Hans Quistorff wrote:Wasps are a vast and varied group but they are not that much for pollination. Their main function is predators.
Here in north Idaho wasps are our main pollinator now. Mason
bees and
honey bees are very rare. We do have bumblebees that are the main pollinator in the spring.
One of our most obvious pollinators is the Great Golden Digger Wasp. It is both predator and pollinator. It it not aggressive towards me.
Another pollinator is the Bald Faced Hornets. We had a lot of them last year on my fennel and other herbs. They weren't aggressive towards me but I was careful around them since they are extremely fast and you can't out-run them if they get mad at you. We don't have very many this year though. Not sure why.
There are also a variety of smaller wasps and bees that pollinate but they don't sit still long
enough for me to get a good look.
I don't worry about providing homes for them since the Digger wasps make tunnels in the dirt and they're better at it than I am. We also have brush piles for wildlife and rock piles for snakes and other species. What I am doing for them is trying to keep a steady supply of flowering plants for all insects to use. One of the favorites is lemon thyme. The plant is swarming with insects every summer. They seem to like the flowers in the Apiaceae family like lovage, fennel, carrot, parsnip, parsley, etc. They love Allium flowers too. My leek plants were a big hit this year. Bumblebees love comfrey flowers so I let them flower then cut the stem when it's about done and use it for
mulch.