Iris leaf spot

Time to act:

Jun, Jul, Aug, Mar, Apr, May, Sep, Oct, Nov

A fungal disease weakens the plant and can seriously reduce its flowering performance. The brown spots eventually grow together and develop grey centres. Infection is caused by air or water-borne spores entering the plant through damaged leaves. In wet weather the fungus spreads quickly. The spores are persistent and overwinter in the soil and on old leaves, stems and rhizomes.

Symptoms

Ugly brown speckles appear, merging to affect entire leaf in extreme cases.

Find it on

irises

Advertisement

Organic

Healthy plants are less likely to succumb to an attack. Clear away leaf debris lying on the ground around the plants. Take care not to damage leaves and stems unnecessarily.

Advertisement

Discover more ideas and inspiration

Related content

Iris reticulata

Hollyhock rust

How to prune apple trees in summer

Iris, ivy and fern pot display

Related offers

FREE P&P

Save £11.50 on irises

Buy a collection of five beautiful irises for just £16.50 (saving £11.50 on the usual price) while stocks last. You'll also get free p&p with this offer. Please enter our offer code at checkout to claim your discount.

Use code: gwdiris17

Order now

SAVE 20%

Save 20% on spring bulbs

Save 20 per cent on spring bulbs at Sarah Raven. Choose from a fantastic range of spring and early-summer flowering varieties including tulips, daffodils, irises and more.

Use code: GW17WAB

Order now

Offer

20 alliums for £5.99

Enjoy early-summer colour in borders and containers, with Allium 'Superglobe'. Buy a pack of 20 mixed bulbs for just £5.99 (normally £7.99) and also receive a free gift with your order.

Order now