Stenothyrsus ridleyi Plant Care
Stenothyrsus ridleyi C.B.Clarke
Updated · Sources · How we source care data
Stenothyrsus is a monotypic genus of flowering plants belonging to the family Acanthaceae. The only species is Stenothyrsus ridleyi.
Every 7–10 days
Bright indirect light
65–75°F
50–70%
At a glance
How do you care for Stenothyrsus ridleyi?
Water Stenothyrsus ridleyi every 7–10 days, letting the top layer of soil dry out between waterings, and give it bright indirect light. It prefers temperatures of 65–75°F (18–24°C) and 50–70% humidity. Fertilize it every 6 months during the growing season.
Where Is the Stenothyrsus ridleyi Native To?
What Is the Stenothyrsus ridleyi?
Stenothyrsus ridleyi (Stenothyrsus ridleyi) belongs to the Acanthaceae family within the Stenothyrsus genus. Stenothyrsus ridleyi is native to Perak in Peninsular Malaysia.
Stenothyrsus ridleyi displays a compact, clumping perennial growth habit, reaching up to 1.5 ft tall with a spread of approximately 1.5 ft. Stenothyrsus ridleyi produces small tubular flowers in shades of pink, purple, or white.
Leaf size: approximately 4 inches.
How Often Should You Water a Stenothyrsus ridleyi?
Stenothyrsus ridleyi requires watering every 7–10 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 7–10 days
Let soil partially dry between waterings
What Light Does the Stenothyrsus ridleyi Need?
Stenothyrsus ridleyi thrives in bright indirect light. Avoid placing Stenothyrsus ridleyi in direct, harsh sunlight for extended periods, as this can scorch the foliage.
Light Requirement
Bright indirect light
What Temperature and Humidity Does the Stenothyrsus ridleyi Prefer?
Stenothyrsus ridleyi grows best at temperatures of 65–75°F. Stenothyrsus ridleyi prefers humidity levels of 50–70%. A pebble tray or humidifier helps maintain adequate moisture around the plant.
Temperature
65–75°F
Humidity
50–70%
What Soil Mix Works Best for a Stenothyrsus ridleyi?
Loose, well-draining potting mix with added perlite for improved drainage. Good drainage is essential for Stenothyrsus ridleyi to prevent waterlogging, which leads to root rot and fungal issues.
How Often Should You Fertilize a Stenothyrsus ridleyi?
Feed Stenothyrsus ridleyi every 6 months during the growing season (spring and summer) with a balanced fertilizer diluted to the strength on the label.
Pause feeding in autumn and winter, when growth slows, and never fertilize dry soil — water first.
Fertilizing
Every 6 months
During the growing season
The PlantoScan app can remind you when to water and when to fertilize each plant.
How Do You Repot a Stenothyrsus ridleyi?
Repot every 1-2 years in 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 Stenothyrsus ridleyi?
Stenothyrsus ridleyi can be propagated through stem cuttings, division of offsets.
Is the Stenothyrsus ridleyi Toxic to Pets and Children?
Pet safety not verified
The ASPCA does not list Stenothyrsus ridleyi, 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 Stenothyrsus ridleyi?
Stenothyrsus ridleyi is susceptible to spider mites, aphids, mealybugs. 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 Stenothyrsus ridleyi Need?
Stenothyrsus ridleyi grows outdoors in USDA Zone 13b. It survives winters down to planting zone 13b. Stenothyrsus ridleyi is native to Perak in Peninsular Malaysia. In cooler regions, grow Stenothyrsus ridleyi as a houseplant or bring it indoors before the first frost.
Hardiness Zone
Zone 13b
Keep exploring plants
Stenothyrsus ridleyi 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 Stenothyrsus genus — compare its care with other Stenothyrsus species on PlantoScan.
Stenothyrsus is part of the Acanthaceae plant family — browse all Acanthaceae genera and species.
Stenothyrsus ridleyi 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: Stenothyrsus ridleyi C.B.Clarke, family Acanthaceae (first published in J. Asiat. Soc. Bengal, Pt. 2, Nat. Hist. 74: 651 (1908)) — World Flora Online record, IPNI name record.
- Pet toxicity: Pet safety not verified: the ASPCA does not list Stenothyrsus ridleyi, 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 13b, 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.
Identify Plants Like the
Stenothyrsus ridleyi Instantly
Scan any plant with your phone camera and get instant ID, care tips, water and fertilizer reminders, and health checks — all in one app.
Free
to download
iOS & Android
platforms
Light & dark
mode
100,000+
species