The genus Astroloba is generally easy to propagate by seed, cuttings or offsets and by dividing clumps. Propagation of A. congesta can be done in autumn. The seed germination medium should be a mixture of 50% coarse river sand and 50% sifted compost, but is not limited to these media – other possible germination mixes suitable for growing succulents may be used.

The germination mix must be uniform and sieved to remove coarse particles and other objects that may limit germination. The removed coarse particles can be used at the bottom of the germination tray to aid drainage. Use sterilised trays that are shallow to allow adequate drainage and aeration. Spread the seeds evenly over the surface of the growth medium in the trays and cover the seeds with a fine layer of sand. Keep the trays moist until germination, in partial shade until hardening off time, when they are strong enough to be exposed to sunlight.

At the Karoo Desert National Botanical Garden (NBG), vegetative propagation is usually carried out in autumn and winter, under controlled conditions. Cuttings should be taken at the node with single shoots removed, and then dried for several days to a week before planting. This is often done with some succulents. It allows the wound at the node to heal and prevents exposure to soil-borne diseases that can affect cell division for root development. A soil mix with a high sand content that promotes good drainage would be suitable for A. congesta cuttings. Ideally, a mix of 60–70% coarse river sand and 30–40% sieved compost would be suitable.

Cutting trays can be placed and monitored in a lightly shaded propagator and watered with a fine mist to avoid high soil moisture levels, which can cause cuttings to rot. Propagation by cuttings or dividing a clump can follow similar approaches, but using the seed growing medium (with coarse compost) for rooted cuttings and divisions is recommended. Astroloba congesta grows well without fertilizer or other soil amendments. At the Karoo Desert NBG, an organic liquid fertilizer is usually applied to the plants once a month during the growing season, i.e., autumn and spring, and Astroloba species have grown well with this.

Under optimum conditions, this plant can live between 5 and 10 years. With proper care, you can enjoy its beauty for many seasons. The growth rate of Astroloba congesta is moderate. It usually reaches maturity within 2 to 3 years, making it a rewarding addition to your garden or home.

Understanding these life cycle stages will help you provide the right care at each stage. This knowledge will ensure that your Astroloba congesta will thrive beautifully and enhance your gardening experience.