Cymbidium erythrostylum is one of the few cymbidium species that prefers warm temperatures, approx. 70F of slightly more during the day and a night-time drop to around 60F in Summer. In Spring, Autumn and Winter, night-time temperatures may drop to between 50F (Winter) and 60F (Spring and Autumn).
In Summer this orchid likes to be kept shaded - not bright light and no direct sun - but provide as much light as possible during the rest of the year (still no direct sun).
Water well from Spring through to Autumn, but decrease and increase water gradually through Autumn and Spring respectively and keep dryer (not dry) through the Winter months. Fertiliser may be used while the plant is in active growth, but the growing medium should be flushed out regularly to avoid any build up of salts.
Cymbidium erythrostylum needs be kept moist in the growing season but the medium also needs to be free-draining to avoid rotting the roots. Growers will find the mix that suits them and their plants best. Suggestions include plain bark or bark mixed with small quantities of a more moisture-retentive medium like sphagnum or small pieces of sponge, rockwool, but there are many other possibilities.
Repotting should be carried out in the Spring, just as the plant is beginning its growth cycle, ideally without disturbing the roots.