Question: I read on here that summer oil is best to combat scales on lemon trees. We do have scales on our lemon tree. What is summer oil and where can we buy this?
Answer: Summer oil is a light weight highly refined horticultural oil. You should be able to find it at your local nursery or garden center. Be sure to carefully read and follow all of the label directions.
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When singular and plural spellings differ, as in peony and peonies, try both.