Aranda, Vanda, Ascocentrums & Related Genera
Orchid growers that wish to grow vandas must first determine
that they will be able to provide adequate light and warmth.
Vanda and related genera are high light orchids. They will
need a minimum of four (4) to six (6) hours of direct sun
per day. The ideal position is in a south or south east window
without any obstructions, such as trees, overhangs and awnings.
Vandaceous orchids enjoy being summered outdoors in an area
where they will be shaded from direct noon sun. Before summering
any plant outdoors you must slowly acclimate it to the sun..
First place the plant in total shade. Then introduce only
filtered sun before exposing it to full sun. This process
should take several days. Summering a hydroponic orchid outdoors
means drilling a low overflow hole in the side wall of the
outer pot about 1/2" up from the bottom.
Vandas are gross feeders, which means they enjoy continuous
feed, but like all orchids are intolerant of high salt content
in their medium. It is very important that they are flushed
or leached at least once a month with warm running water through
the root zone. This will remove a build up of mineral salts.
You may leave your vanda dry for several days before watering
again with the nutrient solution. This will provide the root
zone with optimum oxygen.
Mix the nutrient solution as per packet directions. You may
store the nutrient in a gallon plastic bottle to be used when
ever it is time to water your plant. It is best to keep it
at room temperature and out of direct sunlight.
Pour the nutrient slowly into the clay pebbles next to the
water level indicator. Water until the indicator reads about
half way between the "min" and "opt" level.
Always be sure there is not water in the outside pot before
Almost all vandaceous orchids are warmth loving orchids.
They will tolerate night temperatures as low as 60F with day
temperatures as warm as it may get as long as there is good