How to grow edging lobelia

When to plant edging lobelia

Edging lobelia performs best in cool weather but is sensitive to frost. UF/IFAS gives planting by calendar month and zone (for example May in zone 7, April in zone 8), and notes it ceases flowering when temperatures get too warm and recovers when they drop in early fall.

Edging Lobelia is timed by season rather than your frost dates, so the planting calendar does not generate ZIP-specific dates for it. Check the cited sources below to fine-tune for your area.