our blooms start appearing in march and its coming up quicker than I thought ill have to search places that sell mason bees or find a source somewhere. I like starting small and watch something grow over the years. we've had mud dauber wasps here and their nests form all over the porch. thankfully I put this on a empty wall above my garden and nothing else. sounds like they could be after you lol.hopefully if they do show up they stay to the house I build and nowhere else around the outside of the house.