Myrtillocactus geometrizans f. cristatus P.V.Heath
Crested Blue Candle, Crested Blue Flame, Crested Blue Myrtle, Dinosaur Back Plant
Myrtillocactus geometrizans f. cristatus is a slow-growing, sculptural cactus with stems having a central growing point that creates multiple growing points that crowd and push against each other. Some specimens are stable, while others can revert to normal growth.
Myrtillocactus geometrizans f. cristatus is a crested form of Myrtillocactus geometrizans. It is usually selected in cultivation, but specimens with crested stems can also be found in its natural habitat in central and northern Mexico.
USDA hardiness zones 9a to 11b: from 20 °F (−6.7 °C) to 50 °F (+10 °C).
How to Grow and Care
In summer, place Myrtillocactus in direct sunlight. In winter, find a cooler, light spot. That will allow it to go well-rested into next spring, making it more likely to flower.
These easy-care plants don't want a lot of water. Allow the soil to dry out before you give it another drink. Keep the soil completely dry in winter. The plants need a well-drained soil mix with small gravel added to ensure drainage.
Myrtillocactus are semi-hardy, make sure your cactus is not exposed to temperatures below 25 °F (-4 °C), or they may die. Nevertheless, it is good advice never to let the nighttime temperatures fall below 50 °F (10 °C).
Feed your Myrtillocactus monthly in spring and summer using special cactus food.
Since they are big-sized plants, they need plenty of space for their roots. Repotting should be done every other year or when the plant has outgrown its pot.
Learn more at How to Grow and Care for Myrtillocactus.
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