Posted: 09/04/2016 at 10:13
the red nettles are annuals and the bees love them. Creeping buttercup is a thug and will take over, Meadow Buttercup, Ranunculus acris, is more refined. Grasses are part of our native plants, the Brizas, quaking grasses are lovely but prolific seeders.
I think most people growing annual mixes cultivate the ground, just like you would for any annual mix, and remove perennial weeds like dandelions and buttercups