Tierra Garden 37-325 Mason Bee Block Made of fir and durable bamboo Provides a welcome environment for Mason bees Mason bees visit twice as many flowers as honey bees & pollinate about 95% of the flowers they visit Hang block near your garden, raised bed, flowers or fruit trees Mason bees are fascinating to watch and are beneficial to the environment Made of fir and durable bamboo Mason bees visit twice as many flowers as honey bees & pollinate about 95% of the flowers they visit Hang block near your garden, raised bed, flowers or fruit trees Mason bees are fascinating to watch and are beneficial to the environment