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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
Great Blue Lobelia (Lobelia Siphilitica) — It grows up to 2-3 feet tall and spreads about 1-1.5 feet wideGreat Blue Lobelia (Lobelia Siphilitica) — Ideal for adding vertical interestGreat Blue Lobelia (Lobelia Siphilitica) — this North American native thrives in USDA zones 4-9Great Blue Lobelia (Lobelia Siphilitica) — scientifically known as Lobelia siphiliticaGreat Blue Lobelia (Lobelia Siphilitica) — Blooming from late summer to early fallGreat Blue Lobelia (Lobelia Siphilitica) — enhancing garden biodiversity+52

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) — and partially shaded sites
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) — Ideal for adding vertical interest
Great Blue Lobelia (Lobelia Siphilitica) — this North American native thrives in USDA zones 4-9
Great Blue Lobelia (Lobelia Siphilitica) — scientifically known as Lobelia siphilitica
Great Blue Lobelia (Lobelia Siphilitica) — Blooming from late summer to early fall
Great Blue Lobelia (Lobelia Siphilitica) — enhancing garden biodiversity
Great Blue Lobelia (Lobelia Siphilitica) — it attracts butterflies and hummingbirds
Great Blue Lobelia (Lobelia Siphilitica) — measuring about 1 inch in length
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
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) — creating a dense floral display that is highly attractive to butterflies
Great Blue Lobelia (Lobelia Siphilitica) — They cling closely to upright
Great Blue Lobelia (Lobelia Siphilitica) — creating a lush backdrop for the vivid blooms
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) — and its striking blooms add late-season color when many other plants are fading
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) — blue flowers in the garden
Great Blue Lobelia (Lobelia Siphilitica) — Well-drained, rich soil will encourage optimal growth
Great Blue Lobelia (Lobelia Siphilitica) — This low-maintenance perennial is also relatively deer resistant
Great Blue Lobelia (Lobelia Siphilitica) — adding functional benefits to its ornamental appeal
Great Blue Lobelia (Lobelia Siphilitica) — this North American native thrives in USDA zones 4-9; this plant makes an eye-catching addition to any garden with
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

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