Posted: 04/03/2016 at 16:52
It's a question of timing as much as anything. I normally don't do anything till late April or early May for the reasons pansyface mentions. Too much rain. However, I did my borders last weekend after they'd thawed ( after the week of frosts ) and because it's been drier and slightly milder than usual. I also added extra compost and manure.
I may use a bit more B,F&B in late spring early summer if I think it's necessary and I will use a bit of tomato food for flowering plants later in the year . I grow my plants a bit harder than some people might though