Plant Details

• Botanical NameSelaginella kraussiana ‘Frosty’ (aka ‘Variegata’); commonly sold as “Frosty Fern”.
• Common NameFrosty Fern; Spikemoss; Clubmoss (not a true fern).
• Size & Growth2–6 in tall; 8–12+ in spread; low, mat-forming habit with dense, fern-like texture.
• Hardiness ZonesUSDA 10–12 outdoors (frost-free). Commonly grown as a houseplant in cooler zones.
• Foliage TypeEvergreen spikemoss with scale-like leaves; creamy-white “frosted” tips in cool conditions.
• Bloom TimeNon-flowering (no showy blooms).
• Growth RateModerate to fast in warm, humid, evenly moist conditions.
• Light RequirementsBright to medium indirect light; avoid direct sun. Tolerates low light with slower, looser growth.
• Attracts PollinatorsNo — non-flowering and not attractive to pollinators.
• Indoor FriendlyExcellent houseplant; thrives in terrariums or bathrooms with high humidity.
• Container FriendlyYes — performs well in shallow pots, dish gardens, and enclosed containers.
• Deer ResistantGenerally unpalatable to deer where grown outdoors in mild climates.
• Pet WarningConsidered non-toxic to cats and dogs; ingestion may cause mild stomach upset. Keep out of reach to avoid nibbling.
• FragrantNo fragrance.
• Cut FlowerNot used as a cut flower; best enjoyed as a live plant or terrarium specimen.
• Grows Well WithGrows Well With Other humidity-loving shade plants: Fittonia (Nerve Plant), Adiantum (Maidenhair Fern), Peperomia, Calathea/Goeppertia, small mosses, and miniature ferns. Fittonia Maidenhair Fern Peperomia Calathea Mosses

Care Tips

• Planting InstructionsPlant at the same depth as in the nursery pot. Use a shallow container with drainage. In terrariums, provide a breathable layer (LECA or fine gravel) beneath a moisture-retentive substrate.
• Soil MoistureKeep evenly moist at all times; never allow to fully dry. Water when the top 0.5 in (1–1.5 cm) is just barely dry. Avoid waterlogging—empty saucers after watering.
• Soil TypeRich, airy, moisture-retentive mix: 50% peat or coco coir, 30–40% fine bark/perlite, 10–20% compost. Slightly acidic pH 5.5–6.5 is ideal.
• HumidityHigh humidity (60–80%). Use a humidifier, pebble tray, or enclosed terrarium. Avoid dry, heated airflow and drafts.
• Pruning InstructionsPinch soft tips to encourage a fuller mat. Remove any browned stems. Sterilize shears before trimming to prevent disease spread.
• Winter CareProtect from cold; keep 60–75°F (16–24°C). Provide brighter indirect light during short days. Reduce fertilization and avoid cold windowsills.
• Planting DepthSet the crown level with the substrate; do not bury stems. Leave room at the rim for even watering and airflow over the mat.
• FertilizationLight feeder: apply a balanced, half-strength liquid fertilizer every 4–6 weeks in spring–summer. Flush the pot periodically to prevent salt build-up; hold fertilizer in winter.
• Special CareUse distilled or rainwater if tap water is hard. Avoid letting the plant dry out. Watch for fungus gnats (from overly wet media) and mealybugs; improve airflow and adjust watering if issues arise.

Note: “Frosty Fern” is a Selaginella (spikemoss), not a true fern. Its pale, frosted tips are most pronounced in cooler conditions with bright, indirect light and steady humidity.