i have a neighbor 1500' west of me who has a row of 25 tulip poplars. i have a black locust & a linden tree & a dozen peach & cherry trees. they're great to have in the spring but the clover & many of the flowers in my garden ( plus whatever else they find )get the bees thru the later part of summer. the drought last year burned most of the clover around here & it really affected the bees ability to build up for winter. right now they are working my clover, cosmos, russian sage, & oregano blooms. i plant my vegetable patch rows far enough apart to accomodate my lawn mower so i can plant clover between the rows. the clover helps the bees & puts nitrogen back into the soil. it's easier to mow than to weed. i do weed between the plants.