Tip Burn On Cymbidium

Tip burn can be caused by excess salts in the soil/growing medium around the roots. We recommend water should drain from the pot at every watering, and once a month (maybe once every 6 weeks or so) use distilled water to help leach (flush) salts from around the root zone. So Cal tap water is high in salts that build up in soils, especially in potted plants. The browning of leaves may be caused by the same situation, and/or by too much high light or exposure to sun during the afternoon hours. Cymbidiums do better with early morning sun and afternoon (from about 11am on) shade. We’ve included a web link with more info about growing cymbidiums in So Cal.
http://www.themulch.com/orchids/cymbidium-orchids-care-in-southern-california