Why July Is a Critical Month for Rose Care: Tips to Protect Against Pests and Disease

As temperatures rise and roses hit their peak, gardening experts are urging Brits not to let their rose care routines slip in July.

According to plant experts at Gardening Express, this summer month is critical for keeping roses healthy, vibrant, and blooming for longer – but many gardeners risk causing long-term damage by forgetting to deadhead, feed, or inspect their plants regularly.

Neglected roses in July are especially prone to black spot, mildew, and pest infestations like aphids, which can quickly take hold in warm, dry conditions.

While roses are relatively hardy and can bounce back from a little neglect, letting problems build up in summer often leads to poor flowering and weak growth the following year. 

That’s why it’s important to treat July as a turning point – not just for maintaining current blooms, but for setting plants up for future success.

Many rose varieties, including climbing roses and repeat-flowering types, rely on proper feeding and pruning during this time to produce a strong second flush. Without attention now, gardeners may miss out on some of the best blooms of the season.

Nick Wood, horticulturalist at GardeningExpress.co.uk commented: “July is when roses really start to show off – but they’re also working hard, and that means they need more attention than usual. 

“The good news is a little care goes a long way. Whether you’re growing climbers or shrubs, now’s the time to step in with a little support.

“With roses, consistency is key. A bit of time spent now will keep your garden blooming into autumn – and make next year’s display even better.”

Gardening Express’s top rose care tips for July:

1. Deadhead regularly

Snip off faded flowers just above a healthy set of leaves to keep the plant looking tidy and encourage it to produce more blooms. This stops the rose from wasting energy on seed production and extends the flowering season well into late summer.

2. Feed after the first flush

Once the first wave of blooms has finished, give your roses a boost with a rose-specific or high-pottasium fertiliser. This helps fuel the next round of buds and supports strong, healthy stems and leaves, especially in repeat-flowering varieties.

3. Water deeply 

Roses need plenty of moisture in summer, especially in hot, dry spells. Water thoroughly once or twice a week at the base of the plant to encourage deep roots, rather than little and often. Avoid splashing the leaves to help prevent fungal diseases like mildew and black spot.

4. Watch for pests

Keep an eye out for common summer problems such as aphids (greenfly), black spot, rust, and powdery mildew. Early signs include distorted leaves, black blotches, or a fine white coating. Use a suitable treatment or organic method, and remove affected leaves if needed.

5. Prune lightly if needed

Use clean, sharp secateurs to trim back straggly or crossing stems that spoil the plant’s shape. This improves airflow and helps prevent disease. You can also cut back some taller growth to promote bushier flowering in the weeks ahead.

6. Mulch if not already done

Applying a generous layer of organic mulch like composted bark, well-rotted manure or garden compost helps retain moisture, suppress weeds and improve soil structure. It also keeps roots cool during hot spells and supports long-term plant health.

More information on rose care can be found on Gardening Express’s Knowledge Hub.