One possible reason for asparagus ferns turning brown is that they are not getting enough water.

11 Causes of Asparagus Fern Turning Brown (And Solutions)

If you have an asparagus fern (Asparagus aethiopicus) and it’s turning brown, you’re probably wondering why and what you can do about it. This article will explain 11 possible causes of asparagus ferns turning brown and provide solutions for each.