Quick Questions
Why has my hosta got mo led leaves? Tracey Rand, Bishop’s Stortford, Hertfordshire
Streaking or mo ling of foliage can be a sign of virus infection which is easily spread among plants by aphids. There’s no cure and plants need to be lifted and disposed of. In this case, however, I suspect cold damage. New foliage on hostas is very tender. Remove the most damaged and check over the coming weeks. If subsequent foliage is strong and healthy there’s nothing to worry about.
What do I do with my tulips now they’ve finished? Nicola Ferguson, by email
Larger bedding tulips don’t always flower well in their second year and many gardeners buy fresh bulbs. Where retained, deadhead and dig up as the foliage yellows. Clean soil and foliage as it withers and discard any damaged or diseased bulbs. Store in net bags or trays in a cool, airy place. Replant full-size bulbs in their flowering position in late autumn.
What’s eating my pea leaves? Sean Rice, by email
Notching of leaves is caused by pea weevil ( Sitona
lineatus). It’s usually of no consequence where plants are growing strongly, but in this dry year it’s essential to water regularly so plants outgrow the problem. There are several chemical bug killers available, including those based on pyrethrum.
Why are my peonies collapsing? Phil Chivers, by email
If stems shrivel and brown at the base, it’s probably peony wilt, a type of grey mould ( Botrytis paeoniae). It’s favoured by wet conditions. There are no fungicides available. Cut out and destroy all infected parts, even if this means cu ing below ground.