Thanks for the bee link FW, very interesting and a great list
I was happy to see I have lots of the plants already on the list, my best one being a large Ribes currant which is just amass with bumblebees on the pink flowers early spring, the whole bush hummmms as you pass.
I don't have comfrey...yet but I'm on the case
Maybe my problem is too many other nice bee friendly flowers for them to bother with the courgettes by summer
There are several species visit our allotment and we have masonry bees in the house wall so I guess I'm doing something right, just maybe not making the courgettes very attractive? Their flowers are always hidden under the large canopy leaves. Would cutting the larges leaves off help perhaps??