should the brown stalk in the middle of a fern plant be removed
If that is dead foliage from last year, yes. Remove any brown or dead foliage in late winter or early spring before new growth starts. If new growth has begun, just be careful not to clip off the green, new growth.
https://www.gardeningknowhow.com/ornamental/foliage/ferns/taking-care-of-outdoor-ferns.htm
I have 5 shaded flower beds at the edge of the woods. I live in southern Ohio. I grow mostly hostas and ferns. Daffodils come up in the spring. This year the daffodils came up but not a single fern or hosta in 2 1/2 beds. What could have killed them all? I don’t fertilize them. I do have mulch put down every year, but this is the first in 20 years that nothing has come up.
And they were healthy last fall? Was it a wet winter that might have caused root rot? These articles should help:
https://www.gardeningknowhow.com/ornamental/foliage/hosta/hosta-problems.htm
I just bought this plant and it says it shoots pollen.
Indoor artillery plants rarely flower so you should be OK.
https://www.gardeningknowhow.com/houseplants/pilea-plants/growing-artillery-plants.htm
I currently have ferns that are growing next to my foundation. I would like to keep the ferns, but will they hurt my foundation?
Their root systems aren't considered invasive, but the clumps do spread. They are fine near a foundation. They especially work well if you have a shaded foundation.
This collection of articles will give you quite a bit of information on ferns: https://www.gardeningknowhow.com/ornamental/foliage/ferns
I got this Kimberly Queen fern recently. I’ve been misting it a couple times a day because my house is pretty dry and I don’t want to have a humidifier running all the time. I noticed this white powder on the older leaves; is it powdery mildew, or is the plant just dirty?
It does look like powdery mildew. Hold off on the misting for awhile and see if that helps. Then, instead of misting, try a pebble tray.
https://www.gardeningknowhow.com/houseplants/hpgen/what-is-a-pebble-tray.htm
https://www.gardeningknowhow.com/houseplants/ferns-houseplants/growing-ferns-indoors.htm
Our porch is north facing and we get a lot of wind. How well would ferns do in these conditions? thanks
Most ferns don't tolerate much wind. A little bit of airflow is good, but windy conditions will leave them brown and shriveled. If you can find some form of wind break, that would keep them healthy.
This article will help you to care for ferns:
https://www.gardeningknowhow.com/houseplants/boston-fern/boston-fern-outdoors.htm
I’ve asked a question here before about my Kimberly Queen Fern; it had a case of powdery mildew which is now being treated organically. I no longer mist it as often because the humidity where I live is usually around 50%. The yellow leaves have cleared up after clipping them, but my fern still looks like it’s drying up on the edges! It doesn’t look too bad from afar, but close up you can see either black or dry and grey/brown leaves, and some yellowing fronds. I noticed one frond that had leaves which were curling into themselves. What’s going on here?
You will, still, need to treat the soil with a fungicide, as well. None of the old or dead growth will recover, but new growth should come out clean when treatment is working.
If this is still happening with the new growth, then keep treating with fungicide until no new instances occur.
Here are some articles on fungicide use:
https://www.gardeningknowhow.com/garden-how-to/info/using-fungicides-in-garden.htm
https://www.gardeningknowhow.com/special/organic/biofungicide-information.htm
https://www.gardeningknowhow.com/garden-how-to/info/homemade-fungicide.htm