Cattleya warneri - sheath question

[kinknstein]

Hi Everyone
I am pretty new to growing cattleya's, having only grown them for about a year now so please forgive if this is a dumb question. I have a Cattleya warneri which has been growing really good foor me, and has put out 5 new growths this year. When I purchased it, it was described as being Flowering Size, and was and still is in a 4 inch pot. My question though, is when does it produce sheaths? I have alot of other catt species, and from what I have observed, the sheath is usually produced just after the new growth matures, but I have not see any signs of sheath from my warneri. Does it produce them at a different time? Or could my plant just not really be flowering size yet?
Any help would be greatly appreciated.