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July 2, 2016 at 5:58 am #203370 Reply

E. Vinje
Keymaster

Hi Pamela –

All of our Yellow Jacket Sprays will work quickly in your greenhouse and are SAFE to you and the environment. In fact, most are made with natural or organic plant oils that work on contact. If possible, apply at sunset or sunrise when insects are least active and in nest.

Hope this helps!