Hi Jofus and welcome to GoY. Sorry do you have another name for your plant/shrub/bulb I've never heard of cocos

I think Jofus means Cocos nucifera, the coconut palm - I'd use John Innes No. 2 or 3.

Grow in john innes number 2 with added sharp sand, and fibrous garden compost, about a 2 1 1 mix, be prepared to have to get rid of it in a few years time as they grow to between 70 and 100 feet eventually, unless you have an extremely large conservatory type greenhouse, good luck !, Derek.

Sorry Bamboo, crossed there, Derek.

No problem, Derekm - your answer's better than mine anyway, lol