When i visited the PYO in Wimbish near Thaxted in Essex (Grace's Farm shop), although their PYO wasn't huge they had planted a couple of fields of wild flower crops. I can't remember all the flowers but i know there was certainly a corn flower in the mix.
The field that caught my eye was through a gap in the hedge, so i'm not sure it was actually anything to do with the fruit farm.
I think it was a field of Borage, which has medicinal uses, culinary uses and if often used in companion planting to protect other crops.
I just loved the 2 blocks of colour side by side.