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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 4–9Type PerennialClimate Temperate

Great Blue Lobelia (Lobelia Siphilitica) — creating a dense floral display that is highly attractive to butterflies; perennial with blue blooms

Culture

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

Shape & size

Classification

Type: Perennial
Family: Campanulaceae
Climate: Temperate

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Photos (79)

Great Blue Lobelia (Lobelia Siphilitica) — enhancing garden biodiversity

Great Blue Lobelia (Lobelia Siphilitica) — Lobelia siphilitica prefers consistently moist to wet soils and thrives in full sun to part shade conditions

Great Blue Lobelia (Lobelia Siphilitica) — scientifically known as Lobelia siphilitica; blooming from late summer to early fall

Great Blue Lobelia (Lobelia Siphilitica) — Blooming from late summer to early fall; scientifically known as Lobelia siphilitica

Great Blue Lobelia (Lobelia Siphilitica) — measuring about 1 inch in length; is a striking herbaceous perennial native to the eastern and central regions of

Great Blue Lobelia (Lobelia Siphilitica) — It grows up to 2-3 feet tall and spreads about 1-1.5 feet wide

Great Blue Lobelia (Lobelia Siphilitica) — Blooming from late summer to early fall

Great Blue Lobelia (Lobelia Siphilitica) — Well-drained, rich soil will encourage optimal growth

Great Blue Lobelia (Lobelia Siphilitica) — is a striking herbaceous perennial native to the eastern and central regions of the United States

Great Blue Lobelia (Lobelia Siphilitica) — perennial with blue blooms

Great Blue Lobelia (Lobelia Siphilitica) — adding functional benefits to its ornamental appeal; perennial for full or half

Great Blue Lobelia (Lobelia Siphilitica) — creating a lush backdrop for the vivid blooms; they cling closely to upright

Great Blue Lobelia (Lobelia Siphilitica) — creating a lush backdrop for the vivid blooms

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 soil will

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

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) — Blooming from late summer to early fall; scientifically known as Lobelia siphilitica, image 53

Great Blue Lobelia (Lobelia Siphilitica) — Lobelia siphilitica prefers consistently moist to wet soils and thrives in full sun to part shade conditions; this

Great Blue Lobelia (Lobelia Siphilitica) — scientifically known as Lobelia siphilitica; blooming from late summer to early fall, image 56

Great Blue Lobelia (Lobelia Siphilitica) — This low-maintenance perennial is also relatively deer resistant

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 other pollinators.<br><br>The foliage of this species is lance-shaped and light to medium green; it attracts

Great Blue Lobelia (Lobelia Siphilitica) — and other pollinators.<br><br>The foliage of this species is lance-shaped and light to medium green

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

Photographs by 15 contributors

Aaron Carlson from Menomonie, WI, USA, CC BY-SA 2.0 · source
Karelj, CC BY-SA 3.0 · source
HLWolfe, CC BY-SA 4.0 · source
H. Zell, CC BY-SA 3.0 · source
SB_Johnny, CC BY-SA 3.0 · source
Doug McGrady from Warwick, RI, USA, CC BY 2.0 · source
David J. Stang, CC BY-SA 4.0 · source
Rept0n1x, CC BY-SA 3.0 · source
Alex Abair, CC BY 4.0 · source
Fritzflohrreynolds, CC BY-SA 3.0 · source
Nemracc, CC BY-SA 3.0 · source
Eric Hunt, CC BY-SA 4.0 · source
Krzysztof Ziarnek, Kenraiz, CC BY-SA 4.0 · source
Cephas, CC BY-SA 4.0 · source
Nadiatalent, CC BY-SA 4.0 · source

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