Tephrocactus geometricus Cactus they grow just fine on

they grow just fine on their own

The stem is fat and white with thick (but not too sharp) spines

Plants shown in 3

Color is generally best in higher light and/or water stressing them some

Tephrocactus geometricus Cactus they grow just fine onTephrocactus geometricus An unusual purplish gray cactus with round ball shaped stems. New stems are jointed and give a unique look to the plant, basically a sculpture of stacked balls! Easy to grow. Give good light and protect from frost. It seems a little more rot prone than the average succulent, but isn't something you should be too concerned about. Just make sure the soil is nearly dry between waterings. Joints break off very easily so avoid