List Of How Deep Should A Raised Garden Bed For Vegetables Ideas. Web this will allow you to grow alpines, poppies, sedums, and lavender as well as some herbs. Ideally you’d have at least another 18 inches (46 cm) of healthy soil underneath.
But in reality, how deep raised garden beds need to depend on a few factors. 8 to 12 inches is usually enough for your plants and vegetables to thrive. Many other plants, including perennials, compact shrubs, and veggies ideally need a minimum raised bed depth of 12in.
