Posted: 14/02/2014 at 08:06
Milly, the mild winter has kept lots of things flowering hasn't it?
I'd cut them back hard to outward facing buds about 8" from the base. Take out very spindly stems completely, also any that cross over - you're aiming for an open bowl-shape.
It sounds quite drastic but remember that 'growth follows the knife' so the harder back you cut them the better they will grow. Remembering that maxim, cut back the thinner stems a bit harder than the strong ones, then they'll even up.
Follow up with a sprinkling of slow release fertiliser such as Fish, Blood and Bone.