If I used that mix, I’d mix it 50/50 with perlite. And you should never use sand. It impedes drainage.

I grow ferns and everything else in a 5:1:1 mix made up of mostly pine bark. Very chunky and fast draining.

Okay thanks. I'm glad I didn't add much sand to the mix, I did not think about it affecting the drainage. here's the organic mix ingredients in the mix I used Forest Bark, Forest Humus, Pumice, Peat Moss, Worm Castings, Washed Sand, Bat Guano, Oyster Shell, and Dolomite Lime (pH adjusters).

That sounds like it will retain a ton of water and stay saturated for a long time after watering, which most plants hate because the roots need to get oxygen from air. That's why Dave recommends cutting the mod with perlite.

Maybe someone who knows ferns will pipe in, but I seem to remember that they need a better draining mix to stay healthy. If you're good at search terms, consider using the search box at the top of the page to find something specifically about good soils and watering practices for ferns. Otherwise just follow Dave's advice, which will definitely help your little green friend.

Thanks for the advice, I will search for more info on soil and look into getting some more perilite to have on hand again.

Well drained is better.