By Ladygardener
KENT,
United Kingdom 
GROW YOUR OWN VEGETABLES IN BAGS ON PATIO!!
Does anyone know should I add vermiculite or perlite to the compost to help with the moisture retention???? will put stones on the bottom of the bag but going out today I hope to buy the correct ingredients!!!! thanks for your help
25 Feb, 2011
i've never added anything to the growing medium. just water and i've never had a problem.
25 Feb, 2011