I’ve assumed it is nectar - never paid that much attention. I’ve seen my bees on it along with butterflies, and I’ve also seen birds attracted to it (hence my nectar thoughts). The most unfortunate thing is that locusts seem to like hiding in it too…who would have thought I’d regularly be killing locusts in my front garden…!!!
Don’t get me wrong, I wouldn’t say it is the first choice for my bees but it seems to provide for them when there is very little in flower during the colder months and I always see some bees visiting it whenever it is flower (it doesn’t get swamped with bees like my red flowering gum, banksia’s, or passionfruit). And for me, that’s sufficient!
Actually…that’s a good point. If you want to you could try planting a gold passionfruit vine. They tend to flower late in summer, so that would provide forage for your bees. You might be lucky enough get a few yellow passionfruit by mid/late Autumn. Assuming your frost/colder mornings doesn’t impact the vine during winter you should then find yourself with ripe yellow passionfruit in mid spring.