For bees, the bumble variety, you need to create an appropriate environment for them. Plant loads of flowers, not double ones, of all shapes and sizes (open daisy type flowers, tubes, antirrhinum types, herbs such as thyme and marjoram which colonise, garden geraniums, spring bulbs, ) and have willows which produce their pollen at varying times for the queens coming out early. As I mentioned, we are high and extremely windy, but we have loads of bumble bees, but not usually honey bees, which I think can't take such high winds. Windbreaks of hedges and trees, or green mesh, will help your fruit and your flowers by creating a local microclimate, which is a bit warmer, a bit less windy, and generally more conducive to plant growth.