Q.why are my leaves on my Boston fern turning brown
Why are the leaves on my Boston fern turning brown?

Certified GKH Gardening Expert
It could be a watering or fertilizing issue, or in need of more humidity. Either mist it regularly or set it on a pebble tray with water in it to raise the humidity around it. You can cut the brown fronds off. For additional information, these articles will help: https://www.gardeningknowhow.com/houseplants/boston-fern/trimming-boston-ferns.htm
https://www.gardeningknowhow.com/houseplants/boston-fern/boston-fern-care.htm
https://www.gardeningknowhow.com/houseplants/boston-fern/boston-fern-fertilizer.htm