The Aloe marlothii is an unbranched tree Aloe, and it can grow to 10 feet tall. Known as the Flat-Flowered Aloe because when it grows the flower stalk, it forms horizontal branches from which widely spaced flowers hang. It blooms in mid-winter, and the flowers are a dark orange.
This specimen did not bloom last year, so I’m hoping it will produce some flowers this winter. I’ve kept it on the patio, but it can take full sun, even in Phoenix. However, it needs frost protection, so I keep it in a pot rather than plant it in my garden. This plant is a summer grower and needs regular water during the hot months. It’s dormant in winter, so I keep it dry starting in November.
The brown spines on this Aloe appear on the leaf margins as well as here and there on the leaf. There doesn’t seem to be a pattern to the spines. The leaves are quite thick, and the plant is surprisingly heavy for its size. This Aloe species is also called the Mountain Aloe, as well as Bergaalwyn.