1210

Iris leaf spot

A table displaying which months are best to sow, plant and harvest.
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
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Time to act

Do not Time to act in January

Do not Time to act in February

Do Time to act in March

Do Time to act in April

Do Time to act in May

Do Time to act in June

Do Time to act in July

Do Time to act in August

Do Time to act in September

Do Time to act in October

Do Time to act in November

Do not Time to act in December

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.

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Symptoms

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

Find it on

irises

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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.