This clump forming barrel cactus produces numerous offsets from the base each with 8-ribs. It has yellow grey needle-like spines and the diurnal yellow to orange funnel-shaped flowers appear towards the top centre of the plant during summer. 

Hardiness zones 9 to 11 

Ferocactus robustus is naturally found in southern to central Mexico (Puebia) growing on hot dry rocky hillsides in very well-drained stony soils. It prefers an open sunny to slightly shaded position and is drought and frost tolerant.

This Barrel Cactus is grown for its clumping habit and small yellow flowers. It is planted rockeries or arid gardens as a specimen or found in botanical collections. It is suitable for coastal or inland regions establishing in 2-3 years and is moderately long lived. It is also grown in containers courtyards or in patios and under glass in cold climates. ID 2037

Note:
This attractive small cactus grows quickly and can spread up to 5 m (15 ft) wide.

Cactaceae (kak-TAY-see-ee)