Acer tar spot

Time to act:

Jun

The fungus Rhytisma acerinum overwinters on fallen acer leaves, then infects the new spring foliage. The first signs are yellow leaf spots that turn into large shiny black blotches up to 1.5cm across. Severe cases can mean the leaves drop early, but the health of the tree won't suffer.

Symptoms

An outbreak of shiny black blotches, edged in a ring of yellow, disfigure acer leaves in early summer. This can lead them to fall prematurely.

Find it on

acers

Advertisement

Organic

Rake up and dispose of all fallen infected leaves.

Advertisement

Discover more ideas and inspiration

Related content

Clematis wilt

Hollyhock rust

Iris leaf spot

Powdery mildew

Related offers

Offer

Apple 'Ellison's Orange'

An excellent alternative to Cox, ‘Ellison’s Orange’ is much easier to grow and is self-fertile and does not require a pollinator. Buy a bare root tree for just £17.50 (saving £3) with this offer.

Order now

Offer

Save 15% on apple trees

Save 15 per cent on some of Monty's favourite apple varieties, including 'Herefordshire Russet', as featured in the October issue of BBC Gardeners' World Magazine.

Order now

HALF PRICE

Half-price acers

Enjoy spectacular foliage that changes colour throughout the seasons with this lovely collection of acers. You'll get three trees for just £14.99 (half price) with this offer.

Use code: RGW128

Order now