Stenocactus multicostatus is a small cactus with stems with many narrow, acute, straight or wavy ribs, densely pleated together, giving a wrinkled look to their near globular shape.
It grows up to 6 cm tall, 6–10 cm wide. It has nearly 100 thin ribs around the outside, each with six to nine spines. The upper spines are wider, at 4–8 cm long, while the lower ones are shorter, at 5–15 mm long. The flower is white to purple, 2–5 cm in diameter with many stamens.
Like most cacti they're drought tolerant and need very little care and attention to grow well. Not enough sunlight and over-watering are common mistakes.
Plenty of sunshine will keep this cacti more than happy. In a glass room you may have to provide some shade during a hot summers day to prevent sunburn
Feed every 4 weeks with a high potassium fertilizer during summer
It is best grown in pots because of its wrinkled look, globular shape, small size, and low growth rate.
For watering cacti, the golden rule is to make sure the soil is completely dry before watering! This will stop the roots from rotting. It is advised to always use a pot with a drainage hole so that excess water can get drained out. If kept in a sunny area, you will need to water it once every week. If it is in a semi shaded or filtered light area, you might need to water it once in 2 weeks.
Cacti like soil that is well aerated and fast draining. You can fertilise the cactus in the summer months when it is in its growing season. During the winters it is best to cut back on any fertiliser and let the plant rest.