Posted: 30/06/2017 at 21:57
I have shallow poor soil in some beds. The dahlias are fed, when planted out the get some blood fish and bone. once growing I feed them say once a fortnight with a balanced fertiliser until the end of June when they are usually in flowe. After that I feed them with tomato fertiliser which feeds the flowers and the tubers but doesn't produce excessive leaf growt. Plus just a reminder to dead head to keep flower production going.