Should you fertilize your ferns in the winter while they are inside,
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Nancy Simon
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No,fertilization should not be done until march next year
This seems to have a ton of information about caring for your fern. Hope it helps
https://www.gardeningknowhow.com/houseplants/ferns-houseplants/growing-ferns-indoors.htm
I knew a lady that gave her ferns tea once a week. They were plush and beautiful! Steep 1 teabag in 1 qt. Of warn water.:-)
Sorry, mine stay outside in the ground, they don't go inside. They are too big, the fronds are about four foot high and come back every year.