The bees put the eggs in the tubes, then add pollen and nectar.
Mason bees are harmless and do not make honey, but they have a much higher rate of pollination than those that produce honey. You've probably seen them in your garden without knowing it was a bee, says Taren Urquhart, who notes that they are often confused with flies because they don't have yellow on their bodies.
They are very, very effective pollinators.
A quote from Taren Urquhart, West Vancouver Memorial Library
Lesley Childs, a library worker, started breeding mason bees 10 years ago, when she received a hive built by Taren Urquhart's father.
The first year [of beekeeping], I noticed that my plum tree had more fruit. It was extraordinary and I find that my garden is more productive, she describes. She now has three hives and enjoys spending time watching the bees.
People who have borrowed bees are invited each winter to participate in an event of washing cocoons, to prepare them for hibernation.
We open all the tubes, then we wash the cocoons, says Taren Urquhart.
The program has attracted all kinds of beekeepers, including families with young children or elderly people, or even people who are not very interested by insects.