When temperatures cool to 60°F/15°C, Summer Leaf bees will have completed nesting for the season.

Summer Leaf bees hibernate as delicate larvae inside their leafy cocoons over the fall and winter. So, to protect them from pests, you'll want to remove, protect, and store the nesting materials to keep the hibernating bee larvae safe from parasitic wasps, ants, birds, and other predators.

IMPORTANT: Summer Leaf bees cannot be stored in the refrigerator like mason bees. Make sure to read Protect and Store below to learn what to do with your Summer Leaf bees at the end of the season.

Remove

Summer Leaf bees have usually completed nesting by late summer or early fall—temperatures depending. Once you no longer see females moving in and out of your bee house or daytime temps drop to 60°F/15°C, it's time to remove the filled nesting materials from the bee house.

If you have reusable wood trays: Wait until you no longer see females moving in and out of your bee house, or daytime temps drop to 60°F/15°C, before removing the wood trays.

If you have natural reeds or cardboard bee tubes with Inserts: Although, it is possible to remove individual-filled nesting materials as soon as you see the leaf-capped end; we don't recommend doing so unless there is evidence of predators. Summer Leaf bees use visual cues to locate their nests. If you shift nesting materials around, the nesting females may become disorientated and abandon their nests. 

If you decide to remove filled tubes, make sure you replace them with empty ones and keep all the other tubes in the same place, so active females can locate their specific nests. We also recommend you swap in the evenings to help females reorient the minor changes when they begin flying again in the morning.

Protect

Place all filled nesting materials in a breathable, translucent bag, with the leafy-capped ends face up. The bag will protect the developing bees from hungry predators. Placing the leafy-capped ends face up will help ensure the egg and developing bee stay on top of the pollen loaf (bee food).

Pro Tip: If rodents are an issue, place nesting materials into a thick plastic or metal chew-proof container. Don't forget to add a few air holes to the container.

Store

Store the filled nesting materials in an unheated and unair-conditioned garage or shed until harvest time the following spring. If you don't have an unair-conditioned indoor area, they can remain outside but must be protected from the rain, snow, and predators. The development of Summer Leaf bees is temperature-dependent, so make sure you store the bag in a dry area with natural outdoor temperatures. Regularly check the bag for the first few weeks and look for any parasites that may have emerged. Kill any pests and parasites to keep them from attacking your developing bees. They tend to fly to the top of the bag, so you can place your hands on either side of the flying insects and rub them together roughly.

In the spring, you'll want to harvest cocoons. Harvesting Summer Leaf bee cocoons is a quick and easy way to ensure a healthier bee population! 

Pro Tip: To extend the life of your bee house, uninstall and store indoors over the fall and winter.

Products to Support Your Beekeeping

We are pleased to carry the Crown Bees products you need to follow the steps in this article.

• Cocoon Comb
• HumidiBee Cocoon Humidifier for Mason Bees
• CleanBee