I have three large ferns that have developed pervasive brown spots and discoloring that has grown worse over the winter. The discoloring tends to start at the tips and spreads down. They are right by the house on the northeast side. All the other ferns on the property look fine, but the others are growing in more natural environments. These look as if they were planted at some point. As the other ferns on the property have been getting greener all winter, these have been getting browner. We have only been here a year, so we don't know much about them, but love them and don't if it's normal or if something is wrong.