The following is a checklist of the most important tasks at the different times of the year.
(Follow the links to the Growing pages for more detailed explanations.)
The timing given is only a guide. Tasks may be tackled earlier or later depending on your local conditions and on variations in the seasons from year to year. Monitoring of your plants' progress will usually be your real guide.
During the months of dormancy the timing of tasks is usually more flexible and they can often be carried out over time.
June - July
Dig and divide your tubers unless your soil is well drained. The task can be spread out over weeks to suit your other priorities, the weather and your back!
Label your clumps/tubers as you go to ensure they don’t get mixed up.
Store lifted tubers over winter in a medium that will keep them from rotting or drying out.
If necessary, protect your tubers from rats with poison or some other method.
Place dahlias in pots under cover with enough moisture to not dry out.
Late winter is a good time to grow a green crop to be dug into the soil in Spring.
August - September
Check stored tubers from time to time for signs of rot or drying out. Discard rotted tubers.