Depending on the species of orchid you have, most orchids will bloom on their own schedule. Light is a triggering factor for some orchid species, such as Cattleya orchids, while other species begin blooming when temperatures become cooler at night, such as phalaenopsis orchids. You can take some basic steps in caring for your orchid blooms to ensure the longest-lasting and healthiest blooms you can get from your orchid.
Position your orchid in a spot where it will receive at least six to eight hours of bright, indirect sunlight every day. Place your orchid in the sunniest window in your house to ensure healthy blooming, but don't position your orchid in direct sunlight.
Keep daytime temperatures around 70 to 80 degrees Fahrenheit. Allow indoor temperatures to naturally cool at night to regulate temperature-triggered orchid blooming.
Fertilize your orchid once per week when you water it to care for its flower. Dilute a well-balanced orchid fertilizer into the water, following the dosage instructions on the label.
Repot your orchid no more than once per year, right after the orchid blooms, to ensure healthy blooming year after year. Replant the orchid into a pot with sufficient drainage holes in the bottom and use a potting medium that's appropriate for your orchid species, such as peat or sphagnum moss, bark or lava rock.
Remove the old flower spike after it finishes blooming by cutting it off with a sharp knife or scissors as close to the base as possible. The orchid will usually grow one or several new blooms.
Place your orchid outside during the summer and early fall to induce blooming and growth of new flower spikes. You can keep the orchid outdoors in indirect sunlight until the nighttime temperatures drop to about 50 degrees Fahrenheit.