Baptisia is often called false indigo. I fail to see how remembering false indigo is easier than remembering baptisia (and I don’t care if you pronounce it bap-tees-ee-a, bapteesha, or bap-tis-ee-a). I suppose one could say calling baptisia false indigo ties it back to its historical use as a substitute for true indigo (Indigofera tinctoria) that was THE dye for blue fabric until synthetic dyes took over. You will also find baptisia listed as wild indigo sometimes.
Traditionally, we have used Baptisia australis as an ornamental. Its deep blue flowers and tough-as-nails disposition have earned it a place in gardens for a long, long time. Occasionally you might find one of the white flowered species, on rare occasions the bright yellow B. sphaerocarpa.
Two factors have changed how often these plants are used today, which is much more often than in the past. One is the increased interest in native plants. All baptisias are North American natives with four native to Indiana. Many gardeners want more natives in their landscapes and the baptisias provide beautiful tough plants for this. This beauty comes not only from the flowers but also from the attractive disease and insect free foliage and seed pods which turn dark gray/black when they ripen. The larger types act as shrubs in the landscape until late fall/early winter.
The other factor that has increased the use of baptisias is the hybridizing work done by multiple plant breeders. The first commonly available hybrid was ‘Purple Smoke’, a cross of B. australis and B. alba. This was just a chance seedling in the North Carolina Botanical Garden. Probably the second available hybrid was ‘Carolina Moonlight’, a yellow flowered plant from the same cross. Both cultivars present their flowers well above the foliage increasing their ornamental value.
It was not long before breeders saw the potential of this genus and work to create more hybrids went into overdrive. Dr. Jim Ault and the Chicago Botanic Garden introduced the PRAIRIEBLUES™ series and Walters Gardens introduced the DECADENCE® series by Hans Hansen a few years later. Both of these series involve multiple baptisia species. I should say the two I mention are not the only people working on baptisias. They do have the most hybrids on the market and the most readily available currently.
So many hybrid cultivars are available now but I can still remember when we first ordered ‘Purple Smoke’ for the Formal Garden. The plants were so small and cost so much it was like one almost felt guilty buying them. They were well worth the investment. Few perennials will give you so many months of ornamental value for so many years.
I also want to mention Baptisia sphaerocarpa ‘Screamin’ Yellow’ even though we don’t have it here at the IMA (though it and many of these may be available for purchase at our Greenhouse).This is a smaller plant than some of the hybrids but I love the name and the bright yellow flowers. The seedpods in this species turn tan and are round (sphaero – round/spherical, carpa – fruit). The cultivar is supposed to bloom heavier than the species.
Sources often say do not disturb baptisia once established, however my personal experience suggests you can dig and divide without too much worry. Admittedly I dealt with plain B. australis but that plant was dug then sat outside for a week or two before I got around to dividing it. I made a lot of plants from the mother-clump and all did fine. I would definitely do dividing in fall or early spring (don’t leave the plant laying around like I did) with my preference being spring as soon as you see shoots poking through the soil.
Below are some photos of our baptisias blooming in the Gardens right now. As you can see there is nothing false about them. They’re the real deal.