1st year after planting prune back hard to small shoots. Thereafter prune in Autumn winter after flowering and as colour fades. Or 'Garden care: In early or mid-spring cut back the flowered shoots to within 2.5cm (1in) of the old growth. After pruning apply a generous 5-7cm mulch of well-rotted garden compost or manure around the base of the plant.'
1st year after planting prune back hard to small shoots. Thereafter prune in Autumn winter after flowering and as colour fades. Or 'Garden care: In early or mid-spring cut back the flowered shoots to within 2.5cm (1in) of the old growth. After pruning apply a generous 5-7cm mulch of well-rotted garden compost or manure around the base of the plant.'