How to widen borders which are clay
Anyone got any top tips. I have 1 ft wide boarders and I want to widen them. They already have perennials popping up and bulbs. Do I dig out and replace the clay at the front of the boarder. How do I improve the soil in the existing boarders?? I can't dig more stuff in as it will pick up the soil height and rot my fence. I can't dig out as I have plants in that I put in last year. I improved it when I planted but now its as heavy as ever again!