
Boil 1kg rhubarb leaves in 2litres of water for 30 minutes.
Strain and add 125g of a biodegradable washing powder.
Mix until the powder is dissolved, leave to cool, put in a spray bottle and use as desired.
Must be fairly potent as it says to wait 2 weeks before picking produce, and wash well before eating.
Good for roses though

It,s from Family circle Australian home collections book on 'Enviromently Friendly Home Hints'. General Editor-Verna Simpson.