I got some comfrey cuttings / plantlets from Dan a couple of years ago .
They can be cut several times a year to make high w=quality material for composting along with other vet matter or they can h=be used as animal fodder or they can be kept as a four feet tall visual barrier that is covered in thousands of light pinkish blue flowers .
The bumble bees & large continental wasps have been working comfrey right from day one and are hard at it as soon as the temperature reached 8.5 oC and carry on in all weathers till well into dusk.
I suspect that it will do the same for honey bees .
Star flower aka. Borage is also another good bee friendly plant that has a long flowering season .
The comfrey is grown from slivers of root node'd cuttings and the borage from broadcast seed .
Anyone want some comfrey rooted cuttings drop me a PM & I'll take some for you and grow them up as it is due a hair cut & 3/4 .
Comfrey is a weed of successful properties , imagination and proportions..... Chickens , pigs ,goats , horses, cows love it , you can dry the leaves to make a comfrey tea infusion .