How to grow great blue lobelia

When to plant great blue lobelia

Great blue lobelia is a clump-forming perennial that blooms from mid-summer into early fall (July to October) and may be divided in spring (NC State). A spring planting band aligns with the stated spring division window, though the page gives no explicit planting date.

Great Blue 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.