Summer blooms
Dahlia’s popularity is rising—again
THE DAHLIA WAS DISCOVERED centuries ago and has been grown in Europe for more than 200 years. Its popularity in the United States has fluctuated over the years, but currently is on the rise.
This warm-season annual will bloom all summer long. The flowers are available in every color but blue, and flower styles range from single to double. Blooms can be as small as 2 inches and up to 12 inches across.
Previously only available as tubers, new seed-grown varieties are now also commonly available. Plants can grow from 12 inches to more than 36 inches tall depending on type. The seed-grown varieties tend to be on the shorter side and are grown more as a container plant. The taller varieties are typically planted in the garden or landscape and make an excellent cut flower.
Dahlias prefer full sun, but are tolerant of a little shade. They grow best in moist, but well drained soil. Remove spent flowers and fertilize monthly throughout the summer to encourage vigorous blooming. The dwarf seed-grown varieties may be sensitive to heat and have slow flower production until cooler weather returns. The taller tuber-grown varieties are more heat tolerant.
Neither the plants nor the tubers are winter hardy in Kentucky. Each fall you can lift and store the tubers once dormant. Replant them the following spring after the threat of frost has passed.
For the most diverse selections of dormant tubers, check reputable online sources. For a limited but nice selection, including dormant tubers and potted dahlias, check out your local garden center. Always check the tag for the mature height to ensure you are getting the type and size plant you want.
SHELLY NOLD is a horticulturist and owner of The Plant Kingdom. Send stories and ideas to her at The Plant Kingdom, 1000 E Market St., Louisville, KY 40206.
