lobelia seeds grow a classic, summer-hardy, and exotic touch to your home or garden. Lobelia is easy to grow from seed and a vigorous outdoor performer, yet still elegant enough for any fresh-cut basket or planter. Palace Series seeds promise tidy 4-6 inch tall lobelia bursting with brilliant half-inch tubular blooms. Palace Series lobelia is an ideal grow to accent rock gardens, fences, and walkways, or as a fresh aromatic in window boxes. Multi-Seed Pellets (MSP). Approx. 5 Seeds per pellet.

    View on True Leaf Market
  • Regatta Series77–84 days

    Non-GMO; Container; Annual

    77-84 Days to maturity. Lobelia erinus. Regatta Series Lobelia Seeds. Non-GMO, open-pollinated, Premium Quality Seeds, annual. Open Pollinated. Regatta Series seeds promise exotic, radiant, and fragrant lobelia mounds that promise to invigorate any home or office with inviting summertime aromas. Regatta Series seeds will excite your home, patio, and garden with these bushy African lobelias in a variety of unique signature colors. Lobelia seeds are vigorous seasonal performers and are an ideal plant for kids or novice gardeners with limited space. Regatta Series lobelia seeds grow a wonderful fresh trailing plant perfectly suited for many hanging baskets, planters, and pots. Multi-Seed Pelleted (MSP). Approx 5 Seeds per pellet.

    View on True Leaf Market
  • Rosamond77–84 days

    Non-GMO; AAS Winner; Container; Annual

    77-84 Days to maturity. Lobelia erinus. Rosamond Lobelia Seeds. Non-GMO, open-pollinated, Premium Quality Seeds, annual. Open Pollinated. Rosamond lobelia seeds grow one of the summer's most exotic, colorful, and exclusive blooms. Rosamond seeds promise your garden compact lobelia trailing mounds dazzling with half-inch heads in delicate shades of rose and pink. Rosamond Lobelia matures into a neat plant, ideal for bedding arrangements or for indoor containers and pots. Rosamond lobelia is native to the humid, shady regions of Southern Africa and is a vigorous performer in similar temperate gardens. About 1,180,000 seeds/oz

    View on True Leaf Market
  • Sapphire77–84 days

    Non-GMO; Container; Annual

    77-84 Days to maturity. Lobelia erinus. Sapphire Lobelia Seeds. Non-GMO, open-pollinated, Premium Quality Seeds, annual. Open Pollinated. Sapphire lobelia seeds grow one of summer's most exciting bedding, trailing, and hanging plants. Sapphire seeds bring your home or garden classic and elegant lobelia delighting with charming ½ inch sapphire and violet blooms. Lobelia is perfect for shaded porches, window sills, baskets, or for accenting along the base of a leafy deciduous. Sapphire lobelia seeds are quick to mature and grow very similarly to pansies and linaria, the perfect grow for busy or limited gardeners. About 1,180,000 seeds/oz

    View on True Leaf Market
Family
Campanulaceae
Category
Flower
Form
Bush
Lifecycle
annual
Zone
2-13
Height
0.3333333333333333–0.6666666666666666 ft
Spread
0.3333333333333333–1 ft
Sun
Full sun to part shade

Plant spacing

9 plants per square footSquare-foot planting diagram: a 1-foot square divided into a 3-by-3 grid holding 9 lobelia plants spaced 4 inches apart.
9 plants per square foot

In a square-foot bed, space lobelia about 4 in apart — that fits 9 plants in each 1-foot square (3×3). Wider rows or containers space the same.

Water
Medium

Plan your lobelia planting

Add lobelia 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
77–84 days
From transplant or sow to first harvest
Harvest style
Harvest once
One main harvest
After harvest
Use within days
Quality eases off after peak
Frost tolerance
Tender · to ~32°F
Lowest temperature the foliage usually survives
Germination
~60%
Typical minimum germination rate

Growing timeline

When to plant and harvest lobeliaPlanting timeline for lobelia, relative to last frost: start indoors from 9 weeks before last frost to 1 week after last frost; grow from 1 week after last frost to 12 weeks after last frost; harvest from 12 weeks after last frost to 13 weeks after last frost.Start indoorsGrowLast frostTransplant
Start lobelia indoors ~10 weeks before transplanting 1 week after last frost; first harvest 12 weeks after last frost.
Seed to transplant
56-70 days
Outdoor planting
7 to 14 days vs frost
Propagation
Seed
Schedule anchor
Last Frost

Care & troubleshooting

No curated care & troubleshooting advice for lobelia yet. Our extension-sourced library currently focuses on common edible crops; we're expanding it over time.