Blue Myrtle Cactus
Myrtillocactus geometrizans
A treelike blue-green cactus bearing fragrant blooms and edible purple fruits reminiscent of blueberries.
Frost sensitive, hardy to about 28°F, USDA 9-11; best in warm low-desert microclimates.
AMWUA Notes
Very drought tolerant treelike cactus needing minimal summer water.
Care Guide
Water established plants monthly in summer and none in winter; excellent drainage prevents rot.
Prune to shape the treelike form or remove frost-damaged tips; cuttings root easily.
Light spring feeding optional.
Watch for scale and mealybugs on the blue-green stems.
Frost-tender below about 28°F; protect young plants and enjoy edible blue fruits in late summer.
Soil, Feeding & Propagation
Gritty, fast-draining mineral soil or decomposed granite; low organic matter
Needs sharp, fast-draining soil.
Low feeder.
Stem cuttings (callus first) or seed
8-10 ft
Shallow, non-invasive roots; give the treelike form room away from walkways
Placement Tips
- •Use as an architectural specimen with room for a 10 ft spread.
- •Keep away from walkways.
- •Plant in fast-draining soil.
- •Site where the fragrant blooms and fruit can be reached.
Features
Best Uses
Companion Plants
Quick Stats
Design Styles
Include in Your Project
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Use this care guide to maintain your Blue Myrtle Cactus. Questions about your landscape? Reach out anytime.
Data from 2024 AMWUA “Landscape Plants for the Arizona Desert” guide.