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Great Blue Lobelia

Lobelia Siphilitica

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Overview

Great Blue Lobelia (Lobelia siphilitica) is a striking perennial bestowing spires of vibrant indigo blue flowers. Ideal for adding vertical interest, this North American native thrives in USDA zones 4-9, prefers moist, well-draining soils, and partially shaded sites. It grows up to 2-3 feet tall and spreads about 1-1.5 feet wide. Blooming from late summer to early fall, it attracts butterflies and hummingbirds, enhancing garden biodiversity.

Sun Full, HalfWater Extra in Summer, MediumZones 4–9Climate Temperate
Great Blue Lobelia (Lobelia Siphilitica) — Ideal for adding vertical interest

Culture

Sun
Full, Half
Water
Extra in Summer, Medium
USDA zones
4–9

Shape & size

Classification

Family
Campanulaceae
Climate
Temperate

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Photos (59)

Great Blue Lobelia (Lobelia Siphilitica) — Ideal for adding vertical interest; it grows up to 2-3 feet tall and spreads about 1-1.5 feet wide, image 49
Great Blue Lobelia (Lobelia Siphilitica) — Blooming from late summer to early fall; scientifically known as Lobelia siphilitica, image 53
Great Blue Lobelia (Lobelia Siphilitica) — it attracts butterflies and hummingbirds; and other pollinators.<br><br>The foliage of this species is, image 54
Great Blue Lobelia (Lobelia Siphilitica) — this North American native thrives in USDA zones 4-9; this plant makes an eye-catching addition to any, image 50
Great Blue Lobelia (Lobelia Siphilitica) — and partially shaded sites; and its striking blooms add late-season color when many other plants are, image 51
Great Blue Lobelia (Lobelia Siphilitica) — It grows up to 2-3 feet tall and spreads about 1-1.5 feet wide; ideal for adding vertical interest, image 52
Great Blue Lobelia (Lobelia Siphilitica) — this plant makes an eye-catching addition to any garden with its deep blue to violet flowers; this North, image 59
Great Blue Lobelia (Lobelia Siphilitica) — scientifically known as Lobelia siphilitica; blooming from late summer to early fall, image 56
Great Blue Lobelia (Lobelia Siphilitica) — is a striking herbaceous perennial native to the eastern and central regions of the United States, image 57
Great Blue Lobelia (Lobelia Siphilitica) — Growing to an average height of 2 to 3 feet with a spread of about 1 to 1.5 feet; well-drained, rich, image 58
Great Blue Lobelia (Lobelia Siphilitica) — enhancing garden biodiversity; blue flowers in the garden, image 55

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