Astrophytum asterias sand dollar
(This plant comes in a 2.5 inch pot. You will receive a very similar plant to the one in the picture. It may or may not be blooming at the time of your purchase. The plant is shipped in its pot to prevent any damage to the roots).
Astrophytum asterias also known as Sand Dollar Cactus is a summer grower species relatively easy to grow although grows quite slowly.
Watering: Requires careful watering to keep plant compact. Water sparingly from March till October, the thin, fibrous roots suffer if there is humidity, therefore the plant should be watered only when the surrounding terrain is dry. Keep dry as soon as the temperature starts dropping in October and keep it perfectly dry in winter at temperatures from 5 to 15 degrees centigrade.
Hardiness: They need to be kept in a cool place during winter rest and are somewhat resistant to frost if kept on the dry side prior to, and during, cold weather (due to the altitude they are hardy to -5 C ° C, or less for short periods.
Sun Exposure: Light shade to full sun, its colour tends to richer and darker when grown in light shade.
As they become mature, they attain a maximum size of 8-10 cm (20) cm.
Some of the information in this description has been found at desert-tropicals.com, llifle.com and cactus-art.biz