How to Grow Gayfeather (Liatris) From Seed

Liatris is a cold-hardy perennial, and its seeds actually need a cold, moist spell before they will sprout, so timing works with the season rather than against it. The easiest route in cold-winter areas is to direct sow in fall and let winter do the chilling for you, then watch for seedlings the following spring. If you would rather start indoors, give the seeds 4 to 6 weeks of cold, moist stratification in the refrigerator, sow in late winter about 8 to 10 weeks before your last frost, and move the plants out once the danger of frost has passed. Corms, if you grow those instead, go in the ground in spring.

Climate note: gardeners across the Upper Midwest and Northeast, places like Minnesota, Wisconsin, or upstate New York, can rely on fall sowing because winters there turn reliably cold. In the warm South and along the Gulf Coast, such as central Florida or south Texas, winters often are not cold enough, so chill the seeds in the fridge first and sow in fall or winter to spare the seedlings the brunt of summer heat.

Pick a spot in full sun with well-drained soil. Liatris is not fussy about fertility and actually prefers lean ground, but it will rot in heavy, soggy clay, so work in some coarse sand or grit if your soil tends to stay wet.

1. If you did not fall sow, stratify the seeds first. Mix them with a little damp sand or fold them into a moist paper towel, seal in a bag, and refrigerate for 4 to 6 weeks. 2. Sow shallow, only about 1/8 inch deep, and barely cover the seeds, since a little light helps them along. 3. Keep the soil evenly moist at around 65 to 70 degrees F. 4. Be patient. Germination is uneven and can take anywhere from 20 to 45 days. 5. Thin or transplant the seedlings to stand 12 to 15 inches apart so each plant has room for its clump of grassy leaves. 6. Water young plants about 1 inch a week until they are established and pushing out strong new growth.

Once a Liatris clump settles in, it mostly looks after itself. Water about an inch a week through the first season, then ease off, because established plants are genuinely drought tolerant and resent constant moisture. Skip the rich fertilizer. A thin spring topdressing of compost is plenty, and overfeeding only makes the spikes tall, soft, and prone to flopping.

Grow it in full sun to keep the stems sturdy. Plants in shade or rich soil tend to lean, and taller types in windy spots may appreciate a single discreet stake. By their third or fourth year the corms multiply into fat clumps that you can lift and divide in early spring to make more plants and keep the center vigorous. Leave the dried stems standing into fall and the seed heads will feed goldfinches.

Liatris loves the company of other sun-loving, drought-tolerant prairie plants, and its tall spikes contrast nicely with their rounder shapes.

• Purple coneflower (Echinacea): the classic prairie partner, same sun and lean soil, and together they keep butterflies busy for weeks.
• Black-eyed Susan (Rudbeckia): matching conditions and an overlapping bloom window of gold set against Liatris purple.
• Little bluestem or switchgrass: native grasses that echo the prairie look and help hold the tall spikes upright.
• Russian sage (Perovskia): airy, silvery, and just as happy in hot, dry ground.
• Yarrow (Achillea): tough, drought tolerant, and a flat-topped foil for the vertical blooms.

Skip pairing Liatris with thirsty, moisture-loving plants that need constantly damp soil, since the wet feet that keep them happy will rot its corms.

Liatris blooms from mid to late summer, and here is its party trick: each spike opens from the top down, so the show stretches on for weeks as the color travels down the stem. Snip spent spikes once they fade to keep the planting tidy, though you can leave the last flush standing for the birds.

For the vase, cut spikes when the top third of the flowers has just opened. They are a florist favorite and hold for a week or more in water. Liatris also dries beautifully as an everlasting flower: cut the stems, strip the lower leaves, and hang them upside down in a dry, airy spot until they stiffen.

In the garden, gayfeather is a natural for prairie plantings, pollinator beds, cottage borders, and meadow-style corners, where its vertical spikes play off mounded and daisy-shaped flowers. It is one of the best nectar plants you can offer for a mid to late summer pollinator garden, drawing monarchs and other butterflies, bumblebees, and native bees, while goldfinches work the seed heads later in the season. As a cut flower it earns its keep twice over, lasting well in fresh bouquets and drying into long-lived everlasting arrangements.

• Rotting corms or seedlings: almost always from wet, heavy soil. Plant in full sun with sharp drainage, amend clay with grit, and never let the ground stay soggy over winter.
• Floppy, leaning stems: usually too much shade or too rich a soil. Grow in full sun on lean ground, and stake tall types in exposed spots.
• Powdery mildew or rust on the leaves: shows up in crowded, humid plantings. Space plants 12 to 15 inches apart for airflow and water at the base rather than overhead.
• Seeds that never sprout: Liatris needs a cold spell to germinate. Fall sow, or chill the seeds in the fridge for 4 to 6 weeks before planting.