Mountain Aloe Plant Care
Aloe marlothii A.Berger
Updated · Sources · How we source care data
Aloe marlothii is a large, single-stemmed Southern African aloe of rocky places and open flat country, occasionally growing up to 6 metres (20 ft) tall.
Every 14–21 days
Bright indirect
50–85°F
40–60%
At a glance
How do you care for Mountain Aloe?
Water Mountain Aloe every 14–21 days, letting the top layer of soil dry out between waterings, and give it bright indirect light. It prefers temperatures of 50–85°F (10–29°C) and 40–60% humidity. Fertilize it every 6 months during the growing season. It is reported as toxic to pets, so keep it out of reach of pets.
What Is the Mountain Aloe?
Mountain Aloe (Aloe marlothii) belongs to the Asphodelaceae family within the Aloe genus. Mountain Aloe is also known as Cape Aloe, Bottle Brush Aloe.
Mountain Aloe displays a climbing, vining growth habit, reaching up to 1.5 ft tall with a spread of approximately 1.5 ft.
Leaf size: approximately 6 inches.
How Often Should You Water a Mountain Aloe?
Aloe marlothii requires watering every 14–21 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 14–21 days
Let soil partially dry between waterings
What Light Does the Mountain Aloe Need?
Mountain Aloe thrives in bright indirect light. Avoid placing Mountain Aloe in direct, harsh sunlight for extended periods, as this can scorch the foliage.
Light Requirement
Bright indirect
What Temperature and Humidity Does the Mountain Aloe Prefer?
Aloe marlothii grows best at temperatures of 50–85°F. Mountain Aloe prefers humidity levels of 40–60%.
Temperature
50–85°F
Humidity
40–60%
What Soil Mix Works Best for a Mountain Aloe?
Well-draining mix with perlite and peat. Good drainage is essential for Mountain Aloe to prevent waterlogging, which leads to root rot and fungal issues.
How Often Should You Fertilize a Mountain Aloe?
Feed Mountain Aloe 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 Propagate a Mountain Aloe?
Mountain Aloe can be propagated through stem cuttings or division. Similar propagation techniques also apply to aloe vera plant care, which shares the same genus.
Is the Mountain Aloe Toxic to Pets and Children?
Toxic (caution)
Reported as toxic in our plant data. Not verified by the ASPCA.
Toxic to cats and dogs
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 Mountain Aloe?
Mountain Aloe is susceptible to mealybugs, spider mites. 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 Mountain Aloe Need?
Mountain Aloe grows outdoors in USDA Zone 12a. It survives winters down to planting zone 12a. In cooler regions, grow Mountain Aloe as a houseplant or bring it indoors before the first frost.
Hardiness Zone
Zone 12a
Keep exploring plants
Mountain Aloe 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 Aloe genus — compare its care with other Aloe species on PlantoScan.
Aloe is part of the Asphodelaceae plant family — browse all Asphodelaceae genera and species.
Mountain Aloe thrives in bright light and direct sun — see other bright-light plants.
More Aloe Species
Other Aloe species in PlantoScan's care catalogue share similar watering, light, and soil preferences:
Sources
- Scientific name & taxonomy: Aloe marlothii A.Berger, family Asphodelaceae (first published in Bot. Jahrb. Syst. 38: 87 (1905)) — World Flora Online record, IPNI name record.
- Pet toxicity: Mountain Aloe is reported as toxic to pets in our plant data (not verified by the ASPCA), so treat it with caution. 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.
Identify Plants Like the
Mountain Aloe 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