Ferocactus glaucescens is a medium sized solitary or basally suckering, barrel cactus. Multiple heads are produced as the plant ages and can form a very large mound. This species is sometimes confused with Ferocactus echidne (DC.) Britton & Rose and may even hybridize with that species.Stems: Glaucous grey, up to 55 cm in height, 50 cm in diameter. Globular depressed at the apex, it becomes shortly columnar as it ages.
This plant needs plenty of water (indicatively, about once a week). But it's necessary to avoid wetting the bodies of these plants while they are in sunlight.
In winter keep completely dry at 10°C. This usually aids in maintaining a healthier plant, but it can tolerate sporadic light frost.
Pot culture: It grows best in a fairly roomy, well-drained container filled with a porous cactus soil mixture that doesn't contain too much humus