Sold in 20L pots.
A large yucca with thick, olive green leaves containing white, curly fibres along its leaf margins. Eventual height at maturity: 6m+ with a spread of up to 2m. Older leaves will naturally die off, forming a thick trunk.
Care requirements: grow in full sun preferably and in a very gritty, free-draining soil, e.g. equal parts grit and compost/soil. 
Hardy to -10 and possibly lower as long as kept dry and in a sheltered location.