Origin and Habitat: Garden origin (Nursery produced cultivar)

• Echinocactus grusonii f. setispinus hort.
• Echinocactus grusonii var. setispinus hort.

• Echinocactus grusonii f. setispinus hort.
• Echinocactus grusonii var. setispinus hort.

• Echinocactus grusonii var. intertextus Y.Itô
• Echinocactus grusonii var. curvispinus
• Echinocactus grusonii f. curvispinus hort.
• Echinocactus grusonii var. tortulispinus hort.
• Echinocactus grusonii cv. Kraukopf

• Echinocactus grusonii var. intertextus f. cristatus hort.
• Echinocactus grusonii f. curvispinus cristatus hort.
• Echinocactus grusonii cv. Kraukopf cristatus

• Echinocactus grusonii var. subinermis Y.Itô
• Echinocactus grousoni f. nudum hort.
• Echinocactus grusonii var. brevispinus hort.
• Echinocactus grusonii var. inermis hort.
• Echinocactus grusonii cv. Togenashi Kinshachi

• Echinocactus grusonii var. subinermis f. cristata hort.
• Echinocactus grusonii var. brevispinus f. cristatus hort.

• Echinocactus grusonii var. setispinus f. minor mostruosus cristatus cv. Scarascia
• Echinocactus grusonii f. setispinus monstruosus hort.

Description: This plant differs from the common Golden barrel cactus (Echinocactus grusoniiSN|3345]]SN|3345]]) only for the fine spination. Spines are yellowish-white, very thin acicular, that become longer as the plant ages, 2 to 7 cm long. Except for the spines it is identical in shape and size to the standard species. It has a single slowly growing globe-shaped stem that became elongated (barrel-shaped) in maturity, up to 90cm in height and spread. This stem is pale green and heavily ribbed with numerous areoles sprouting radial, yellow spines. They normally offset with advanced age and a few multiples occur even at small sizes.
Flowers: The flowers are produced from end of spring to summer only on larger mature specimens receiving enough full sun. Flower are diurnal, vivid yellow (4-5 cm wide) and form a circular ring at the top of the plant, but are not very visible being small in relation with the size of the barrel, and lost into the creamy coloured wool at the plant apex.

Cultivation and Propagation: Echinocactus grusoniiSN|3345]]SN|3345]] are summer-growing and pretty easy plants to cultivate. They are suited for any rich, well drained soil such us clay, pumice, lava grit, and only a little peat or leaf-mould. If potted, repot 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. Fill about a quarter of the pot with broken crocks, gravel, etc. to promote good drainage. After repotting, do not water for a week or more. Water regularly during the aestival growth cycle (this plant need plenty of water, but do not overwater and let their soil dry out between waterings), and also needs to be avoided wetting the body of this plant while it is in sunlight. A wet cactus in the sun light can cause sun burning which can lead to scars or even fungal infections and death, keep rather dry in winter. No water should ever be allowed to stand around the roots. Feed with a high potassium fertilizer in summer.
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.
Diseases and pests: Watch for infestations of mealybug, scale insects and spider mite. Plant in good conditions will start to bloom when reach the diameter of 40-50 cm.