Mammillaria heyderi ssp. macdougalii Santa Catalina Mts, AZ 7000ft

Mammillaria heyderi ssp. macdougalii or Green-Flowered Pancake Cactus is a semi-cold hardy plant from southern Arizona. The seed for this plant was collected on Mt Lemmon at 7000ft. These have taken -11F for us but they were in a very protected location. These bloom green in early spring and get a deep taproot like a turnip. Only a few available this time.
 
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.
 
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