Easily aid in the conservation of Mason Bees, one of the most highly effective pollinators of flowers, vegetables and fruit crops (they can pollinate 10x more than honey bees!). The Welliver Mason Bee house provides an ideal bee-keeping solution for the busy homeowner or part-time gardener. The house is equipped with paper tubes where the female bees can lay eggs from March to August. The larvae will develop over the winter months in the tubes and will emerge as adult bees the following spring. Tubes should be replaced after use or every 1-2 seasons. Mason bees are non-aggressive and cannot excavate their own cavities, so they are not a threat to property. They typically nest in pre-made cavities such as woodpecker holes, insect holes and hollow stems, making the Mason bee house an ideal alternative. Durably constructed of 3/4" Eastern White Cedar with rust-resistant screws, the Welliver Mason Bee house will provide a lasting habitat with minimal upkeep. Made in the USA. SELECTING A SITE: The Mason Bee house can be placed on the ground near the garden, mounted to the side of a building or post, or placed on/near a wood pile. Do not place the house near a bird feeding station. The tube openings should face away from prominent winds. Length: 7.5"Depth: 7.75"Height: 7.0"