Protect your natural defence force! Ladybird larvae and adults have voracious appetites for aphids. Provide them with a place to hibernate and improve their survival rates. Site these towers in a sheltered spot near your precious plants to promote a fast response against sap-sucking garden enemies.
Lacewings are another great insect friend of the gardener who can make use of these shelters. Greenfly, blackfly - be very afraid!