Rose black spot

Rose black spot

Time to act:

Jan, Feb, Mar, Apr, May, Jun, Jul, Aug, Sep, Oct, Nov, Dec

Aptly named black spot is a fungus that causes dark spotting on rose leaves and stems. Eventually, leaves turn yellow and drop off before autumn. Spores overwinter on the fallen leaves and re-infect the plant in spring when new foliage appears. Plants can be weakened by recurrent attacks, especially if they occur early in the season.

Symptoms

Leaves are disfigured by poorly defined purple-brownish-black blotches. The leaves then turn yellow and fall. Stems might also be affected.

Find it on

roses

Advertisement

Organic

Pick up and destroy fallen leaves. When pruning, cut out any stems with black spot on. In late-winter, spread a thick layer of mulch around the base of the affected plant to prevent rain splashing soil-borne spores on to new spring growth. Grow rose varieties that are resistant to black spot – these are suggested in the catalogues of specialist rose growers.

Chemical

Spray against black spot with a fungicide. Follow the instructions, treating the new foliage in early spring, with further sprayings at regular intervals through the season.

Advertisement

Discover more ideas and inspiration

Related content

Rose powdery mildew

How to prune a climbing rose

Clematis wilt

Reversion

Related offers

SAVE 20%

Subscriber only content

Save at Blooming Direct

Save 20 per cent on everything at Blooming Direct, including roses, shrubs, grow-your-own fruit and veg, bedding, bulbs, a range of accessories and more.

Unlock now

Offer

Save £6 on cotinus

Pick up a perfect cotinus collection, comprising three interesting varieties - 'Grace', 'Royal Purple' and 'Golden Spirit' - from Hayloft. Buy three plants for £18, or save £6 when you buy six for just £30.

Order now

Offer

Daphne and camellia

Fill your spring garden with early colour and scent with a beautiful Daphne mezereum and Camellia 'Fairy Blush'. Buy either individually, or save £11 on the collection.

Order now