I have seven phals. They have all been repotted once. Most are in 6"
pots. They are doing very well and have bloomed either two or three
times.

Question: is it necessary to constantly repot them as the roots fill
the pot? I just don't have room for larger pots and I wondered what I
could expect if I leave them in these pots permanently. Some have
long roots growing over the top of their pot.

I do change the potting medium every time they finish blooming.

Thanks

Jane