Culture for Doritis, a related genus, and Doritaenopsis, a hybrid between the two genera, is the same as for pure Phalaenopsis. Fluctuating temperatures can cause bud drop on plants with buds ready to open. Light Light is easy to provide for Phalaenopsis. They grow easily in a bright window, with little or no sun. In dull, northern winter climates, a full south exposure may be needed.
Artificial lighting is excellent.
No shadow should be seen if you hold your hand one foot over the plant's leaves. Water Water is especially critical for Phalaenopsis. Because they have no major water-storage organs other than their leaves, they must never completely dry out. Plants should be thoroughly watered and not watered again until nearly dry through the pot. Water only in the morning, so that the leaves are dry by nightfall, to prevent rot from occurring on the leaves.