Plant dahlias properly - for long-lasting flowering!

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Author: Monica Porter
Date Of Creation: 15 March 2021
Update Date: 1 July 2024
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How to Grow Dahlias - From Tubers to Gorgeous Blooms - A Complete Guide // Northlawn Flower Farm
Video: How to Grow Dahlias - From Tubers to Gorgeous Blooms - A Complete Guide // Northlawn Flower Farm

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Dahlias can be planted both in the field and in the pot

Plant dahlias properly - for long-lasting flowering!

A garden without dahlias or georgians, as the pretty summer bloomers are also called, is hardly conceivable. Only a few ornamental plants bloom so persistently and are as easy to care for as dahlias. However, it is a prerequisite that you replant the non-hardy dahlia tubers every year.

Next article Prefer dahlias - That's how it's done

Are dahlias only planted in the garden or in the pot?

Dahlias can be placed in the flower bed as well as in the pot or bucket on the balcony and terrace.

Small varieties of dahlia can even be planted in the balcony box.

Should dahlias be preferred?

Since dahlias are only allowed to be planted out in spring due to the risk of frost, it is worth their while to bring them to the house from March onwards. They then tend to form flowers.


Georgines can also be sowed. Sowing takes place on the windowsill in March. The seeds are kept light, warm and moderately moist until they rise. Then they are isolated or planted in individual pots.

The dahlias are not allowed to go out into the open until the end of May, as occasional night frosts occur until then. Dahlias in the pot you can already put on the terrace or the balcony. However, bring the tubs into the house when it is expected to reach minus temperatures during the night.

Which location do Georgines prefer?

Dahlias tolerate direct sunlight. In the shade, they thrive badly or do not bloom at all.

Georgines can be planted in the same place every year to make sure the soil gets enough nutrients.

Large dahlia varieties should be planted in a sheltered place, so that the heavy flower heads do not break off by the wind. Also helpful are supports, to which the shoots are connected with the flowers.

When is the best planting time?

Dahlia bulbs may be planted in prepared plant holes in the garden from the end of April. Drive dehydrated dahlias into the open air only after the ice saints, as the danger of night frosts is too great.


How should the soil be prepared?

Loosen the soil deeply. Enrich it with compost, cattle manure and horn shavings. The soil must be permeable to water, so that no waterlogging occurs. Compacted soil should be mixed with sand.

How are Georgines correctly planted?

Lift a planting hole that is about one and a half times as deep as the tubers are long. Place the dahlia tubers with the root neck up into the planting hole. New shoots grow out of the throat, not from the tubers.

Which planting distance must be observed?

The planting distance depends on the dahlia variety. As a rule of thumb, the distance should be half the later height of the dahlia.

When is the heyday of the dahlia?

Dahlias are blooming from July. The flowering period lasts well into the autumn. After the first frost, the flowering time is over. The flowering is stimulated by regular blooming of withered flowers.

How are dahlias multiplied?

The reproduction takes place via:

The tubers are divided at the end of April and immediately planted. Make sure you only put healthy pieces that have at least one eye.

Cut off cuttings from the tubers from January onwards and leave them in the house. For this you have to get the tubers out of the winter quarters in time.

The seed is sown in the house in March. It can be harvested in summer from the dahlias in the garden. However, the new dahlias are not always pure, but can have completely different colors and shapes.

Are dahlias hardy?

Georgians are not hardy. The plants are cut down in the fall and dug up. The tubers have to dry for some time before they are wintered in the house - preferably in the basement.

In very mild areas, dahlias can also be wintered outside when well protected from light frosts. But you have to expect losses, also because voles like to consume the tubers.

Are dahlias suitable for family gardens?

Dahlias are not only non-toxic, they are even edible. The leaves can be processed in the salad, the flowers make a pretty decoration for soups and other dishes. They can also be used to make a very delicate liqueur. The Aztecs used the dahlia tubers as food.

Dahlias can therefore be safely planted in the family garden or cared for on the balcony or terrace.

Are Georgines compatible with other ornamental plants?

Dahlias look very decorative with other summer flowers such as sunflowers, gladioli and cosmea. They are compatible with all other ornamental plants that have the same demands on location and soil.

Tips & Tricks

Dahlias are the national flowers of the state of Mexico. The long stems were already used by the Aztecs to store water. The Aztec name of the dahlia is "acocotli" and means water reservoir.