📁 覆盖物
Mulch in a garden is a layer of material on top of the bed which maintains soil moisture, moderates its temperature, and in some cases can help improve its texture and fertility. Sites with information explaining what mulch is, how to successfully mulch, and how to create a mulch are listed here.
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The Rhododendron, Camellia & Magnolia Group of the Royal Horticultural Society
http://www.rhodogroup-rhs.org/