Maidenhair fern problem...help!
I managed to grow a maidenhair fern indoors for a while now but I noticed problems recently. It seems to have developed brown spots going from center of its small leaves out (not from the edge in). Only some fronds have this. Otherwise it is a very healthy plant with many new young growing fronds. I have no idea what it is. I have a nice strong light (T5 fluorescent), a humidifier, even temperature (around 65-70F) and no drafts. Any ideas?