Japanese Painted Fern - Knowledgebase Question

Greendale, WI
Question by zachar
September 17, 2000
Our Japanese Painted Ferns (planted outdoors in a shade garden) have some solid green fronds, should they be removed? Are these fronds called "sports" and will the entire plant "revert" to solid green if nothing is done. I realize that in a few weeks the entire plant will be knocked down by frost so maybe intervention is not required but I wanted to ask an expert. The rest of the fronds have the gray - green coloring you would normally associate with a painted fern. They have been in the ground for about 3 or 4 years.


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Answer from NGA
September 17, 2000

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It isn't unusual for odd colored leaves to appear in plants from time to time but I don't think the entire fern will be affected by a few odd fronds. If it were a grafted tree or shrub the odd color might be considered a sport, but it's usually due to cultural conditions when an herbaceous perennial produces off-colored leaves. Since the leaves will be gone in a few weeks, I'd leave the plant alone this year. Next year the fronds should be of the expected color. If not, it might be that some spores have germinated and begun new plants within the original plant. If so, it will be time to dig the plant and divide it, discarding the roots associated with the off color foliage.

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