This hard-to-find barrel cactus is native to Hidalgo, Mexico. As shown in the photo (surrounded by Erin Rachel Hibiscus) spines are neatly distributed. After flowering, unusual-looking fruits are unmistakable.
The Blue Barrel can reach up to 22 inches tall and 20 inches across. Water once a week in the summer and keep completely dry during the winter.
Lemon yellow flowers are long lasting and blooming begins when the cactus is about eight inches tall. Accepts light frosts.