The main problem hobbyist have with Vanda are that they do not water enough. It is almost impossible to over water a Vanda.
Here in Florida they get water at least every day and 2-3 times a day in hot summer if it is not raining. Our summer rains normally rain 3-4 hours a day.
For best flowering they should be fertilized 1-3 times a week and the light level should be 40% to 75% of full sunlight. (4000 to 7500 foot candles which could be full sun in northern locations for much of the year.)
Given this treatment they grow like weeds.
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