A rare and unique cactus, the Tephrocactus geometricus are small low growing globular segmented cactus that grow branched into small clumps. The stems are blueish green that will redden to purple in full sun exposure. New growth is dark purple. Spines are black. This is a very slow growing cactus, only one globe per year may grow.
Tephrocactus geometricus is native to the Argentina Catamarca and Bolivia border where they grow in extreme desert habitats, between violet and red rock in flat or moderately steep sandy soils.
These cacti prefer lots of sun, at least 5 to 8 hours of direct sun daily. Indoors a south facing window is ideal. Outdoors place them where they will receive plenty of sun exposure, but protect them from intense, peak afternoon sun.
In the summer months, water only when the soil has dried out completely. Always err on the side of underwatering. They are built to withstand drought, and overwatering is one of the quickest ways to kill them. Water less in the winter months and only when there is a stretch of sunshine in the forecast.
The Tephrocactus will turn a blue/green to purple color when grown in full sun. The blooms last only one day and grow from the cactus crown. Fertilize: The Tephrocactus do not require fertilizer though it can be added to give container grown plants a boost or to supplement poor soil. Apply a water-soluble, balanced fertilizer monthly, diluted at half strength.
Approx. 2" tall and 1.5" at the widest point. Every plant will vary in size, color and shape.
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