In addition to attracting hummingbirds, these make good companion plants to ferns and hostas ... There are several alternate names for blue false indigo including blue wild indigo, rattleweed ...

are a non-preferred plant for rabbits and deer, and attract butterflies. Baptisia australis, blue false indigo, forms a mound of bluish green foliage and blooms with spikes of one-inch blue flowers.

One to consider is Blue False Indigo. The first couple of years after planting Blue False Indigo, you won't see many flowers. It develops a deep root system that helps with drought tolerance.