Kevin: I do something similar in that we operate a breeder/cell builder yard of around 100 huge handpicked hives in a single location. It's not in a nectar rich area (by design) but heavy pollen flows are common. Despite having only moderate nectar flows through most of the 6 week season we typically supplement with a gallon of approx. 1:1 feed every 5 to 7 days plus keeping a steady diet of pollen sub. as an aid in diluting any possible yellow jasmine pollen that may get brought in.