I have repotted my peace lily and it was doing well. My problem is that the edges of some of the leaves turn brown. I trim them off but the brown will return. How can I avoid brown edges on the leaves? And how far back should I trim them? I have also fertilized it but it has been a month or so now.

Any help would be greatly appreciated!

Thank you,
Elli

Whenever you transplant an indoor plant, its a good idea to only go up one pot size approx. or about an inch or two in width. If you jump up to much, like going form a 10" growers pot to a 24" pot figuring you won't need to do it again for a few years, well you can hurt the plant. If you do jump too large, the soil does not have a chance to dry out at all inbetween your routine waterings. Excess water will be held in the soil and roots will start to rot. The rotting of roots shows up in the loose of living tissue at the furthes point from the roots. IE: Browning leaves.
A second common problem with Peace lily's is when they go to dry and wilt. You probally have seem this, and given the little guy a drink. If the leaves go down to far, the water flow thru the leaves is disturbed and the delayed reaction is browning leaves a week or two later. It's better to just cut off the entire leaf, if you still have plenty of other leaves to keep the plant going. Good luck....