Also known as Golden Easter Lily Cactus

Flowers: Nearly 10 cm long. They are usually lemon yellow and bright yellow inside, but this species also has white, pink or red flowers. Blooms in flushes in late spring and occasionally in summer.

Cultivation and propagation: Echinopsis aurea is one of the more common cacti, extremely resistant to neglect.

Growth rate: It is a relatively rapidly growing species that will make large clumps given the best conditions.

Watering: Needs moderate to copious watering in summer, but do not overwater. Keep dry in winter at a minimum temperature of 0°C.

Hardiness: It is quite frost resistant if kept dry and hardy to -5°C to -18°C or less for short periods.

Exposition: The plant tolerates bright situations but is likely to suffer from sun scorch or stunted growth if over exposed to direct sunlight during the hottest part of the day in summer. It grows well with filtered sunlight or afternoon shade.
Some of the information in this description has been found at desert-tropicals.com, llifle.com and cactus-art.biz