Compared to other varieties, I have not been very impressed with yarrow (Achillea millefolium) as a plant for attracting pollinators. That changed this weekend when I looked more closely at our (much-expanded) clump of yarrow and noticed it swarming with a variety of insects. I planted it in spring 2020 and I imagine that for the past two growing seasons there wasn’t enough of it to attract the insect life I’m seeing today.
When I find some time, I would like to transplant some to the edges of my vegetable beds which are basically empty at the moment. I am not feeling particularly motivated to do veggies this year and I’m also dealing with a pretty overwhelming gastropod situation. Yarrow grows so densely it might deter the snails and slugs (and/or provide a sacrificial meal) while also attracting beneficial insects and apparently accumulating nutrients in the topsoil.