do you cut back Orchids?

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Some Paphs produce multiple blooms on one stem. But you can tell if there are more as it is usually developing near the top. If the stem is turning brown, it is done and can be cut back close to the plant. Cymbidiums can also be cut down close to the soil. Leave about an inch or so. Phals can be cut partway back to just above one of the nodes and many of them will send out a spike from one or more of the remaining nodes. But if the stem is already brown and woody looking, it is finished.