Echinocactus grusonii, or more popularly known as the "Golden Barrel", is a very beautiful and fast-growing member the "barrel cacti" family, which includes both Echinocactus and closely related Ferocacti. This plant can be a very dramatic facet of landscaping with its dense golden spines and rugged tolerance of full sun, heat, drought and even some frost. Can grow to 36" in diameter and height in 20 years. Will offset with age, producing beautiful clumps. Yellow flowers appear at the crown, usually in summer. Native habitat is Mexico, but is becoming extinct in habitat due to development of land. Prefers extra drainage in soil mix, as can be attained with the addition of extra perlite or pumice. Bright light to full sun. Can be grown in a container on a warm, bright patio or in full sun in a garden landscape. Water thoroughly when soil is dry to the touch. Can tolerate temperatures below freezing for brief periods, but is best to protect from frost to prevent scarring.