 If you're watering your peas lily correctly, but see yellow leaves, brown and crispy edges, and the roots are growing around the potting mix, it's time for every pot. So get a pot that is one to two sizes bigger than the previous pot. Add your potting mix and gently free the roots from the soil. Place your peas lily in the pot and add some more potting mix to cover the roots. Pat down a little to make sure there are no air holes and add some water. And my friend, that's how you re-bought peas lily.