LOOK OUT FOR

Aphids

In the greenhouse, aphids can build up in vast numbers

when it’s warm. They suck sap

from plants, which distorts growth and can introduce

disease. Spray them with

organic insecticides made

from plant oils or fatty acids.

You can also buy garlic fumigant candles, which are safe to use in the greenhouse, and natural predators like parasitic wasps to keep

numbers down.