Can Neem Oil be used on Ferns?

by Shari
(Woodward, Iowa)

Can Neem Oil be used on outside ferns that I want to bring in for the winter? I live in Iowa and my potted ferns do not do well outside in the winter I would like to bring them in but not the bugs...

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Can Neem Oil be used on Ferns?

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Testing neem oil on ferns
by: Birgit

Hi Shari,
There are so many different kinds of ferns, I'd rather not do any guess work here.
Delicate ferns are definitely on the list of plants that MAY be sensitive to neem oil.

The best way to find out is to do a test application. Make a 0.5% dilution of neem oil (1 tsp per quart) and test it on one leaf or a few bottom leaves only.
If the leaves start wilting, rinse the plant with water.
If they don't, wait for a few days. If your ferns are too sensitive to oily sprays it will show. If there is no sign of burning it should be ok to spray the whole plant (with freshly made solution, of course).

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