Vanda batemannii
General Information
Vanda batemannii is a giant hot growing lithophytic or terrestrial orchid belonging to the sub family Epidendroideae.
Care Notes
These orchids have a fine root system that can quickly die back if left dry for too long, but also does not like to be kept wet, so water regularly but ensure that the mix is dry before watering.
Watering
These orchids gather most of their water from their aerial roots, which should be sprayed regularly or kept in a humid environment; roots exposed to dry air that receive no water will die back. On that same note, roots that are inside a pot surrounded by media may also die back, with new roots growing from the stem away from the pot.
If outdoors, a misting system aimed at the roots that turns on regularly will help them grow, otherwise if indoors placing the roots inside a vase or pot with no media along with regular spraying should give them the moisture they need.
Potting
These plants can be sensitive to repotting though should not require repotting regularly. Repotting should be done when the mix has broken down to the point that it doesn't absorb water or holds onto water for far too long, usually the plant shows a decline in growth as well.
The mix should be free draining, with a blend of 30% inorganic ingredients such as coarse sand, gravel or perlite, mixed in with about 70% organic ingredients such as peat, leaf litter or decomposed bark. Avoid commercial potting mixes as they can vary wildly and may contain "wetting agents" that can hold onto water for loo long, causing rotting and stunted growth.