Can you repot a peace lilly?

Of course you can! Peace lilies are vigorous, and a healthy plant will probably need to be repotted once a year! You can check your plant to see if it needs repotting in several ways. You can check the roots: if they are growing out of the drainage holes in your pot, it needs repotting. You can pull the plant out of the pot and see if it is root-bound (the roots have filled the pot and are growing round and round in circles), and if when you water it the water goes immediatly through the pot and out the bottom, there is probably too many roots and not enough soil to soak up any water. The new pot should not be any more than one size larger than the pot you have the plant in now.