Rhododendron leaf spot

Time to act:

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

This disease, caused by the fungus Glomerella cingulata, results in rounded spots on the leaves. Although it's unsightly, leaf spot is only a significant problem on poorly growing or unhealthy plants, which might end up dropping a substantial number of leaves.

Symptoms

A fungal attack causes an outbreak of spots on the leaves. The dark marks are often surrounded by a pinkish-purple ring.

Find it on

rhododendrons, azaleas

Advertisement

Organic

Promptly remove and destroy all infected leaves, both on the plant and on the ground. Don't put them on the compost heap. Also improve the growing conditions - add a mulch of well-rotted compost, and regularly feed and water. Keep deadheading.

Advertisement

Discover more ideas and inspiration

Related content

Rose black spot

Powdery mildew

Rose powdery mildew

How to prune a climbing rose

Related offers

HALF PRICE

Flowering patio shrubs

Save 50 per cent when you buy a collection of three low-maintenance patio shrubs for just £22.50 (normally £15 each). Collection includes a dwarf hyrdangea, daphne and escallonia.

Order now

Offer

Save on hardenbergia

Autumn is the ideal time to plant hardy climbers, like beautiful hardenbergia (lilac vine). Buy a pack of three mauve or three white for just £18, or one of each (two plants) for £15 at Hayloft.

Order now

HALF PRICE

Winter-flowering Abeliophyllum

Flowering in late winter to early spring, this relative of forsythia will produce delicate, light pink flowers with a delicious rose and orange blossom scent. Buy one for £14, or save 50 per cent when you buy three for just £21.

Order now