What soil depth is ideally required for a herb bed? I plan to move existing box hedging (is this a good idea) that is approx 9inches high and plant a variety of herbs. This is being dug out from existing gravel area with mixed hardcore.
Over ten years, Gerry Daly answered more than 5,000 gardening questions. His knowledge is based in science and practical experience, and by working on radio and television. Access to the advice database is open
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