I'm struggling with this question as well. I know that chaste trees I've had at my other house were simply loaded with bumble bees (and the occasional honey bee) from mid summer to frost. I'll be planting more of these, as well as Bee Bee trees, Tillia, and more persimmons now that I've purchased a small acreage. I have some goats, and I want to have a double-duty hedge so to speak. Bee forage/nectar and livestock containment. I've planted the beginnings of a hedge row with trifoliate orange along the front of my property. I haven't really seen any information on here (and scant little anywhere else) with regards to this plant and honey bees. I assume that the flowers will be similar to a regular orange tree, and I have hopes that the bees will eventually find this hedge attractive. Does anyone on this site have any experience with trifoliate orange? Any input would be greatly appreciated.