Tips & Tricks

Planting and caring for delphinium - this is how it's done


If you are looking for a beautiful plant for your cottage garden, we can recommend the delphinium. Read here how you should plant and care for it.

Delphinium belongs to the buttercup family

The blue-flowered delphinium belongs to the buttercup family and is particularly widespread in the country gardens of our country. The hardy plant grows an average of 120 to 150 centimeters high (planting distance about 1 meter) and multiplies through self-sowing, insofar as the faded panicles are not removed too quickly by the gardener's hand.

Tip:

Only distribute the delphinium seeds loosely on the surface of the earth (if necessary press them lightly) and then do not cover them with soil, as this plant germinates light! For self-sowing, it is also sufficient if only two to three panicles remain on the stick, since the plant usually produces quite a few seeds.

Plant delphinium

A delphinium loves a sunny spot with a loamy, sandy bottom. You should enrich the soil with humus every year in autumn. Always work this well into the earth!

Tip:

You can supplement the autumnal humus intake with a compost in spring and fertilization with horn shavings after the first and possibly even after the second flower.

If the perennial plant becomes too large, you can use it every year in early spring by carefully dividing it with a spade at another location.

Delphinium plants also thrive excellently even in tubs. However, you have to make sure that there is no waterlogging inside the containers and that fertilization is repeated during the season if necessary.

Grooming delphiniums

»Cut back:

Between June and July the delphinium presents its imposing flower panicles for the first time. After flowering, you should shorten the stems to about 15 centimeters in height to ensure a second flowering phase, which then takes place in late summer - depending on the weather, around September to October.

Tip:

After the seeds have been ejected from the flowers, you can shorten the delphinium completely at ground level in autumn. However, the hollow stems of the plant should always be protected a little with both pruning.

»Irrigation:

On hot days and during long dry periods, the delphinium must also be watered sufficiently - if necessary, even twice a day. You can also support the watering of the delphinium by either spreading bark mulch around the plant or by shading, e.g. with easy-care ground covers.

»Winter protection:

The variants just mentioned also provide natural protection in winter. On extremely heavy frosty days, you should still cover the pruned shrub with a little brush.

If you have planted the delphinium in tubs, you should put them in a protected location in winter (also possible outdoors, e.g. patio shelter) so that the roots do not freeze to death.

»Control pests:

The snail is the biggest enemy of delphiniums, which is why it is best to distribute snail grain around the plant from time to time (already in spring) or alternatively set up snail traps. (Link tip: prevent snails - 3 tips)

Furthermore, cultivated forms of delphiniums that are resistant to mildew are available in the garden center today. If you want to largely rule out powdery mildew on the plants, you should grow precisely these varieties in the garden.