material, for example, decaying leaves, that you put around a plant to protect its base and its roots, to improve the quality of the soil or to stop weeds growing Topics Gardensc2覆蓋物,覆蓋料(用以保護植物根基、改善土質或防止雜草生長) Oxford Collocations DictionaryMulch is used after these nouns:- bark
Word Originmid 17th cent.: probably from dialect mulch ‘soft’ used as a noun, from Old English melsc, mylsc.