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Ken from Tampa writes

How often do you apply Honor Guard PPZ for roses (leaf spot)?

Answer:

Honor Guard PPZ is labeled to control black spot on roses and should be applied when disease conditions are favorable for disease development at 5-8 oz per 100 gallons of water. Apply as full coverage until the point of drip and reapply after 30 days.

Answer last updated on: 05/03/2017

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