Your curious questions answered
For many gardeners, rose pruning is one of the most intimidating jobs of the year. Knowing where to cut, how much to remove, and whether you’re doing it correctly can feel overwhelming. Fortunately, roses are far tougher than they’re often given credit for. With a few basic techniques and an understanding of what your rose needs, pruning becomes a simple task that encourages healthy growth and beautiful blooms. Here are answers to some of the most common questions about pruning roses.
When do I prune my roses?
You can prune roses twice a year: once in summer and again in winter. Summer pruning is typically done to encourage more blooms by removing spent flowers. Winter pruning requires a more substantial haircut, targeting spindly branches thinner than a pencil, dead or blackened wood, crossing branches that rub together, and any growth in the centre of the plant that may restrict airflow.
Winter pruning times vary depending on your climate and the amount of frost your garden receives. In colder regions with frequent frosts, it’s best to delay pruning until late winter, just before new growth begins, as pruning too early can encourage tender shoots that are easily damaged by frost. In milder, frost-free areas, roses can often be pruned earlier in winter because there is less risk of cold damage. As a general rule, the colder your winter, the later you should prune.
How do I prune my roses correctly?
Looking at a bare-root rose can feel a little overwhelming. Prickly branches catch on clothes and gloves, and knowing where to start can seem like an impossible task. Once you begin, however, pruning can become surprisingly satisfying. The key things to look for are:
- Dead or blackened branches, including any that are beginning to turn black
- Rotten or diseased branches that feel soft, squishy or slimy to the touch
- Damaged, cracked or split branches
- Spindly branches that are thinner than a pencil
- Branches that cross over and rub against one another
- Old, woody branches with rough, warty growth
- Underground suckers or suckers just below the graft union
How hard can I prune a rose?
One simple way to approach pruning a rose bush is to use the 50:50 method, removing 50% of the growth from the top and 50% of the canes from the bottom. This helps create balanced growth and provides plenty of space for new flowering stems. If you’re hesitant to prune that hard, try removing just one-third of the top growth instead. This lighter prune will still help keep your roses healthy and productive.
How do I prune a standard rose?
Standard roses can be pruned much the same way as bush roses. Start at the top and work your way around the canopy, stepping back occasionally to check the shape and ensure your cuts remain balanced and even.
Can I prune roses in summer?
Yes, summer pruning is recommended for repeat-flowering roses. Flowers left on the bush will begin to form rose hips, which require a significant amount of the plant’s energy to produce. By removing spent blooms, you encourage the rose to direct that energy into producing more flowers instead.
To deadhead, locate a spent flower and make a cut a few centimetres below the bloom, just above a healthy leaf. Within four to six weeks, you can expect another flush of flowers to enjoy in the garden or pick for the vase.
Where do I make the cut?
Choose an outward-facing bud and make a clean cut at a 45° angle, approximately 5–10 mm above the bud. Outward-facing buds encourage new growth to develop away from the centre of the plant, creating the open, vase-shaped structure that is characteristic of a healthy rose bush. Inward-facing buds, on the other hand, direct growth into the centre of the plant, leading to crowded growth, crossing branches and reduced airflow.
Making the cut at a 45° angle also helps rain and dew run away from the bud, reducing the risk of fungal diseases and promoting healthy new growth.
Why won’t my rose bloom after pruning?
You’ve followed the pruning guides, made the right cuts and given your rose a tidy winter haircut, but it still isn’t flowering as expected. The good news is that pruning may not be the problem. In many cases, poor flowering is caused by environmental factors rather than incorrect pruning.
Common causes include insufficient sunlight, lack of water during dry periods, poor soil nutrition, or excessive nitrogen fertiliser, which can encourage leafy growth at the expense of flowers. Pests and diseases can also weaken the plant and reduce blooming performance.
Most roses require at least six hours of direct sunlight each day and benefit from regular feeding throughout the growing season. If your rose is healthy and receiving the right conditions, flowering should soon follow. Check for the following common issues:
- Insufficient sunlight – Most roses need at least six hours of direct sun each day to produce blooms.
- Nutrient deficiencies – Roses are heavy feeders and require regular fertilising. A lack of nutrients, particularly phosphorus and potassium, can reduce flowering.
- Too much nitrogen – High-nitrogen fertilisers encourage lush green growth but can suppress flower production.
- Water stress – Both drought and overwatering can affect flowering. Roses perform best with consistent moisture and well-drained soil.
- Poor soil quality – Compacted, waterlogged or nutrient-poor soils can limit root development and reduce the plant’s ability to produce flowers.
- Competition from nearby plants – Large shrubs, trees and vigorous perennials can compete with roses for sunlight, water and nutrients.
- Extreme temperatures – Prolonged heat, frost damage or strong winds can stress plants and cause buds to abort before opening.
- Pests and diseases – Problems such as aphids, thrips, black spot, powdery mildew and scale can weaken the plant and reduce flowering.
- Immature plants – Newly planted roses often spend their first season establishing roots before putting on a strong floral display.
- Rose hips left on the plant – If spent flowers are not removed from repeat-flowering varieties, the plant may direct energy into producing hips rather than new blooms.
