Lobelia siphilitica alba

Lobelia siphilitica 'Alba', commonly known as great blue lobelia 'Alba', is a clump-forming perennial with upright, lance-shaped green leaves forming dense, architectural foliage. In late summer it produces spikes of pure white flowers, creating a striking contrast along pond margins and in wet soils.

This cultivar is valued for its floral colour and contribution to wetland biodiversity, attracting pollinators such as bees and butterflies. Its upright, clump-forming habit and preference for consistently moist or shallowly submerged soil make it ideal for pond edges, bog gardens, and naturalistic water features.