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tea tree oil?

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Posted by whitejade z5 MI (My Page) on
Thu, Mar 3, 05 at 19:41

Has anyone tried using this essential oil in a mix for problematic roses? (black spot perhaps)

thanks in advance,
Chris

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RE: tea tree oil?

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I used it to sucessfully treat powdery mildew on a rose. It was useless for treating blackspot. I have thought about substituting tea tree oil for horticultural oil in Cornell Formula. That might be a good experiment to try this year.

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