Summer time:
Deadhead spent blooms as they fade in the summer, to encourage production of further flowers.
Throughout the year, prune whatever is necessary to maintain the plant's shape (but be sure to cut above the bud to encourage new shots / flowers)
Fall:
Prepare your Roses for Winter.
Trim longer stems to keep them from snapping in winter storms.
Crossing branches that could be damaged by rubbing together should also be cut back.
Remove any dead or diseased branches and foliage.
Remove any thin, weak growth.
Winter time:
Prepare your Roses for Spring time.
David Austin recommend pruning in late winter/early spring, when the first growth is beginning (better between January and February, it depends on the weather).
Carefully remove all the leaves left over the winter.
Prune by cutting 1/4 to 1/2 above an outward-facing bud eye (it depends on how tall you want the rose to be).
New stems grow in the direction of the bud and the goal is to encourage them to grow outward for nice shape and to keep the interior of the plants ventilated.
Sometime mature plants require to encourages vigorous new shoots from the base by cutting some of the older main stems back to the base.
Careful: Pruning rules for all types of roses
Cuts should be no more than 5mm above a bud.
Find and cut to an outward-facing bud if you want to encourage an open-centred shape.
Make cuts at a 45 degree angle sloping away from the bud, allowing water to run off.
If a dormant bud is not visible, cut to the appropriate height.
Remove any dead or diseased branches and foliage from the ground (to avoid the spread of disease).
Do not use leaves and cut branches for compost.
Clean your cutting tools well to prevent transferring disease to another plant.
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