Directions. The Purple Orchid Wine Country Resort & Spa. 4549 Cross Road, Livermore, California, USA. +1 (925) 606-8855. Contact Us. Your orchid may be experiencing root rot which is turning the leaves yellow. Repot the plant in new medium. Buds Dropping If you see buds dropping from the plant before they bloom, the plant is stressed for any number of reasons. This is when you will need to investigate the orchid's environment and move it to a happier space.