Quick Qu estions
What are the strange seedlings in my herb sowings?
Ron Dickinson, No inghamshire They appear to be fat hen ( Chenopodium album). This is a common weed in farmyard manure. As it’s so distinctive it’s easy to hand weed.
Can I divide dahlias in situ?
John Stephens, Isle of Wight While its usual to divide dahlias in spring just as new growth is showing, you could divide large clumps of established dahlias in the ground now by simply inserting a sharp spade down the middle. Fork the remainder of the clump out. Sulphur no longer has approval as a fungicidal dust for bulbs and tubers, so remove any partially severed tubers to reduce the risk of rot. Water the remaining clump.
How do vine weevils get into my closed porch?
Brenda Worth, Surrey Vine weevil can be introduced with plants brought into a porch or conservatory. Nurseries take measures to treat po ing composts to ensure no grubs are present, but it’s always possible for the odd pot to become infested. Adult weevils also enter through airbricks or vents. With airbricks, apply petroleum jelly around the inside edge to help prevent them entering.
How can I control asparagus beetle?
Sarah Beeton, by email Beetles and grubs feed on asparagus foliage and bark, causing extensive browning of foliage and weakening plants. With light infestations hand pick. It’s also a good idea to burn old stems at the end of the year. Plants can also be sprayed with the organic insecticide pyrethrum, such as Bug Clear Gun for Fruit & Veg, Defenders Bug Killer or ecofective Bug Killer.