Drawing Flowers Drawings Inspiration : To ensure pollination of your raspberries, build a simple orchard mason bee hous… August 15, 2018 0 2921 Flowers Drawings Inspiration : To ensure pollination of your raspberries, build a simple orchard mason bee house by drilling holes in a 4×4 and giving it a shingle-roof overhang. Secure the house to a sunny trellis pole, and the bees will come.