Palm Moss: 1 Square Foot. Terrarium Moss, Live Moss, Palm Moss Great for Terrariums! Palm moss is a very unique moss that looks like little palm trees growing in a mound about 5 inches high and a hands width wide. It comes in nice mounds with little sprouts with a tuft on top. The sprouts are under an inch tall and look very much like tiny palm trees. This is untreated all natural moss, shipped directly to the customer. Has a shelf life of 2 to 3 weeks if kept refrigerated and misted. 1 Square Foot of moss.