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Spikes of 2ft high blue flowers appear from mid summer to early autumn. Leaves are light green and up to 4″ long. This hardy perennial can be short lived unless divided every other year. H&S 24″x12″
Lobelia siphilitica. This perennial produces racemes of 2-lipped violet-blue flowers in late summer and autumn. They are borne on 2-3 foot stalks.
These frost-hardy to somewhat frost-tender plants are best grown in well-drained, moist, light loam enriched with animal manure or compost. Most grow in sun or part-shade but resent wet conditions in winter. Prune after the first flush of flowers to encourage repeat flowering, and fertilize weekly with a liquid manure during the season.
Border, rock garden, wildflower/meadow, container, bog Attracts humming birds in suitable geographical locations.
Italics = data drawn from parent genus or speciesView Full Plant Finder Record