How to make seedling trays last longer

It might seem impossible to reuse plastic seedling trays after one season if the drainage hole has become too large to hold any compost. I found a great way round it. Just pick upĀ any wide-leave plants growing among your grass and simply place one or two leaves at the bottom of each hole, or a little bit of moss would work just as well. This did the job for me and saved me having to buy another tray.