Commonly known as false indigo, baptisia is a rugged native prairie plant that features tall spires of colorful blooms along with attractive blue-green foliage. The flowers resemble those of peas or beans, which are in the same plant family. Once the blooms have faded, they are followed by large clusters of showy seed pods that dry out as they mature and create a rattling noise in the breeze.
The Baptisia genus comprises more than 20 species of which blue false indigo (Baptisia australis) is the most common. Originally, most baptisia plants produced flowers in shades of blue. New hybrids brought additional colors, including shades of white, pink, yellow, red, and chocolate-brown, as well as bi-colored. There are also varieties with a more compact growth habit.
Baptisia is toxic to humans.
Baptisia Overview
Where to Plant Baptisia
Plant baptisia in a location with full sun and well-draining soil that is slightly acidic to neutral.
In small settings, baptisia looks good as a specimen. Its shrub-like appearance makes it a good choice for the back of a border. In larger landscapes, try a mass planting of baptisia. With its dense foliage, the plant is attractive not only during bloom time but all season long.
In addition to other native perennials, mid-sized upright ornamental grasses make good companion plants for baptisia.
How and When to Plant Baptisia
In southern locations with mild winters, you can plant baptisia in the fall. In northern climates, plant it in the spring after the danger of frost has passed.
To plant a baptisia that you purchased from a nursery, dig a hole about twice the diameter of the pot and about the same depth. Place the plant in the hole and fill in original soil to the top of the root ball. Gently tamp down the soil and water it well. Keep it well-watered for the first growing season to allow the plant to establish a strong root system.
The proper spacing depends on the variety. Plant taller species 3 to 4 feet apart and smaller varieties 18 to 30 inches apart.
Baptisia Care Tips
Like most native plants, baptisia requires little maintenance.
Light
Although the plant tolerates part shade, for the best bloom, plant it in full sun. In too much shade, the plant tends to get weak and leggy, and the stems might require staking.
Soil and Water
Other than planting baptisia in well-drained soil, the plant is undemanding in terms of soil requirements. The ideal soil pH is between 6.8 and 7.2.
Once the plant is established, it withstands droughts without much supplemental watering, thanks to its deep, extensive root system.
Temperature and Humidity
Wild indigo is a hardy plant that is quite adaptable to both warm and cool temperatures within its zone range. In a humid climate, however, proper air circulation is important, as the plant is prone to get fungal disease in wet or moist conditions.
Fertilizer
There is no need to fertilize the plants; in fact, an excess of nutrients leads to floppy growth.
Pruning
Cut the plant back to the ground after the first frost in fall or before new growth emerges in the spring. Some of the newer varieties grow large enough to resemble shrubs; trim them back to about a third of the original size after blooming to keep them looking tidy.
Potting and Repotting Baptisia
Because of its long taproot, baptisia is not suitable for being grown in containers.
Pests and Problems
Generally, baptisia is free of serious insect or disease problems. In humid or crowded conditions, the plant can get powdery mildew. The damage that weevils cause to the seeds is minor because it does not affect the appearance of the plant.
How to Propagate Baptisia
Propagating baptisia can be challenging for several reasons. Many of the newer hybrids, including ‘Lemon Meringue’, ‘Pink Lemonade’, ‘Blueberry Sundae’, and ‘Cherries Jubilee’, are protected by plant patents, and propagating them is prohibited.
Due to its deep taproot, the plant is not suitable to be divided. Getting the seeds to germinate is difficult because of the very hard seed coat. Plus, a plant started from seed may take three to four years to bloom.
Propagating baptisia from stem cuttings is the best option although it also requires proper timing and patience. Take a cutting of the new, soft growth in the spring. As the season progresses and the stems harden, the success rate drops significantly. Take a cutting about 6 inches long with at least two sets of leaves and one set of leaf nodes near the lower part of the cutting. Dip the cut end of the cutting in rooting hormone. Fill a 4-inch pot with damp potting mix and insert the cutting in the mix. Cover it with a plastic dome or a perforated plastic bag and keep it in a bright location but out of direct sunlight. Keep the soil evenly moist at all times. It takes about 8 weeks for the cutting to root. Remove the plastic cover and continue to let the cutting grow into a healthy little plant before transplanting it into the landscape.
Types of Baptisia
Blue False Indigo
Baptisia australis has blue-green foliage that is attractive even when not in bloom and, because of its size (3 to 4 feet tall), makes an excellent shrub substitute. Zone 3-9
Lesser Baptisia
Baptisia australis var. minor is a smaller version of blue false indigo, growing to only 2 feet tall and blooming slightly later. Zone 3-9
White False Indigo
Baptisia alba has white flowers in the spring that last for 4 to 6 weeks. It grows 2 to 4 feet tall and about 2 feet wide. The stems and stalks are charcoal gray. Zone 4-9
'Purple Smoke' Baptisia
This hybrid of B. australis var. aberrans and B. alba has smoky violet flowers held loosely above gray-green foliage. Zone 4-9
Yellow False Indigo
Baptisia sphaerocarpa, a slightly less winter-hardy Baptisia species, has bright yellow flowers and bright green foliage on upright stems. It reaches 2 to 3 feet in height and 2 to 4 feet in width. Zone 5-8
Baptisia Companion Plants
Black-Eyed Susan
Add a pool of sunshine to the garden with a mass planting of black-eyed Susan. From midsummer, these tough native plants bloom their golden heads off in sun or light shade and mix well with other perennials, annuals, and shrubs. Tall varieties look especially appropriate among shrubs, which in turn provide support. Add black-eyed Susans to wildflower meadows or native plant gardens for a naturalized look. Average soil is sufficient for black-eyed Susans, but it should be able to hold moisture fairly well. Zone 3-10
Coneflower
Easy to grow, attractive, and drawing lots of birds and butterflies, purple coneflower is a must in a pollinator garden. Valued for its large sturdy daisy-like flowers with dropping petals, this prairie native will spread easily in good soil and full sun. It is rarely bothered by serious pests or diseases. Allow it to spread so that you have at least a small stand of it. Let the flowers go to seed and the goldfinches will love you, coming to feast on the seeds daily. Coneflowers bloom from summer to fall. Zone 3-9
Perennial Geranium
One of the longest bloomers in the garden, hardy geranium bears small flowers for months at a time. It produces jewel-tone, saucer-shaped flowers and mounds of handsome, lobed foliage. It needs full sun, but otherwise, it is a tough and reliable plant, thriving in a wide range of soils. Perennial geraniums may form large colonies. Zone 3-9
Frequently Asked Questions
- What is the wildlife value of baptisia?Baptisia has high wildlife value. It attracts butterflies, bees, and other beneficial insects and serves as a larval host plant for different butterflies. Birds feed on the seeds and songbirds use the plant for cover.
Baptisia has high wildlife value. It attracts butterflies, bees, and other beneficial insects and serves as a larval host plant for different butterflies. Birds feed on the seeds and songbirds use the plant for cover.
- Do deer and rabbit eat baptisia?Deer usually leave the plant alone but might feed on it when there is no other food source around. Rabbits may feed on young plants so you might want to protect it with a chicken wire cloche for the first couple of years.
Deer usually leave the plant alone but might feed on it when there is no other food source around. Rabbits may feed on young plants so you might want to protect it with a chicken wire cloche for the first couple of years.