Damp-off and bacterial infection are almost certain to destroy baby plants if their leaves are wet overnight. A diffuse light position. Young Phalaenopsis . The best environment for young plants is moderately humid, bright and with a lot of air movement. It gives injured tissue a chance to callus over or dry up.
Air movement is very important for young plants.
Vigorous air movement and slight water stress will speed up that process. Plants need fairly strong, filtered light to supply the energy necessary for wax manufacture and to lay down an effective, new layer of insulating cuticle. They are growing in diffused light in the greenhouse Potting medium is always an interesting discussion. We have used sphagnum moss or seedling bark for freshly deflasked seedlings. Turface or any other inert material may also be used provided the plants receive supplemental fertilizer.