Hi Maggi,
Sorry not to have replied to your request for information earlier - a 'dodgy' back has prevented me sitting down in front of the computer for too long; must have been those heavy pots at the weekend.
I can't say that I've done anything special with the Roscoea; firstly it came from Ian III (Christie), but he probably has a waiting list by now as many people in Leeds asked me where I had managed to get it from. As far as pot culture goes I repotted it after obtaining it in a dormant state into a plastic pot (it's double potted in clay for the show bench. Compost is simple, it has to be for me
; I generally use two basic mixes and this was my 'humus mix': equal parts of John Innes No2, composted bark, chipped bark, grit and chopped moss, with a little perlite added (for luck rather than for any scientific reason). It is then stood outside overwinter on a shaded sand bed where I keep my Arisaemas, Cypripediums, etc and subjected to concentrated neglect until the flower spike emerges, when it is worshipped.
Not difficult at all then, the hardest part is obtaining some material in the first place. I think I first saw the plant about ten to fifteeen years ago 'behind the scenes' at Edinburgh Botanics, when it had may even have flowered for the first time in this country, and it has been top of my wants list ever since. Here's another view for you....
Peter