Mulch

1. (n.) Half-rotten straw, or any like substance strewn on the ground, as over the roots of plants, to protect from heat, drought, etc., and to preserve moisture.

2. (v. t.) To cover or dress with mulch.

Thesaurus Entries

backset, cultivate, culture, cut, delve, dig, dress, fallow, fertilize, force, harrow, hoe, list, plow, prune, rake, spade, thin, thin out, till, till the soil, weed, weed out, work