Lobelia siphilitica (Blue Cardinal Flower) Butterfly Weed In heavy clay soil plant

In heavy clay soil plant them 1" deep

This strong grower requires a light pruning in late winter to early spring to keep the dense rounded shape

Prefers average dry to medium wet

'Francee' flowers lavender in late July and into August

but will tolerate dry soil and part shade

Lobelia siphilitica (Blue Cardinal Flower) Butterfly Weed In heavy clay soil plantA bit more sun tolerant than the Red Lobelia, the blue spikes of this native flower appear in August and September with the same upright growth habit, but with a bushier shape. Growing 3 4' tall. The blue Lobelia likes a moist to average growing situation. Combines well with Eupatorium coelestinum, Chelone 'Hot Lips' and Carex plantaginea. Sunlight Requirements: Full Sun to Partial Shade USDA Hardiness Zones: 5 9