How to Make a Rock Garden - Better Homes & Gardens
https://www.bhg.com/how-to-make-a-rock-garden-7487031
May 25, 2023 · Another option found in many rock gardens is the use of a thick layer of sand and/or gravel. Alpine, xeriscape, Japanese, and gravel gardens often use upwards of 6 inches of inorganic fill to create a water-permeable barrier too thick for most seeds to grow. The addition of rock, sand, and gravel as a weed barrier does increase the price of ...
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