Question
I have a tall phalaenopsis orchid (one 3-foot stem, several 4 to 7 inch leaves) that bloomed for 2+ months and has now dropped all of its flowers. The stem is now drying up and turning brown from the tip. It has also started growing a new leaf.

I've been finding mixed instructions about where to cut off the stem. Some say to cut at the base, another says to cut after the 3rd node from the base, and another says to cut after a node but before a dried flower node with the risk of smaller flowers.

Where should I cut the stem in my case? I want it to grow healthily, but I've also read cases of the orchid not flowering again. Is this still a flowering stem? Will this stem flower again if i cut it from the base? Or should i expect a new stem to grow out after I cut the original stem?

Answer
Good questions Carlina. There is some heredity involved in answering one of your questions.  Some species phalaenopsis, which ultimately are used to make hybrids such as yours, have flower spikes that remain green after flowering and this trait is passed on to the hybrid.  In other cases, the species used flower only once from the flower spike which then dies back.  You may have the latter, but need to wait to see if the flower spike dies all the way back. You could remove the flower spike above a node.  That may or may not stop the progression of the die back. If it does not stop the progression,  clearly it can be cut off where it joins the plant.  In either case, during its next flowering period, your plant should send up a new flower spike from its base, Be sure to provide adequate light as that is important for future flowering.  The leaves should not be a dark green as that is a sign of insufficient light.

It is generally recommended that phalaenopsis be repotted in an orchid potting mix after flowering.  That provides a good environment to promote growth for future flowering.  I won't go into repotting details at this time but you may ask follow-up questions if you are unfamiliar with this process.