I agree with those who suspect sunburn. Phals shoud be kept out of direct sunlight.
Quote:
Originally Posted by mellymom  ...the bottom leaves are floppy and the surface of them is rough and thinner, like its drying out...also, two roots were above the medium...and they are withering away (dry and dead) |
How much humidity is there where the plant grows? And how often (and how) do you water?
Wilted roots are typically caused by one of 3 things:
1) sucking insects - which drain the plant's sap
2) too little watering
3) too much watering - which has caused the roots to rot
I recommend first looking for bugs. If no bugs, unpot and look at the roots. If they are rotted, remove and repot; if they are dry and withered, repot and water more or use a more moisture retentive mix. The mix you describe using is a "dry" mix and may require more frequent watering especially if your humidity is low.