Astrophytum capricorne

Description: It is a popular summer-growing species of relatively easy cultivation. It is suited for sunny-brightly exposure, but can tolerate light shade. However it will do its best with lots of sun and become stressed with inadequate light which could result in poor growth and unnatural shape. It has a good heat tolerance.
Watering: Water regularly (about once a week) during the growing season and keep it completely dry during winter or when night temperatures remain below 10° C. Water it less than average if in bigger pots.
Fertilization: Feed them once during the growing season with a fertilizer specifically formulated for cactus and succulents (high potash fertilizer with a dilute low nitrogen), including all micro nutrients and trace elements diluted to ½ the strength recommended on the label. They thrive in poor soils and need a limited supplies of fertilizer to avoid the plants developing excess vegetation, which is easily attacked by fungal diseases.
Special need: It is suited for airy exposures. Provide very good ventilation. Nearly all problems occur as a result of overwatering and poor ventilation, especially when weather conditions are dull and cool or very humid. ere.
Hardiness: It likes warmth (recommended minimum winter temperature 5° C) But plants kept perfectly dry can easily survive to light frost (it is reported hardy to -9 ° C for brief periods).

Pot size 3.0"

you will receive a similar plant shown in picture, without pot with soil on roots. 
"Sizes are approximate" every plant is slightly different then others and due to your screen setting and different screen type.