Aloe marlothii Care and Propagation

Aloe marlothii or Mountain Aloe is a large succulent with a generally unbranched stem. This beautiful plant is topped by a rosette of gray-green to bluish-green leaves with a sharp tip and reddish-brown spines along the margins and randomly on both surfaces.

The leaves are up to 5 ft (1.5 m) long and 10” (25 cm) wide and the stem grows up to 10 ft (3 m) tall, usually covered by the old, withered leaves.

As it ages, it loses many of the spines on the surface of its leaves.

The specific epithet “marlothii” honors the South African botanist Rudolf Marloth (1855-1931), so it is also known as Marloth’s Aloe. Native to Botswana, Malawi, Mozambique, and South Africa.

A Quick Look at Their Characteristics:

They enjoy the indirect sun.

It is resistant to cold up to 19.4°F (-7ºC).

Up to 10 ft (3m) high and 10 ft (3m) wide (diameter).

Not suitable for outdoor cultivation in non-arid areas.

Reproduction by cuttings.

Ideal between 77°F and 95°F (25 ºC and 35 ºC).

Reduced watering than a normal aloe.

It is not toxic for humans or pets.

Relatively slow growth.

Aloe marlothii Care and Propagation

Care Aloe marlothii:

When growing aloes such as Mountain Aloe indoors, place your plants near a south- or southwest-facing window that receives plenty of bright, indirect light.

Provide light shade, especially during the hottest part of the day.

Aloes generally do not require fertilizer but can benefit from extra nutrients. These types of slow-growing aloes will remain several years on the same substrate so that a little bit of nourishment can make a difference.


Watering Aloe marlothii:

This aloe needs regular watering but is very tolerant of drought conditions for short periods.  As I have said on many occasions, water deeply, but only when the soil is completely dry.

Reduce watering during the winter months.

Where to Plant Aloe marlothii:

Plant aloes in well-drained soil specially formulated for cacti and other succulents or prepare your mix with large particles. Drainage is essential because too much moisture around the roots can cause root rot.

These plants are not particularly fast-growing, so they will be repotted every two years or so. I always recommend doing this when the roots cover the current pot.

aloe marlothii in the garden

Seedlings and Seeds Aloe marlothii:

Propagation of Aloe marlothii can be done using the tillers, cuttings, or seeds from a mature plant. Being a very prolific plant we will have a wide range of opportunities to propagate it.

Toxicity Aloe marlothii:

This succulent is not listed as toxic to people and pets.

Flowering Information:

Flowers are orange to bright red and appear in late fall and winter in a widely spreading branched panicle with up to 30 clusters.

aloe marlothii with flowers
About Henry Morgan

We are the Morgan family, Henry, and Morgan, both agronomists from the University of Michigan, where we met. We are experts in putting our hands in the soil and developing organic foods and improving production processes for decades. Likewise, we have worked for companies such as Mondelez International, BASF, Monsanto, etc. currently in our role as science writers for as well as advisors in promoting large scale food growing in urbanized areas. In this website, we share what we are most passionate about, gardening and farming. Enjoy and see real photos on our website.