Last year we received a beautiful yellow dahlia which flowered profusely. It overwintering in the garden shed and was very slow to grow this year. Eventually it flowered but strangely it has some orange flowers and some pale purple flowers. Any idea why this has happened? Thank you.
Photo would be helpful😊
Did you dig up the tuber(s) last year or was the plant left in its original pot until growth reappeared this year?
Do you have a picture from last year?