So my favourite of all the ferns is the lovely maidenhair and I have 2. Both are doing well in north facing windows and this one in particular is developing more fronds than I have ever seen on this particular species- some even have spores. I'm just a bit worried about these brown bits on the leaves - I can cope with them on older bottom leaves but some of the new ones are getting them now

I'm in rainy old England just south of London. I can't believe the meagre sun we get here is burning the fronds through a north facing window.

Anyone seen this on this plant before?

Maidenhair ferns are native to my area. They need lots of water, alkaline soil and a trim once a year. They grow in limestone seeps and go dormant.

If you are using fertilizer, you could be lowering the pH to an undesirable level for your ferns to be happy. When keeping them in a pot, add a spoonful of garden lime to the soil mix.

It looks like you have new fronds growing so maybe the old fronds are dying back. I cut mine down every early spring and let them regrow from the ground up.

Thank you

Yes the new growth on this thing is incredible so it must be happy to some extent

I use houseplant fertiliser once a month and use a reduced strength so I doubt it's that but will look into adding some lime

So today I woke up and lots of the new growth is dying too. I've cut the dead bits off and given it more water as it was 4 on the moisture monitor. I had been spraying it to mist the leaves and while googling it, the suggestion of fungus came up. Anyone think this is likely?

I think you let it get too dry. This plant grows in seeps, its constantly got water running across the roots. Maidenhair ferns aren't difficult, just particular. If you let it go dry, it will die back but not necessarily dead, just starting over.

I also sprayed this fertiliser stuff on it that I don't think it liked. One half seems to faring better than the other. I love these so much I'll see if I can nurse the back to health but I'll probably move It to the bathroom and buy a new one in all it's glory for the living room. One day hopefully I'll get the hang of these ferns

Maybe fertilize once or twice in spring, mixed at 1/4 strength. They don't need much (remember, living in limestone seeps). At the next watering, flush the soil well. The salts in the soil will burn the leaves.