How to Get Phalaenopsis Orchids to Bloom

Plant the Phalaenopsis orchid in a container filled with orchid mix specifically formulated for epiphytic orchids. Moth orchids thrive in a growing mix that retains moisture without getting water logged.

Maintain consistent levels of moisture at all times. Avoid letting the growth medium dry completely between watering. Irrigate the growth medium when the top 2 to 3 inches feel dry. Depending on the climate, this can be every two to three days in the summer, and 10 days or longer during the winter.

Place the moth orchid in a spot with exposure to bright, indirect light, such as an east-facing or shaded south-facing window. Avoid exposure to direct light, which has a detrimental effect on the plant. Supplement poor lighting in cold areas with two to three tube fixtures that provide light for 12 to 16 hours a day. Suspend the tubes 6 to 12 inches above the plant's tips to prevent direct contact. Orchids need the proper amount of light to bloom.

Keep the Phalaenopsis orchid within its ideal temperature range of 70 to 85 degrees F during the day and 60 F at night. Avoid placing it in a spot with temperatures higher than 95 F. Good light exposure and consistent temperatures below 75 F for four to five weeks encourage flower spikes on the Phalaenopsis orchid.

Maintain humidity at 50 to 80 percent to encourage the Phalaenopsis to flower. If the relative humidity falls below 40 percent, set the potted Phalaenopsis on a tray of gravel partially filled with water. Position the base of the pot above the level of water at all times.

Feed the Phalaenopsis orchid a complete fertilizer specified for orchids once every three to four weeks during its growing season to encourage blooms. Dilute one-half to 1 tsp. of fertilizer in a gallon of water and feed the plant. Avoid over-fertilizing the plant.