How to prune a rambler climbing rose: practical guide

Why prune a rambler climbing rose?

Rambler roses are wild, rampant climbers that grow in great streams and flower only once yearly, usually in June, laden with small flowers in clusters. They grow fast, can reach three to four meters, and produce much thin, flexible wood. They differ from once-flowering climber roses because they need much more pruning and are pruned differently.

Without pruning, ramblers become a tangle of thin shoots and dead wood that flowers no more. Pruning is about encouraging new growth where you want it and removing old wood.

Right after bloom: July

This is the crucial moment. Prune ramblers right after flowering, in July. This is quite different from once-flowering climbers which are pruned in spring.

As soon as flowering ends, usually mid-July, you begin pruning. You want all the flowering shoots - this year's thin, flexible shoots - cut back to roughly 10-20 cm from the main stems. This sounds harsh, but it works: you want these year-old shoots cut back so they grow next spring into side shoots laden with flowers.

Also remove all dead, discoloured or damaged wood. This is substantial: ramblers grow fast and much wood dies. Also remove all thin shoots (thinner than a pen) hanging all the way down. They never flower well.

Also remove one-third to one-half of the old, thick wood. Ramblers grow so fast you can remove much old wood without them weakening. This clears the base.

Summer after pruning: August-September

After July pruning your rambler grows fast in August-September. You want new shoots growing upward to be tied and spread. This matters because ramblers grow vertically - they seek light.

As they grow, tie them horizontally - use soft rope to attach them against your trellis or wall. Vertical shoots give few flowers. Horizontally spread shoots give full clusters. This is the difference between a full rambler and a sparse one.

Spring: preparation

In March, before your rambler grows, do light preparatory pruning. Remove winter-damaged shoots. Cut very long shoots that extend beyond where you want them back. But do not do much work - you do not want to remove much of this year's wood.

Check your tying work. Make sure all shoots are securely tied. Loose shoots will flap.

September to March: rest

September to March: your rambler does not grow much and you do not want much pruning. Only remove dead wood and check tying.

Feeding and health

Ramblers grow strongly and need heavy feeding to support all that growth. From May to August add feeding every two weeks. After bloom in July an extra feeding dose helps recovery and prepares for next season.

Diseased wood is very problematic with ramblers because it grows so fast. Diseases can spread quickly through the whole plant. Check regularly for powdery mildew, rust, and black spot. With problems, remove affected parts immediately. Also ensure good air circulation - do not tie your rambler too densely. Open airflow helps prevent disease.

Step-by-step

Step 1: Right after bloom in July

When flowering ends, usually mid-July, you begin pruning. This is the most crucial moment for ramblers.

Step 2: Cut back all thin flowering shoots

All thin, flexible shoots that grew this year and flowered, cut them back to 10-20 cm from the main stems. This feels harsh but generates full bloom next year.

Step 3: Remove dead wood

Remove much dead wood. This year ramblers grow fast and much wood dies. Remove everything grey, black, or hollow.

Step 4: Remove thin long shoots

All thin shoots (thinner than a pen) hanging all the way down, remove them. They flower poorly and look odd.

Step 5: Remove one-third of old wood

Ramblers grow so fast you can remove much old wood. Remove one-third to one-half of the thick, old wood. This clears the base.

Step 6: Tie new shoots horizontally in August

As new shoots grow in August-September, tie them horizontally. This generates full bloom. Vertical shoots give nothing.

Frequently asked questions

Why does my rambler flower less?

You probably do not cut hard enough after bloom, or you have little new wood. Make sure you really cut back all thin shoots in July. This forces new growth. Also feed in May-June. Well-known ramblers like 'Albertine' and 'Excelsa' grow stronger and need more pruning than you think.

How large does a rambler grow?

Ramblers grow three to four meters, sometimes more. They grow very fast. You can keep them smaller by cutting harder in July. If you remove much old wood, they regrow smaller. 'Paul's Himalayan Musk' can grow to six meters in ideal conditions.

Can I prune in spring instead of July?

No. This is the big difference with once-flowering climbers. Ramblers always prune right after bloom in July. If you prune in spring, you cut through the growth that would flower. This is critical - next year's bloom becomes weak.

My rambler looks too leggy and thick

This happens if you do not remove enough old wood. Next July really remove much old wood - maybe half the thick wood. This clears it. Also make sure your tying is good - ramblers grow in all directions and you must force them against your trellis.

Discover your own garden design

On gardenworld.app you can upload your front yard and see how a rambler climbing rose grows in it - with realistic growth and surrounding plantings. Plan your garden with climbers now.