Geoff Greetings, what I have seen is that Dutch white clover is not the bees favorite flower, they can and will use it however if something else is handy (blackberries in my case) they go there. We also have a few blueberries and bumble bees work best for us there. I don't have hard data just rough counting but it seems that by the time a honeybee has visited three flowers a bumble bee has been to ten.
Cheers
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