To accompany our Instagram Stories on ‘Overwintering Dahlia Tubers’ here are my top key points Rule #1 is keep your Dahlias dry while they hibernate We don’t wash our Dahlia tubers until the Spring as we find this just discourages the likelihood that they will not freeze or rot. Rule #2 gentle humidity and ventilation…
ts really important to give your plants a chance ‘toughen up’ or ‘Harden off’ before planting out in the garden.
Its not just the change in temperature, they also have to get acclimatised to, lower humidity and increased air movement.
We move our plants from the greenhouse or polytunnel outside but under cold frames for 7-10 days.
Then for another period we will remove the cold frames but still give the plants some wind protection. A wall, close to the home or for us the side of the greenhouse is ideal.
Dahlia Planting Instructions, what to do with them when they arrive…I start mine in generous pots in March and early April (make sure the Tuber has room to put out roots and grow…However you have started your Dahlias you will need to pinch out the tips of the main shoot as they grow… Swan Cottage Flowers