If the air has low humidity (less than 40%), you have to mist the orchid plant occasionally, or increase the humidity by using a humidity tray. It is a plastic or metal tray with some water, layered with pebbles. The plant should be kept on the pebbles, but no part or the roots should be in contact with the water in the tray.
This may lead to root rot. Others underwater their orchids which kills the plants. Ensure that the pot you use has a good drainage. While you need to water your plant thoroughly, you also need to ensure that there is no stagnant water in the pot. Water the plant, when the soil dries out completely. Orchids growing in bark need to be watered, once a week.
For best results, use a urea free water soluble fertilizer. Add it to the water meant for orchids, according to the instructions provided by the manufacturer. You may consult a horticulturist for more information about using fertilizers for growing orchids.
Though they are tropical plants, orchids like the night temperature to be cool. When grown in greenhouses, they are kept at a temperature ranging between 60 to 65°F at night. This keeps the soil moist. During daytime, orchids require a temperature of 70 to 80°F. A slightly higher temperature may also do, if the humidity level and air circulation are ideal.
Use a pair of sharp shears, and cut the stalk just above the node that is located within an inch from the point of the origin of the stalk. This may encourage growth of new blooms.