Ferocactus pottsii alamosanus Flowers: greenish yellowCultivation and propagation: They are summer-growing and pretty easy plants. They are suited for any rich, well-drained soil. If potted, repot them preferably in the spring, if their roots become cramped. Generally, they should be repotted every other year in order to provide fresh soil. However, this doesn't necessarily mean they'll need larger containers. After repotting, do not water for a week or more. Exposure: Outside they need a bright exposure, full sun or half shade in summer if the location is exceedingly hot or bright, inside needs bright light, and some direct sun. It can tolerate moderate shade, and a plant that has been growing in shade should be slowly hardened off before placing it in full sun as the plant will be severely scorched if moved too suddenly from shade into sun.Frost tolerance: Light frost protection required for safe cultivation but can tolerate sporadic light frost. Some of the information in this description has been found at desert-tropicals.com, llifle.com and cactus-art.biz
