Play NYT Connections Puzzle #667 Thu, Mar 6

Find groups of four related words Need hints?

Solve NYT Connections puzzle #667 - Group 16 words into 4 categories: DWINDLE, FADE, PETER, TAPER, PLANT, PRUNE, WATER, WEED, FLAT, MARY JANE, MULE, SLIDE, CASTLE, PAPER, PIPER, STONE.