Skill Level Easy Light Low-Medium Humidity High Soil / Substrate Quality soil, a few inches thick (roots fairly deep) Type Terrestrial Club Moss / Spike Moss (larger, spreading habit) Max Height 5-10" Placement Terrarium/vivarium — not for aquarium use; prune to control spread Origin Africa, Brazil Other Family Lycopodiaceae. Also known as Spike Moss. Grows larger and spreads more sporadically than Selaginella kraussiana — will fill an entire enclosure if left unpruned. Yellowing leaves indicate overwatering. Not an aquarium plant — submerging it completely will kill it. Care & Planting: Selaginella wallichii is a vigorous groundcover for terrarium-like setups and vivariums. Remove the cotton packing from the roots before planting into quality soil a few inches deep. Keep out of direct light and maintain consistent moisture with good humidity; prune regularly if you want to keep growth contained.