Tall Blue Lobelia. This perennial plant is 1-4 tall. Plants are very hardy especially compared to red lobelia varieties and will return year after year reliably.
Lobelia siphilitica Blue cardinal flower will reach a height of 07m and a spread of 04m after 2-5 years. OK Ill agreeLaguna Compact Blue with Eye isnt exactly a sexy name but this plant truly is awesome. Tall 60-90 cm and spreading 12-18 in.
Best in partial shade except in cool northern climates.
It will grow 2-3 tall in optimum conditions producing several stalks or spikes of dark blueviolet flowers. 30-45 cm this clump-forming Lobelia is a magnet for hummingbirds butterflies and beneficial insects. 6-12 tall x 12-24 spread. Beds and borders City Coastal CottageInformal.