earth up

verb

(tr, adverb) to cover (part of a plant, esp the stem) with soil in order to protect from frost, light, etc
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Examples from the Web for earth up

  • When they have attained the height of 1-1/2 ft, tie the leaves lightly to a stake and earth-up the stem.