How to Propagate a Fern
Propagation of ferns which have rhizomes, underground stems from which roots shoot out, is possible by division of the rhizomes. Tip cuttings can be taken from ferns that do not have rhizomes, but separation is the method most likely to succeed. Does this Spark an idea?
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Instructions
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Take the fern out of its pot. Gently shake the root ball, allowing the excess potting mixture to fall off.
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Find a rhizome--a thick stem with branching-out roots. Select a section of the rhizome with fronds, the foliage of the fern, growing up from it. You must choose a piece of rhizome with foliage growing on it for successful propagation. It's helpful but not necessary to have roots already growing from the rhizome.
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Cut a small section of the rhizome with a sharp knife. You can take multiple pieces if you want more than one new fern.
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Place the rhizome piece in small 3-inch pots with the foliage pointing straight up. It is a good idea to moisten the potting mix prior to inserting the rhizome. A standard potting mix is sufficient for fern propagation.
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Put the fern propagation in a low light spot away from direct sunlight. Cover the pot in clear plastic, using a plastic freezer bag or 2-liter bottle. The plastic helps to keep the new fern moist and warm.
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Uncover the fern in a month. During the next month, water only once every two weeks. The fern propagation needs time to adjust to an open-air environment. After this period, begin treating the plant as a mature fern.
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