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Dahlia

Dahlia

The garden favorite dahlia is known for its variety of flower shapes. The annual is classified into 14 groups based on blossom type. They come in all colors except the elusive blue. Dahlia plants can be used year after year with only a bit of extra effort because their tuberous roots can be dug up in the fall and replanted in the spring. 

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Light:

Sun

Type:

Height:

From 1 to 8 feet

Width:

1 to 2 feet

Flower Color:

Foliage Color:

Seasonal Features:

Problem Solvers:

Zones:

8-10

Propagation

Colorful Combinations

Dahlias bloom nonstop summer until frost in a rainbow of colors. Cut flowers last several days, making them excellent for bouquets. A few of the most exciting flower types include the cactus form with its needlelike petals and the ball (or pompom) types that have small ball-like blossoms. Dinner plate dahlias are recognized for their blooms the size of a dinner plate. And some cultivars have burgundy foliage that provides a pretty backdrop for the showy flowers.

Watch this video to learn how to prolong the vase life of dahlias.

Dahlia Care Must-Knows

Dahlias grow in the ground or containers. If you purchase them as bare-root tubers, start them indoors early in the spring for a head start on the growing season. To do this: Plant the tubers in a pot of well-drained potting soil about six weeks before the last frost; place the pots in a sunny window and keep warm. Keep the soil evenly moist, but not wet to avoid rot. Once the foliage emerges and the danger of frost has passed, plant in the ground.

When choosing where to use dahlias in the landscape, consider the mature height of the plant. Some large varieties, including the dinner plate dahlia, require staking or tall neighbors to support the heavy flowers. Dwarf and small varieties don't require additional support.

Using a low nitrogen fertilizer further increase their prolific blossoms. Full sun ensures upright plants, can prevent the need for staking, and allows for the best habit and display of blossoms. If planted in shadier areas, the foliage tends to look greener than burgundy.

If you are planning on saving your dahlias for the next growing season, take these steps: About two weeks after the first frost has hit and the foliage has dropped, cut stems off at the ground and dig up the tubers. Be sure to dig carefully because the tubers can be fragile and may break into pieces. Wash excess dirt from roots and allow to dry. Store tubers in slightly damp peat moss or sawdust in a cool, dark place. Come spring, you will have tubers ready to plant for another year of showy flowers.

Find information on cutting, growing, and arranging dahlias here.

More Varieties of Dahlia

'Arabian Night' Dahlia

'Arabian Night' offers deep maroon, almost black, blooms that open several to a stem and grows 3 feet tall. Zones 8-10

'Bishop of Llandaff' Dahlia

This variety bears dark fiery-red blooms shaped like small peonies that glow against deep chocolate foliage. This prize-winning dahlia grows to 50 inches tall. Zones 8-10

'Chinese Lantern' Dahlia

Dahlia 'Chinese Lantern' bears huge, bittersweet orange blooms that appear abundantly on branching stems from midsummer to fall. It grows 3 to 4 feet tall. Zones 8-10

'Duet' Dahlia

This type of dahlia features medium-size red blooms tipped in white. It grows 3 feet tall. Zones 8-10

'Envy' Dahlia

Dahlia 'Envy' offers large, deep red blooms. It grows 5 feet tall. Zones 8-10

'Jessica' Dahlia

'Jessica' is a cactus-type dahlia that unfurls butter-yellow petals tipped in flame red. It grows 5 feet tall. Zones 8-10

'Pam Howden' Dahlia

Dahlia 'Pam Howden' is an abundantly blooming variety that features 2- to 4-inch-wide water-lily style flowers in an orange-yellow-coral blend. The plant grows 4 feet tall. Zones 8-10

'Penn's Gift' Dahlia

'Penn's Gift' is known for its large pink flowers that can reach more than 1 foot across. It grows 5 feet tall. Zones 8-10

'Radar' Dahlia

Dahlia 'Radar' is a large, informal decorative-type that features deep plum-purple petals tipped in white. It grows 5 feet tall. Zones 8-10

'SB's Sunny' Dahlia

Dahlia 'SB's Sunny' is an award-winning variety that features layers of lemon yellow petals tightly clustered on a round, pom-pom flower. It grows 4 feet tall. Zones 8-10

'Sharon Ann' Dahlia

This variety of Dahlia is a semicactus-type dahlia with spiky light lavender petals unfolding from a creamy white center. It grows 5 feet tall. Zones 8-10

Star Gazer Series Dahlia

Dahlia Star Gazer Series is a dwarf, cactus-flowered dahlia that produces spiky blooms in nine colors, including golds, yellows, deep reds, fuchsia, lavender, and bicolors with white. The multibranching plants grow 16 inches tall. Zones 8-10

'Suffolk Punch' Dahlia

This type offers cherry-red flowers with an iridescent pink overtone bloom on dark stems. It grows 4 feet tall. Zones 8-10

'Survivor' Dahlia

Dahlia 'Survivor' is a large decorative type that features deep rose-pink blooms that can reach 12 inches across. It grows 5 feet tall. Zones 8-10

'Victory Dwarf' Dahlia

Dahlia 'Victory Dwarf' is a small, single-flowered variety that produces gemlike blooms in red, orange, yellow, and white. It grows to 8 inches tall. Zones 8-10

'White Fawn' Dahlia

'White Fawn' offers pristine white blooms, up to 4 inches across, on a plant that grows 4 feet tall. Zones 8-10

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