Home Gardening Pinner said, Actually I keep mine in the same pots they come in, every other day they get submerged into a 5 gallon bucket filled with 1/2 cup of Epson salts 3 gallons of regular water until the soil stops bubbling, then they are hung up to drip dry… always have ferns that are dark green, glossy, and 3×3 by September from ferns that start out with 7 fronds in May…