Q.Leaves Turning Brown On Dieffenbachia
My dieffenbachia plant’s leaves are turning brown drying up.

Certified GKH Gardening Expert
I the browning leaves are at the bottom of the plant, that is normal. Just trim those off. If the browning leaves are higher up on the plant, it could be a watering issue.
Here are a couple articles that should help:
https://www.gardeningknowhow.com/houseplants/dumb-cane/growing-dumbcane-dieffenbachia.htm
https://www.gardeningknowhow.com/plant-problems/environmental/what-causes-brown-edges-on-leaves-of-plant.htm