Grimmia rigidissima Plant Care
Grimmia rigidissima Müll.Hal.
Updated · Sources · How we source care data
Racomitrium lanuginosum is a widespread species of moss found in montane and arctic tundra, the genus Racomitrium is found across the Northern and Southern hemispheres., however Racomitrium lanuginosum is only found in the Northern hemisphere. It grows as large mats on exposed rock and in boulder scree, particularly on acidic rocks.
Every 3–7 days
Medium indirect light
50–75°F
40–70%
At a glance
How do you care for Grimmia rigidissima?
Water Grimmia rigidissima every 3–7 days, letting the top layer of soil dry out between waterings, and give it medium indirect light. It prefers temperatures of 50–75°F (10–24°C) and 40–70% humidity.
What Is the Grimmia rigidissima?
Grimmia rigidissima (Grimmia rigidissima) belongs to the Grimmiaceae family within the Grimmia genus. Grimmia rigidissima is native to montane and arctic tundra, the genus Racomitrium is found across the Northern and Southern hemispheres.
Grimmia rigidissima displays a low mat-forming growth habit, reaching up to 0.1 ft tall with a spread of approximately 0.5 ft. Grimmia rigidissima produces tiny inconspicuous flowers.
Leaf size: approximately 0.1 inches.
How Often Should You Water a Grimmia rigidissima?
Grimmia rigidissima requires watering every 3–7 days. Allow the top layer of soil to dry between waterings to prevent root rot. Reduce watering frequency during winter when growth slows.
Watering Frequency
Every 3–7 days
Let soil partially dry between waterings
What Light Does the Grimmia rigidissima Need?
Grimmia rigidissima thrives in medium indirect light. Avoid placing Grimmia rigidissima in direct, harsh sunlight for extended periods, as this can scorch the foliage.
Light Requirement
Medium indirect light
What Temperature and Humidity Does the Grimmia rigidissima Prefer?
Grimmia rigidissima grows best at temperatures of 50–75°F. Grimmia rigidissima prefers humidity levels of 40–70%.
Temperature
50–75°F
Humidity
40–70%
What Soil Mix Works Best for a Grimmia rigidissima?
Well-draining sandy soil mix with peat moss and perlite. Good drainage is essential for Grimmia rigidissima to prevent waterlogging, which leads to root rot and fungal issues.
How Do You Repot a Grimmia rigidissima?
Repot every 1-2 years in early spring. Choose a pot one size larger than the current container, and ensure it has drainage holes to allow excess water to escape.
How Do You Propagate a Grimmia rigidissima?
Grimmia rigidissima can be propagated through spores, division of clumps. Similar propagation techniques also apply to star moss plant care, which shares the same genus.
Is the Grimmia rigidissima Toxic to Pets and Children?
Pet safety not verified
The ASPCA does not list Grimmia rigidissima, so we can't confirm whether it is safe for cats and dogs. Keep pets from chewing it as a precaution.
This is a general caution, not veterinary or medical advice. If your pet ate a plant, contact your vet or animal poison control.
See all plants toxic to cats and plants toxic to dogs.
What Pests and Diseases Affect the Grimmia rigidissima?
Grimmia rigidissima is susceptible to fungus gnats, spider mites, scale insects. Inspect the foliage regularly, especially along leaf undersides and stems. Treat infestations promptly with insecticidal soap or neem oil to prevent spread.
Yellow leaves, brown tips or drooping? See common plant problems and how to fix them.
What USDA Hardiness Zone Does the Grimmia rigidissima Need?
Grimmia rigidissima grows outdoors in USDA Zone 12a. It survives winters down to planting zone 12a. Grimmia rigidissima is native to montane and arctic tundra, the genus Racomitrium is found across the Northern and Southern hemispheres. In cooler regions, grow Grimmia rigidissima as a houseplant or bring it indoors before the first frost.
Hardiness Zone
Zone 12a
Keep exploring plants
Grimmia rigidissima is one of many species covered in the complete plant care and identification guide, which groups plants by genus, attribute, and popularity.
It belongs to the Grimmia genus — compare its care with other Grimmia species on PlantoScan.
Grimmia is part of the Grimmiaceae plant family — browse all Grimmiaceae genera and species.
Grimmia rigidissima thrives in bright light and direct sun — see other bright-light plants.
Related Plant Care Guides
Closely related plants with similar care requirements:
Sources
- Scientific name & taxonomy: Grimmia rigidissima Müll.Hal., family Grimmiaceae (first published in Flora 82: 455 1896) — World Flora Online record.
- Pet toxicity: Pet safety not verified: the ASPCA does not list Grimmia rigidissima, so we can't confirm whether it is safe for cats and dogs. Checked against the ASPCA plant list; any other toxicity note on this page comes from PlantoScan's plant database.
- Hardiness zone: USDA Zone 12a, calculated from the plant's minimum temperature.
- Care values(watering, light, temperature, humidity, soil, fertilizing): PlantoScan's plant database, filtered by automatic plausibility checks — values that fail them are hidden. How we source and check plant data.
Spotted a mistake? Email info@upvision.media with the page link — we check and correct reported errors.
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