| One thing I would recommend which will help to avoid this problem in the future is to set somethign up so that you can tilt all of the phal pots at about a 45-degree angle. In nature phals basically grow on tree branches on their sides or hanging. Because of this moisture never collects in the crown, it always drains out. When we grow them inpots we artifically grow them upright and moisture can collect in the crowns causing trouble, namely crown rot.
As you probably know phals are intermediate growers and don't like might time temps below about 55-60F.
About the only thing I know to do for this stressed phal is to give it good culture form this point on. The damaged parts won't regenerate but it may survive and continue to grow.
Good luck and let us know how it goes for you.
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