Selaginella martensii ‘Frosty Fern’ is a lush, moisture-loving tropical plant admired for its feathery, bright green foliage tipped with frosty white accents. Though commonly called a “fern,” it is actually a spikemoss, forming dense, cushiony mounds that bring a soft textural charm to terrariums, desktops, and humid indoor spaces.

Family: Selaginellaceae
Genus: Selaginella
Scientific Designation: Selaginella martensii ‘Frosty Fern’
Edible Fruit Bearing or Ornamental?: Ornamental
Soil Type: Peat-rich, well-draining potting mix with high moisture retention
Preferred Soil pH: 5.5 to 6.5 (slightly acidic)
Light Requirements: Bright, indirect light to moderate shade; avoid direct sun
Watering Requirements: Keep soil consistently moist; never allow to fully dry out
Hardiness Zone: USDA Zones 10 to 11 (indoor plant in Manitoba)
Height: 6 to 10 in
Spread: 8 to 12 in
Soil Drainage Requirements: Prefers evenly moist, lightly drained soil; avoid waterlogging but do not let dry
Fertilizer Recommendation: Feed monthly during spring–summer with a diluted balanced liquid fertilizer
Manitoba Specific Climate Notes: Strictly an indoor tropical; thrives in warm, humid rooms or terrariums. Keep away from drafts and dry furnace air—use a humidity tray or humidifier in winter.

Plant and pot may not be exactly as shown.