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There is no correct answer. Phalaenopsis flower spikes may be left alone after flowers fall, or you may prune them off wherever you want. The stalk may die back and turn light brown on its own. It may die back partially. Most people cut them off when they turn brown. Nodes on the stalk that have not flowered might in future years push out new flower spikes, so some people leave on the green spikes.
This kind of Phal hybrid, with large round flowers, tends to make flower spikes in mid to late winter, and flowers from late winter to late spring or early summer. Commercial growers manipulate temperatures in the greenhouses to get them to flower at any time of year. With good care yours might flower next spring; however, it might have just finished flowering out of season, and might take a year off getting acclimated to your seasons. It might have been grown in Taiwan and crossed the equator to get to you, in which case it will take some months to get oriented. Phals normally produce leaves and roots all year when it is warm. In homes kept cool for the winter they slow down drastically or even stop growing until it warms up.
Phals are easy to take care of but they are not like other house plants. If you're unsure about caring for Phalaenopsis orchids... go to the left yellow menu, choose Forums, choose Beginners, and look near the top for the sticky thread The Phal abuse stops here.
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