How do I prune a rambling rose?
Pruning immediately after flowering rather than in winter, the renewal cut that takes whole canes out at the base, and the case for barely pruning a rambler at all.
- Difficulty
- intermediate
- Time
- 2 hr
- Read
- 5 min
- Safety
- caution
Short answer
Prune straight after it flowers, in mid to late summer. Cut about a third of the oldest canes right out at the base, tie in the new unflowered canes to replace them, and shorten the side shoots on canes you are keeping to two or three buds. Do not prune it in winter — that removes next summer's flowers.
Do this first
A rambler flowers once, on wood made the previous year, which sets both the timing and the method. Everything you cut in winter is a flower you were going to have. And because a rambler renews itself by throwing up fresh canes from the base rather than building a permanent framework, its pruning is about replacing old canes rather than spurring back a structure.
Safety
What you'll need
- Loppers
- Sharp secateurs
- Pruning saw for old basal canes
- Long gauntlet gloves, eye protection, long sleeves
- Soft ties
- A helper, on anything large (optional)
Step by step
- First decide whether it needs pruning at all.A rambler growing into a tree, over a large shed or along a boundary where it can do as it likes is best left alone apart from removing dead wood. Pruning ramblers is a job you take on for a plant in a position that requires control, not a job every rambler needs.
- Prune within a few weeks of the flowers finishing.Usually late July into August. Cutting now gives the plant the rest of the season to produce and ripen the canes that will flower next summer. Leaving it until autumn cuts into that time; leaving it until winter costs the display.
- Start by removing dead and diseased canes.On an old rambler this is often a barrowload of brittle brown wood buried inside the plant. Getting it out first makes everything else visible.
- Identify this year's new canes.They are the smooth, vigorous, often pale green stems that have grown from the base or low down and have not flowered. These are next year's display. Everything you do afterwards protects them.
- Cut about a third of the oldest flowered canes out at the base.Right down to ground level, or to a strong new shoot low on the cane. Cut it into sections as you go rather than trying to pull a five-metre cane out of the tangle in one piece.
- Tie in the new canes to fill the space.Spread them out and tie them in as near horizontal as the position allows, for the same reason as with a climber: a horizontal cane flowers along its length. Use soft ties in a figure of eight.
- Shorten the side shoots on retained canes to two or three buds.Where you are keeping an older cane because there is no replacement, cut the laterals coming off it back to a short spur. It will still flower from those.
- Shorten any cane that has outgrown the space.Take it back to a strong side shoot rather than cutting it to a blunt stub. You will lose the flowers on the part you remove, which is unavoidable.
- Clear the debris out from underneath.Rake out fallen leaves and cut wood. Ramblers make dense cover that traps everything, and the accumulated litter is where disease overwinters.
Tips
- The commonest reason a rambler needs a big annual fight is that it was planted somewhere too small. Moving the problem to an arch, a pergola or a scruffy tree solves it permanently.
- Ramblers grown into trees genuinely need no routine pruning. Choose the tree carefully — a mature apple or an old hawthorn can carry one; a small ornamental cherry cannot.
- Many ramblers produce excellent hips. If you want them, deadheading is exactly the wrong thing to do.
- Cut long canes into 600mm lengths as you remove them. Whole canes are almost impossible to handle and are the main way people get hurt doing this job.
Common mistakes
- Pruning in winter with everything else — The flower buds for next summer are already on the canes made this year. A winter cut removes them and the plant flowers poorly or not at all.
- Trimming the whole plant over like a hedge — It removes the tips of every cane, which is where much of the flowering wood is, and produces a dense outer shell with a dead tangle inside.
- Cutting out the new unflowered canes because they look untidy — Those are next year's flowers. Learn to recognise them before you start cutting.
If it doesn't work
Barely flowered this year
Cause: Pruned in winter, or trimmed all over — Fix: Prune only after flowering from now on, and only by removing whole old canes. It usually recovers fully in one season.
Flowers only at the very top of a wall or arch
Cause: Canes trained vertically and never renewed — Fix: Take out the oldest canes at the base after flowering and train the replacements sideways and low.
Dense dead tangle in the middle of the plant
Cause: Years of no renewal pruning — Fix: Renovate over two or three summers, removing a third of the oldest canes each year after flowering, rather than doing it all at once.
Powdery white coating on the leaves each summer
Cause: Mildew, which ramblers on dry walls are prone to — Fix: Water the root area deeply and mulch. Mildew on a rambler is nearly always a dry-root problem, not a wet-weather one.
Questions people ask
Can I cut a rambler right down to the ground?
Most ramblers tolerate it and regrow strongly, but you will get no flowers for a year, sometimes two, while the new canes grow and ripen. It is a legitimate reset for a plant that has become an impenetrable mess, best done in late winter and followed by feeding, mulching and training the regrowth properly.
When exactly should I prune it?
Within a few weeks of the flowers finishing, so usually late July or August. If you have missed that window, do the minimum — dead wood and anything genuinely in the way — and wait until after flowering next year.
Do ramblers need feeding?
Less than most roses; they are vigorous plants and many grow happily in poor ground. A mulch in spring is usually plenty, and a heavy nitrogen feed just produces more growth to manage.