DoctorColeuses
In regards to your Kimberly and Bella Palm some photos would help so we can see better what you're dealing with.
As for your Asparagus fern, those fronds are done. There is no coming back for them. All is not lost though. Asparagus ferns are capable of coming back with new growth as long as your treatment didn't damage the roots. Trim off the old fronds close to the soil and continue to water when the soil dries out roughly 1" deep. Soon enough new shoots will emerge from the root ball to replace the old. This is not a true fern but a member of the asparagus family and your new fronds will look like tiny asparagus tips as they emerge. Each tip will eventually develop the delicate fern like foliage and can grow as long as 3 yards or more, so you might want to provide something for them to climb. The stalks, (not actually fronds) do not branch and tipping them will only cause damage, not branching. Were you to inspect the roots you would find that it has relatively thick white roots will large white nodules that swell up when plenty of water is available and act like water reservoirs in times of drought. In spite of their delicate appearance they are quite hardy and will grow well in bright light, indirect sun.
My preferred method of dealing with spider mites, is to give my plants a good shower of 15-20 minutes, temp set at roughly room temperature. This helps wash the mites away, removes dust from the fronds or leaves and waters the plant thoroughly at the same time. Bella palms are notorious for getting spider mites and I would do this regularly whenever it needed watering.
