Overwinter dahlias

IF we are lucky enough to get a mild winter, dahlias that are left in the ground may survive unscathed if the soil is well draining and covered with a thick layer of mulch.

But to be sure of conserving your plants for next year it is best to dig them up and bring them indoors.

Up they come

In early autumn, when the first frost blackens the foliage, cut back the plants to about 30cm. Use a fork to carefully dig up the tubers, trying not to damage them.

Next take the tubers to a frost-free

Stop the rot

IF you cannot collect rainwater, to use leftover tea water potted azaleas and other houseplants to keep them healthy. shed and place them in a tray upside down so the hollow stems can drain. Ensure they are out of direct sunlight.

After a couple of weeks, lightly brush off any dried soil that is sticking to the tubers and dust them with yellow sulphur to discourage mould and mildew.

To stop them shrivelling or drying out while in storage, pack upright in trays of slightly damp peat. Regularly check the dahlia tubers over the winter for signs of rot and remove any that are showing signs of deterioration before they infect others. Cut out any affected areas with a clean, sharp knife then dust them with sulphur powder.

Spring into action

Dormant tubers can be revived in spring by planting them in pots.

Any shoots can be used for cuttings. These should be grown on in individual pots and planted out in May and June.

Dry tubers should be OK to plant in the ground by late April. Then stand back and await the summer show.