Astrophytum care requirements
Quick answer
For Astrophytum, care requirements come down to this: Astrophytum (Summer type), commonly called 'star cactus' for their geometric ribbed forms, are among the most prized and sought-after cacti in cultivation. Native to Mexico and southern Texas, Astrophytum species include the famous 'bishop's cap' (A. myriostigma) with its spineless star shape and the 'dome cactus' (A. asterias), which resembles a silver dollar with dots. Their stems feature white woolly flecks (astrophytum dots) that help reflect sunlight and reduce water loss. Despite their cactus classification, they are not frost-hardy.
Start here:
- 1. Water thoroughly then allow to dry completely — every 2-3 weeks during growing season
- 2. Give maximum sunlight — Astrophytum need 6+ hours of direct sun
What care requirements mean for Astrophytum
Astrophytum (Summer type), commonly called 'star cactus' for their geometric ribbed forms, are among the most prized and sought-after cacti in cultivation. Native to Mexico and southern Texas, Astrophytum species include the famous 'bishop's cap' (A. myriostigma) with its spineless star shape and the 'dome cactus' (A. asterias), which resembles a silver dollar with dots. Their stems feature white woolly flecks (astrophytum dots) that help reflect sunlight and reduce water loss. Despite their cactus classification, they are not frost-hardy.
How to meet Astrophytum care requirements
- 1
Water thoroughly then allow to dry completely — every 2-3 weeks during growing season
- 2
Give maximum sunlight — Astrophytum need 6+ hours of direct sun
- 3
Use 70%+ inorganic gritty mix — excellent drainage essential
- 4
Avoid getting water on stem — spots can develop into corky lesions
- 5
Grow in small pots as Astrophytum prefer to be slightly rootbound
Keeping Astrophytum in range
Water sparingly in summer; keep dry in winter; provide full sun; protect from frost below 50°F.