Crassulas are amongst the easiest plants to cultivate, and this species, although once considered difficult and rare, is actually easy and rewarding to grow. The code to success is well-drained gritty soil with a low organic content, with good ventilation and bright light being essential.

Being a dwarf novelty plant, it is recommended to cultivate this species in a pot rather than in the open soil. A window sill receiving full sun is ideal, but they can also be grown outdoors in the full sun. Water sparsely throughout the year but only when the plant becomes soft to the touch. Although this species is resilient in cultivation, overwatering will result in obese and unattractive plants and also makes them more susceptible to fungal attacks which result in leaf scarring or rotting. Feeding is not necessary and will only cause lush growth which will ruin the characteristic nature of the plant.

Propagation is easiest from cuttings, especially leaf cuttings, at any time of the year which means they can be bulked up very easily. Remove the largest outermost leaves by pulling them away and to the side, tearing them gently away from the stem. A powdered rooting hormone for softwood cuttings can be applied at this point but is not at all essential. Allow the leaves to stand for a few hours so the wound can dry and heal. Insert them into a dry gritty growing medium with the bottom third of the leaf buried below the soil surface. Do not water the plants at this stage but rather keep the pot dry and in a bright situation out of direct sunlight where they will not get any water. After a week, they could receive a light sprinkling of water. Rooting should take place within 2 weeks. Once the leaf cuttings have visibly plumped up, move them to a sunny spot, and within a few months young plantlets will develop from the base of each leaf, eventually forming small rosettes.

Crassula tecta is also easily grown from seed which should be sown in autumn. Fresh seed has the highest viability and is thus recommended. Mix the dust-like seed with a small quantity of fine sand. Spread the sand evenly over the surface of the growing medium. Water immediately, preferably from below by standing the pot in a tray of water every few days. Keep the soil moist like this for the first month or so. Before long, tiny green plantlets should appear on the soil surface. Start to let the soil dry out between waterings. Soon the plants will bulk up, and if one achieves the ideal growing conditions, one can raise many thousands of plants like this. The use of a damping-off fungicide is advisable. Rather err on the side of caution and keep the plants too dry than too wet, this will result in neat, healthy and attractive plants. Even though they naturally receive rainfall only in winter, in cultivation they can be given water at any time of the year.