The Myrtillocactus Geometrizans (Blue Candle Cactus) is a rare and breathtaking species of cactus in the genus Myrtillocactus, native to central and northern Mexico. The Myrtillocactus genus consists of four agreed upon species: Myrtillocactus Cochal, Myrtillocactus Geometrizans, Myrtillocactus Schenckii, and Myrtillocactus Eichlamii.

Commonly known as the Blue Candle, Blue Myrtle, Bilberry cactus, or Whortleberry cactus, the Myrtillocactus Geometrizans is the variety of this genus that Cactus Vision stocks more frequently. The Blue Candle is a slow-growing cactus that grows considerably faster with age. The flowers of this attractively thick cactus are creamy-white, with a pleasant fragrance, and 2-2.5 cm in diameter. Interestingly, The Myrtillocactus geometrizans (Blue Candle Cactus) also yields edible dark purple berries when the plant reaches maturity. The berries are said to be a hit with cacti lovers who enjoy a little cactus-berry action.

The Blue Candle needs specific sunlight to grow optimally, too much and it can burn, too little and it will remain dormant. Cactus Vision suggests placing this cactus in a well-lit area (minimum of 3 hour of direct sun through a window) if positioning indoors to promote growth. In terms of outdoor captivity, do not expose young plants to direct full-day sun; a location where they receive half-day sun, especially in pots, is ideal. Avoiding positions where this plant receives full-day sun helps the Blue Candle cactus retain its frosted blue coloring. Mature plants, however, handle full-day sun with ease when watered sufficiently. Younger plants require protection from prolonged frost. We suggest covering smaller cacti with hessian bags for protection from frost burn when necessary. Older plants are mildly frost-tolerant for short periods, managing temperatures around 0 degrees Celsius.

Although uncommon, watch for red spider mites, scale insects, and mealybugs, and don't forget to give them a cactus hug occasionally.