balansaanswered grow question 4 years ago hey there. wellyes i have done it and it is called mulching and it prevents th medium from dehidratation and also prevents unwanted growth of the other plants from medium its more for open soil but ihave used it when ihad to leave my babies for 5 day and noone could water them so i mulched the pots and orevented avaporation and it staid moisted longer time but u should be awared of root rot and funguses happy growing!!!