Escobaria robbinsorum

Escobaria robbinsorum is a rare species endemic to a single ridge in souther Arizona. These have not survived below zero very well. But this small species is a fun plant to grow and one of the rarest plants in the USA. These are 3 year old seed grown plants. Very few available. Plants are 50 cent sized.
 
We share our experiences to help with your own trials of cold hardiness. We do not guarantee these plants in any garden or zone. Every garden is different and everyones growing conditions are different. Please try plants at your own risk, I do not want to be misleading to anyone.