Puya castellanosii is a large terrestrial Bromeliad that is threatened in the wild and found in only three locations in Salta Province in northwest Argentina, growing in the Andes on dry scree slopes and arid mountain sides at elevations between 2300 and 3500 metres. Listed as Endangered on the IUCN Red List, Tropical Britain has grown these plants from seed and the species forms part of their ex-situ conservation programme for rare and threatened plants. John Edmiston reveals the hooked protective barbs on its foliage and discusses its cultivation requirements. A challenge for most exotic gardeners, Puyas need high light levels, very little water and - if given good drainage - will survive in sub-zero temperatures down to at least -5 Centigrade. Puya castellanosi is named after the Argentinian botanist, Alberto Castellanos. Subscribe! https://www.youtube.com/channel/UCFAwc05Y5Fln1_VnCkZRbag?sub_confirmation=1. Find out more about Puya castellanosii here https://www.tropicalbritain.co.uk/puya-castellanosii.html Find out more about the Tropical Britain ex-situ conservation programme https://www.tropicalbritain.co.uk/ex-situ-conservation Follow John Edmiston on Twitter : https://twitter.com/EdmistonJohn Follow Tropical Britain on... Twitter: https://twitter.com/TropicalBritain Insta : https://www.instagram.com/tropicalbritain/ Facebook: https://www.facebook.com/TropicalBritain/ Pinterest : https://www.pinterest.com/tropicalbritain/ Google+ : https://plus.google.com/u/0/b/109068695325565801994/+TropicalbritainCoUk