Learn about Dahlias

Dahlias are classified according to the shape of their flowers. Names such as ball, cactus, waterlily, giant dinner plate and anemone are relatively self-explanatory. Though the majority of dahlia bulbs are grown for their flowers, some varieties such as the Bishop series have the added bonus of bronze or chocolate brown foliage. Other flower types are also listed but of course, we provide you with descriptions to help you through the selection process. If this is not enough, you can always email us with any specific questions.

Cultivation:

Dahlias are supplied as dormant tubers from February through to May. Dahlia tubers delivered in February, March and April can be started off in trays or pots in a greenhouse (or similar), but if this is not appropriate dahlias can be stored in temperatures above 5°C and planted out, when the fear of frost has gone (this would normally be in May). Dahlias supplied in May can be planted straight outside.

To plant dahlias; when starting growth in pots or trays ensure the tuber is covered with good growing compost with only the crown of the dahlia slightly above the soil surface. Do not divide roots and ensure that the compost is kept moist but not wet.

When planting outside it is essential that the green shoots are kept free of slugs, as they will eat all the growth as it appears and is the most common reason why dahlias eventually fail to grow. For the taller varieties, you will need to provide plant supports as they grow.

Flowering:

When dahlias are flowering they should be fed with an all purpose plant food and all faded blooms should be removed to encourage continuous flowering. Dahlias will provide a fantastic show of flowers through the summer if they above instruction are followed.

Over wintering:

It used to be essential that all dahlia tubors were dug up from the garden and over wintered in frost-free areas, which can still be done. However, with the milder winters that we are now experiencing, dahlias can be left in the ground as long as a good covering of mulch is applied to them. If you do want to store them indoors then the tubers should be dug up after the autumn frost has turned the foliage black. Trim stems to about 10cm of the base and stand upside down for a week to allow moisture to drain out. Finally dust roots with green or yellow sulphur to prevent fungal infection and pack in dry peat for the winter. Store in a frost free place until spring arrives.

Buy Dahlias here