Very inspiring UK video!
So true about lambs ears - I always observe mostly wool carder bees on the flowers, and the males are VERY territorial. I sometimes feel they try to look menacing when I stand near the plants.
And I had no idea how much bees love dahlias until I planted a Bishops Children dahlia in a large container on our patio this summer. They visit those flowers all day long as long as the sun is shining.
I now plan to plant marjoram since it attracts and feeds the largest variety of bees and other pollinating insects.