My name is Dr Margriet Dogterom and am the founder and owner of Beediverse. I write this blog for all who love bees and who want to learn more about these wonderful creatures.

The reason for setting out cocoons within the protection of a house that shelters nesting tunnels, is to provide the cocoons, and the mason bees inside, a place that is protected from predators like mice, protected from the sun and protected from rain and snow.

It depends on the design of the house whether cocoons can simply be set within the house, like underneath the roof of the Highrise or whether space needs to be created for the vial like in the Starter Cottage.
Royal house with predator guard

Temporarily remove predator guard from the front of the Royal house,
and set vial on its side, with tab removed,  underneath peaked roof.
 Replace predator guard.
The Royal house is similar to the Highrise.  Simply remove predator guard, and set vial on its side underneath the peaked roof.
If you have a Lodge- without the predator guard, or the Chalet with a predator guard, space needs to be created for the vial containing cocoons.  Remove one set of trays, insert vial above trays and replace vial with tray when all bees have emerged.
Lodge without predator guard.
Chalet with predator guard.
Unwrap bundle of nesting trays by removing electricians tape.  Remove
one set of trays, and re-tape remaining nesting trays.
The vial can now be inserted under the roof and adjacent to the nesting tunnels.

Replace the predator guard of the Chalet after vial has been set
inside the house.  When all bees have emerged- about 2 weeks
after first bees emerge, remove vial, tape up the individual tray
 and set above other trays.
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