Paphiopedilum concolor

The is a rather big plant of concolor alba which I recently purchased.  It has two large growths and each is now throwing out new shoots which is a good sign.  I grow my concolors in various types of medium including sand, small stones, pine bark, charcoal chips, clay pellets. 

A few other plants of P.concolor are also either flowering now or coming into flowering.  This one is  a plant bought last year from the Garden Festival in Gardens By The Bay.  I believe this is the variety from Kanchanaburi.  The tessellation on the leaves is different with dark purple on the underside.  Also most of the flowers have petals with dots arranged in a line down the middle.  This variety appears to prefer more humus in the medium.  But concolors are quite tolerant plants so I think anything will do.