Pruning roses looks more complicated than it is because different roses grow in different ways. A modern bush rose, a climber trained against a wall and a rambling rose covering an arch should not all be cut in exactly the same manner. The safest starting point is to identify the type of rose, remove anything dead or damaged, then prune for the shape and flowering habit of that particular plant.
For many established bush roses in the UK, the main prune is done in late winter or early spring as growth begins to stir. Climbing and rambling roses can need different timing, so do not copy a bush-rose routine blindly.
Get the tools right first
Use sharp, clean secateurs for normal stems and loppers or a pruning saw for older woody branches that are too thick for secateurs. Forcing a thick cane into small secateurs can crush the stem and damage the tool. Wear strong gloves and clothing that covers your forearms. Rose thorns can turn a simple ten-minute job into an unpleasant one. Before moving between plants, especially if a rose has shown signs of disease, clean the blades. A smooth cut heals more cleanly than a torn or crushed one.
Start with the three easy removals
Whatever the rose type, begin by removing wood that is:
- dead;
- damaged;
- diseased.
Dead stems are often brown or grey inside rather than pale green. If you are unsure, lightly scrape a tiny patch of outer bark with a fingernail. Living wood usually shows green beneath the surface. Cut damaged stems back to sound wood. If two branches rub against each other, remove the weaker or less useful one so the remaining stem is not repeatedly wounded. This first pass often transforms the plant before you even start shaping it.
Open up a crowded bush rose
For hybrid teas, floribundas and many other bush roses, remove very weak, spindly growth and stems that cross through the centre. Aim for an open plant with several strong stems rather than a congested bundle of thin shoots. An open framework improves access, makes later deadheading easier and allows air to move through the plant. Do not obsess over creating a mathematically perfect goblet shape. The rose needs a balanced framework, not identical spacing between every cane.
When shortening a stem, make a clean sloping cut no more than about 5mm above a healthy bud, angling down away from the bud as the RHS advises. Traditionally gardeners choose an outward-facing bud to encourage growth away from the centre. Leave only a small amount of stem above the bud: a long stub dies back, while a cut made too close can damage the bud itself.
How hard should you cut a bush rose?
The answer depends on the type, age and vigour of the plant. Strong established hybrid tea roses are commonly pruned fairly hard to encourage vigorous flowering shoots. Floribundas are often left a little taller and pruned less severely. Shrub and species roses may need only selective thinning and shortening rather than being cut down to a low framework every year. If you do not know the exact cultivar, avoid the temptation to reduce every stem drastically. Remove the obvious dead and congested material, shorten excessively long shoots and see how the rose responds over the season.
A neglected rose can often be renovated, but a staged approach is kinder to an old plant than removing most of its mature framework in one afternoon.
Pruning climbing roses
Climbing roses flower on side shoots that grow from long main stems. According to the RHS, routine pruning for climbers is usually from December to February; ramblers, by contrast, are often pruned after their summer flowering. Keep useful main stems, tie them into the support and arrange them as horizontally as practical. Training stems sideways encourages flowering shoots along more of their length. Remove dead, damaged and very old unproductive wood where appropriate. Then shorten flowered side shoots by roughly two-thirds as the RHS recommends, while preserving useful main stems that can be tied into the support.
Use soft ties and allow room for stems to thicken. Check old ties while you work; a forgotten tie can bite into a cane as it grows. If a climber has become a dense tangle, identify the main framework before cutting. Once a mature main stem has been removed, it cannot be put back.
Rambling roses are different
Ramblers commonly produce vigorous long stems and many flower on growth made in the previous season. They are often pruned after flowering rather than being treated exactly like repeat-flowering climbers. Remove dead or exhausted old stems when necessary and tie in strong new replacement shoots. Side growth can then be shortened to keep the plant within its allotted space. A mature rambler can cover a large structure, so renovation may take more than one season. Trying to force the whole plant back into shape at once can remove a huge amount of flowering wood.
Remove suckers properly
A sucker is vigorous growth arising from the rootstock below the graft on a grafted rose. It can look different from the desired rose and may eventually compete with it. First check where the shoot originates. Growth emerging above the graft is not necessarily a sucker simply because it looks vigorous. When a genuine sucker comes from below ground, expose its point of origin carefully and remove it cleanly at the source rather than repeatedly clipping it off several centimetres above the soil. If you are unsure whether a shoot is a sucker or part of the rose, identify it before cutting.
What to do with very old stems
Older stems sometimes become thick, dark and less productive. Removing one old stem low down can make room for strong replacement growth and gradually renew the plant. Do not assume every thick old cane must go in the same year. On a mature shrub or climber, removing a proportion of the oldest wood over several seasons maintains flowering while encouraging renewal. A pruning saw is safer than trying to chew through a thick stem with secateurs.
After pruning
Collect fallen leaves and diseased material from around the base of the plant. Do not leave obviously infected pruning debris tangled in the rose. Check ties and supports, especially on climbers. Then mulch around the plant if appropriate, keeping material clear of the stems themselves. Pruning is not a reason to overfeed. Follow the normal feeding schedule for the rose and the product you use.
As new shoots develop, look for a balanced response. If one cane grows far more vigorously than everything else, it can often be trained rather than immediately removed.
A simple approach if you are unsure
If you have inherited a rose and do not know what it is, start conservatively. Remove dead, damaged, diseased and crossing wood. Photograph the plant when it flowers and note whether it blooms once or repeatedly. Its growth and flowering habit will make identification easier. That is far safer than cutting an unknown climber or rambler back as though it were a hybrid tea. A good prune should leave the rose with a clear framework, healthy buds and room for the next season's growth. You do not need dozens of complicated rules; you need to know what kind of rose you are dealing with and make each cut for a reason.
Sources checked: RHS: general rose pruning, RHS: bush roses, and RHS: ramblers.