In its natural habitat, Aloe hahnii grows in a sandy soil in grassland, on forest margins and sometimes in full shade in a low closed woodland. This makes it fairly adaptable in the garden, where it can be grown in the full sun or semi-shade as long as it is planted in well-drained, sandy soil.

Aloes can be propagated using both sexual (seeds) and asexual (cuttings) propagation methods. At Thohoyandou National Botanical Garden sexual propagation of Aloe hahnii is done using washed river sand. Sow seeds in a seedling tray filled with washed river sand and cover with a very thin layer of washed river sand, water the seeds to keep the medium moist. Seeds will germinate after 3-4 weeks. Once seeds have germinated transplanting should be done after 3 to 4 months into a growth medium mixture of 75% sand and 25% of potting soil. The transplanted seedling are placed in a nursery that receives full sun.

Asexual propagation of Aloe hahnii seems to be difficult, different growth media have been used with no success of rooting at Thohoyandou National Botanical Garden.

Aloe hahnii is prone to white scale and rust. Rust forms brown spots on leaves, it is caused by fungus and spoils the appearance of the plant, and it takes time to recover. White scale starts to appear in small numbers, but if not treated they will cover the entire plant and it might die. Treat white scale as soon as it is noticed, with insecticide. In general pests and diseases can be controlled by applying an appropriate pesticide or fungicide. To prevent plants becoming infested, use tools that are sterilized and isolate infested plants. Monitor pests constantly and control them when they are noticed. Isolating infested plants prevents them from infecting others.