My wasps prefer cool conditions. The ground ones nest under large rhododendrons, and the paper ones will be in a shady tree or under a deck. I find them very useful. I move any potted plants that are covered in aphids near to a nest, and the wasps clean them up. I put signs up to warn visitors. Diane Whitehead Victoria British Columbia, Canada On 2016-08-02, at 1:57 PM, Matt Mattus wrote: > I don't know why we still have not yet had a wasp nest in our greenhouse, > but we did have one just outside the door this year which took a few days to > eliminate in a boxwood shrub. I wonder it if gets too hot in the glasshouse > with temps reaching near 115 deg. F on sunny days? >