Answer: sphagnum

AnswerCrossword Clue
SPHAGNUMPeat moss
SPHAGNUMMoss used by gardeners and surgeons
SPHAGNUMPeat moss prized by gardeners
SPHAGNUMMoss for potting plants
sphagnumany soft moss of the genus Sphagnum, occurring chiefly in bogs, used for potting and packing plants, for dressing wounds, etc.
sphagnuma grayish moss