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Dahlia Tubers

Dahlia Tubers

Flowers until the first night frost.

A blue dahlia does not exist. Growers have been trying for two centuries, but the plant simply does not make the pigment, so everything from white to nearly black is possible and blue is not. They flower from July until it turns properly cold, and the more you cut, the more come.

401 varietiesflowers July to Octoberfrom €1,80

Flowering month
401 products

Hand-picked for quality and size.

If you want early flowering, start the tubers indoors in a pot from February or March and put them outside in mid-May. Plant the tuber 10 to 15 cm deep. Low kinds go about 30 cm apart, tall ones 50 to 60 cm. Full sun matters: at least six hours a day.

Keep cutting off spent flowers and the plant makes new ones. Give tall kinds a stake, and pinch out the top once when the plant is about 30 cm. That makes it fuller.

After the first night frost the leaves turn black. Then lift the tubers out of the ground, cut the stem back to about 10 cm, let them dry and store them cool and frost-free in a box with peat or sand.

Practical: Dahlias are not hardy here. Do not plant the tubers until mid-May, once the soil is above 10 degrees, and lift them after the first night frost. They range from 30 cm in a pot to a metre and a half at the back of the border. If you want to help bees with them, choose the kinds with an open heart.

At a glance: Dahlia Tubers

Variety Flowering months Height Planting depth Planting distance
Dahlia Sneezy july to october 45 cm 10 cm 50 cm
Dahlia Thomas A Edison july to october 80 cm 10 cm 50 cm
Dahlia Lady Liberty july to october 90 cm 10 cm 50 cm
Dahlia Anne Marie july to october 80 cm 10 cm 50 cm
Dahlia Yellow Don july to october 100 cm 10 cm 50 cm
Dahlia Tsuki no Shisha july to october 80 cm 10 cm 50 cm
Dahlia Burlesca july to october 45 cm 10 cm 50 cm
Dahlia Yellow Star july to october 80 cm 10 cm 50 cm
Dahlia Crazy Love july to october 80 cm 10 cm 50 cm
Dahlia Renoir july to october 50 cm 10 cm 50 cm
Dahlia Big Brother july to october 90 cm 10 cm 50 cm
Dahlia Saint Martin july to october 80 cm 10 cm 50 cm
Dahlia Lavender Ruffles july to october 80 cm 10 cm 50 cm
Dahlia White Swan july to october 80 cm 10 cm 50 cm
Dahlia Peaches and Cream july to october 80 cm 10 cm 50 cm
Dahlia Isas Darkness july to october 80 cm 10 cm 50 cm
Dahlia Bishop of York july to october 90 cm 10 cm 50 cm
Dahlia Gold Crown july to october 90 cm 10 cm 50 cm
Dahlia HS First Love july to october 45 cm 10 cm 50 cm
Dahlia Melody Fanfare july to october 80 cm 10 cm 50 cm
Dahlia Purple Gem july to october 90 cm 10 cm 50 cm
Dahlia White Star july to october 90 cm 10 cm 50 cm
Dahlia Arnhem july to october 50 cm 10 cm 50 cm
Dahlia Mary Eveline july to october 80 cm 10 cm 50 cm