Mountain firmoss (Huperzia appressa) is a low-growing, evergreen clubmoss found in alpine and subalpine regions. It has a creeping habit and small, scale-like leaves.
At-a-glance light, water, soil, and growing conditions from plant data
Partial Shade to Shade
25% intensity
Prefers bright, indirect light. Avoid direct sunlight, which can scorch its leaves.
Consistently Moist
50% intensity
Ensure the soil remains moist but never saturated. Allow the surface to dry slightly before watering again.
Acidic
50% intensity
Cool to Moderate
50% intensity
Ideal temperatures range from 15-20°C. Protect from frost and extreme heat, as it prefers cooler conditions.
Low
25% intensity
Feed sparingly during the growing season with a diluted balanced liquid fertilizer. Do not fertilize in winter.
Safety information from plant toxicity data
| Attribute | Value |
|---|---|
| Toxic for humans | No 0/5 intensity |
| Toxic for pets | No 0/5 intensity |
| Edible | No |
Key traits and growing stats from plant data
Watering, pruning, propagation, and repotting details from plant data
Keep the soil consistently moist but not waterlogged, particularly during the growing season. Allow the top centimeter of soil to dry slightly between waterings.
Reduce watering in winter, allowing the soil to dry out more between applications to prevent root rot.
Pruning is generally not required for Huperzia appressa. Remove any dead or damaged stems as needed to maintain appearance and health. Minimal intervention preserves the natural trailing habit.
Propagation is primarily done through spores, which is a slow and challenging process. Division of established plants can also be attempted in spring when new growth appears, carefully separating rosettes with roots.
Repot every 2-3 years or when the plant becomes root-bound, typically in spring. Use a well-draining, slightly acidic potting mix. Choose a pot that is only slightly larger than the current one to avoid overwatering.
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Monthly activity intensity for bloom and fruit across both hemispheres.
Flowering & fruiting calendar
Flowering & fruiting calendar
Photos of Mountain Firmoss (Huperzia appressa)
Common names and botanical synonyms
Botanical classification
| Rank | Name |
|---|---|
| Kingdom | Plantae |
| Division | Tracheophyta |
| Class | Lycopodiopsida |
| Order | Lycopodiales |
| Family | Lycopodiaceae |
| Genus | Huperzia |
| Species | Huperzia appressa |
Similar in genus Huperzia
Answers based on plant encyclopedia data
