| It could be loss of roots from overwatering (more likely done by the store than you), or it could be from shock due to the change in the environment. I'm sure Jerry will add lots to this answer. If the plant is in a plastic pot, you can flex the pot to free up the roots, pull the root ball out of the pot, then inspect for live roots. Live roots will be thick and firm, kind of succulent like a raw potatoe. If the roots are hollow with a thin wire inside, they are dead. If there are a number of live roots, put the ball back into the pot, and carry on looking for the problem elsewhere. A few dead roots are normal if they were very old or abused during a previous repotting.
It is extremely important that you learn how to water this plant. No one can tell you how often to water your plant. You have to find the right frequency for your conditions. Get some bamboo barbeque skewers from the grocery store. Using one you have not handled the business end of, push it into the pot all the way to the bottom, and leave it there. When you think it may be time to water, pull the skewer and look for moisture, replacing afterwards. The color will be darker when wet, and you don't want to water until the color has just about returned to normal. You can calibrate this method by digging your finger down into the pot to feel the wetness, BUT, you must not stab any roots with your fingernails, or you could infect the plant with a virus. So, put on a fresh clean disposable glove, that the finger tips haven't been touched, onto the probing hand, then poke your hole down into the mix. Then you can take off the glove and feel the inside of the hole for coolness. Phals should get very close to dry before watering. If in doubt, wait a little longer. Many mixes dry on top, but are still quite wet down inside the pot, where it really needs to get very close to dry. Cynthia, Prescott, AZ  |