Dhalia Novice needs some advice.
I grew my first Dahlia's from tubers this year. I started them in pots and put them into position in the garden in June (i think). They are now growing fantastically and they all have many flowers. They seem to me to be in their prime!
However, I understand that they now (or soon will need to be) either cut back and covered in mulch or removed from the garden cleaned and placed in saw dust or similar to protect from frost.
My question is do I cut them back now even though they are in full bloom or shall I leave them for a while longer? Secondly, if I heavily mulch the area where the tubers are planted would they have a chance of surviving the winter (I have no green house only a shed)? I live in Surrey where the weather is not too extreme! I was hoping to be able to mulch rather than dig up and store the Dahlia's.
Your advice/tips would be most welcome!
Edit: Sorry about the typo in the description heading!