oneeyeluke said:Your leaves are not getting burned from the window light, they are getting brown from excess moisture in the soil. When you up potted your rubber tree you increased the water volume. A plant pushes water through to the edge of its leaves, and if given in excess, this can cause veins at the edges to burst, which leads to browning. Let the top two inches dry well before watering again and give it a lot of indirect sunlight. As long as the sun doesn't hit the plant, give it all you can. Variegated Rubber trees lose their vargaition in low lighted shade. Good luck
oneeyeluke said:NO keep it in the container you have now, because you don't need to stress the plant any more at this time. Let the top of the soil dry well before watering again. You got this now, and will have a very pretty plant soon. Good luck
WillC said:Your plant is reacting to the repotting. If you left the roots and the original soil undisturbed, then the only issue will be proper watering. If you removed some of the original soil, then you may continue to get more brown leaf edges.
Remove any soil you added to the top of the original rootball when you repotted as that soil prevents oxygen from penetrating the root zone readily and makes it harder to determine when to water. Then, allow the top half-inch of the rootball to feel almost dry before watering it thoroughly.
WillC said:As I wrote previously, after removing the excess top surface soil, let the top half-inch of soil get dry before watering. It is hard to be more specific than that.
Fertilizer is not medicine and will not help your plant so don't use it at all.