Yucca's are both indoor and outdoor plants.. Y. elephantipes commonly known as the "Stick Yucca" or as it should now make more sense; the "Spineless Yucca" doesn't have very sharp leaves.
Although it can grow up to 30 ft in height, with a spread to 15 ft, it is usually less than 20 ft in height. It may have a thick, single trunk or be multi trunked resulting from a thickened, inflated, trunk-like lower base similar to an elephant's foot.The leaves are strap-like, spineless and up to 1.2 m (4 ft) in length. White flowers are produced in the summer, followed by brown, fleshy fruits which are oval and up to 2.5 cm long.
A Yucca may produce flowers sometimes, although this is rare indoors. This plant is grown for its leaves and structural height rather than the flowers. However if conditions are good, after a number of years, similar sweet smelling white bell flowers you see on outdoor Yucca's may appear.
The Yucca plant will be quite happy with as much sun as you can give it. Indoors a South facing window would be the first choice. Less bright conditions will slow growth considerably (which may be an advantage) however very shady and dark spots must be avoided to maintain a healthy looking plant.
Water Yucca liberally during warmer months of the year, once a week or more. The soil should dry out a little between watering's. In Winter a lot less water is required.
It is an excellent plant for garden rockery settings, desert type landscapes, patios and botanical gardens
For watering cacti, the golden rule is to make sure the soil is completely dry before watering! This will stop the roots from rotting. It is advised to always use a pot with a drainage hole so that excess water can get drained out. If kept in a sunny area, you will need to water it once every week. If it is in a semi shaded or filtered light area, you might need to water it once in 2 weeks.
Cacti like soil that is well aerated and fast draining. You can fertilise the cactus in the summer months when it is in its growing season. During the winters it is best to cut back on any fertiliser and let the plant rest.