Annual
Edging Lobelia
Lobelia erinus
Varieties We Carry
Bella OceanoLobelia erinusTechno Dark BlueLobelia erinusHot Royal BlueLobelia erinus
Sizes & Pricing
1 galFrom$6.95
Fresh this week. Last restocked Jun 25.
LightFull Sun, Part Sun
WaterModerate
Mature size6-12 inches × 6-12 inches
About Edging Lobelia
Edging lobelia (Lobelia erinus) is a South African cool-season annual bearing masses of tiny two-lipped flowers in vivid blue, violet, white, and pink. In NE Florida it is planted in fall for winter and spring color, where it thrives in the mild, frost-light conditions; it declines with summer heat and is replaced with warm-season annuals. Starting at $6.95.
Plant details
- Bloom Season
- Spring, Fall, Winter
- Flower Color
- White, Purple, Blue
- Growth Rate
- Moderate
- Foliage
- Annual
- Soil
- Loam, Well-drained
Best planting months
Recommended forZone 9b · St. Augustine, FL
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Seasonal care
Bloom season. New foliage emerges.
Active growing season.
Bloom season. Foliage may begin to change or drop. Ideal planting window.
Bloom season. Dormant — drops foliage.
Care essentials
Light
Plant edging lobelia in full sun to part shade; in NE Florida's warm climate, afternoon shade extends the blooming season — choose a site with morning sun and filtered afternoon light for best performance.
Water
Keep soil consistently moist; lobelia dislikes drying out and will stop flowering in dry conditions — water regularly throughout the cool growing season and cut plants back after each flush of bloom to encourage reblooming.
Soil & Fertilizer
Grow in rich, fertile, well-drained soil; amend sandy NE Florida soil with compost before planting and apply a balanced water-soluble fertilizer every 2–3 weeks during the cool growing season to sustain continuous bloom.
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Common questions
Is Edging Lobelia a good plant for St. Augustine?
Edging Lobelia is a annual for Zone 9b coastal Florida gardens, reaching 6-12 inches × 6-12 inches.
Care information verified from
Last reviewed February 2026. Our care guidance comes from trusted horticulture sources and decades of helping St. Augustine gardeners. Conditions here can vary dramatically from one area to the next, so come ask us and we'll tailor it to your yard.