Just a thought , no idea really what the nectar would be like , but, Pheasant bush (Leycestera Formosa)has been blossoming for quite a while and bees seem to love it it. Long stemens on flowers and a pink to red colour inside. Now has berry as well and is easy to identify as the fruits look like long dangling ear rings in shades of pink to purple and lance shaped leaves with a graceful branching habit. Google have photos (a website selling) third from top on my search