By Bobedwards
London,
United Kingdom 
my mates dad who lives in spain has had this for a few years but over the last two weeks the stem in the middle has shot up to about 5 feet could anyone enlighten me as to what it is ? cheers bob.
13 Nov, 2014
Answers
I would get him to take the picture to his local garden centre there if I was him, I'll be intrigued to know what it is but agree it may be the start of a flower, please keep us informed about the findings.
13 Nov, 2014
Could be Agave stricta or Yucca rostrata. If Agave it will die after flowering.
13 Nov, 2014
Hi, I agree with Agave stricta, common name, hedgehog agave, Derek.
13 Nov, 2014
thank you all so much !
14 Nov, 2014
Just a flower spike - impressive isn't it! (I like the owl...)
13 Nov, 2014