Question
How can the phanelopsis bloom again after the flowers?does it bloom once a year?

Answer
Marites, most phalaenopsis bloom once per year-- usually in the late winter or spring. If it had previously bloomed and the old flower spike is still green, it could rebloom on the old flower spike.  Normally, however, the new flower spike originates from the base of the plant.  Best flowering occurs when there is adequate light. An east window is a good source of light.  Light is best when the leaves are a light yellow-green.  If they area dark green, you need to increase the light level.  Be sure to repot the plant in fresh orchid potting mix containing some fir bark after each flowering.  Usually, the garden centers at Lowes or Home Depot carry orchid potting mix. This repotting stimulates new root growth and strengthens the plant for its next bloom period.