WillC said:You haven't done anything wrong. It looks like it was recently repotted by the nursery or retailer and that may be the cause of the leaf tipping.
Remove excess soil from the top so that the uppermost roots are just barely covered. Then wait until the top half-inch of the remaining soil feels dry to the touch before watering. Keep it close enough to a window that it gets a couple of hours of direct sun each day.
WillC said:Please describe what you did when you repotted.
How much of the original soil did you remove or disturb? Were there roots growing outside the mesh container? How much larger is the new pot or is it still in its original pot? What kind of potting soil did you use?
zhengcl86 said:it looks to me like it was cut off from the mother plant and stuck the stem in soil. Did it have roots when you repotted?
I had the same problem when i got a rubber tree plant from my cousin. We cut it off from a node and stuck it in soil which in the end never rooted and died off slowly. I had my fingers crossed for 3 months and never any progress.
WillC said:It is unfortunate that the nursery didn't do a better job of growing a healthy root system before they sold it. That's on them, not you!
Remove any loose soil added to the top of the original rootball as that soil prevents oxygen from penetrating the root zone readily and makes it harder to determine when to water. The uppermost roots should be just barely covered with soil. Then, allow the top half-inch of the remaining soil to feel dry before watering.
The hard part is determining how much water to add at each watering. You want the top half-inch of the soil to get dry again in about a week so you will have to adjust the amount of water you add so that happens. It will take a bit of experimentation and careful monitoring on your part until you are able to make that determination of how much water it uses each week.
Be patient because the plant will put its energy into developing roots somewhat at the expense of top growth.
WillC said:It is only loose soil that may have been added to the top of the hard surface of the rootball that needs to be removed. Perhaps there is none. Don't try to remove any other soil and there is no need to aerate the soil.
Proper watering is the key now.