Extensive research by USDA has found that 6" long cardboard tubes about 5/16" in diameter are preferred by the bees over 4" holes drilled in wood blocks. The longer 6" tubes also insure a higher female ratio in the six or seven egg compartments-when compared to 4" long tubes.
Our Mason Nest Houses have a weatherproof housing molded from all-green materials (Rice hulls and Bamboo). The 6" cardboard nesting tubes are made from Kraft paper, clear wrapped for moisture resistance. Both the tubes and housing are made from eco-friendly biodegradable materials. Each Nest Kit comes with an informative leaflet about Orchard Mason Bees.
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