You might not get any bees, given that you're growing it out of its natural zone. I had read somewhere that bees will tend to work a particular type of flower all day, rather than just flitting to whatever's closest.
Most likely, they start with whatever is nearest their hive, and will ignore your citrus, although I couldn't keep them off them down here.
I tried the hand during the winter,and it was a no go then,but I'll try again.
I did notice a lot of the little green flies around the flowers today,as I was going to spray honey and water,so I just sprayed the bottom of the plant,because a lot those flowers hadn't opened yet,so now it is a wait and see if any fruit appears.
And there the size of ping pong balls now!!!!
Guess you better get your water color paint brush and start painting pollen!!!!!
Or get a little honey and spread it around the flowers,if nothing else you will get sugar ants!!!!!!
And they will spread a little pollen around for you!!!