Raised Bed on firm surface
I have a small garden that is entirely brick paved and am looking to place 3 raised beds for shallow rooting vegetables. The raised beds I have received come complete with liners for a hard surface.
These liners (19" depth") have no holes, surely they will need some putting in, and have gravel/crocks around them to prevent blockage.
I want to leave them in place from year to year, how best can I prolong the life of the compost I am using/how long before I have to replace it?
Any tips gratefully received