Chances are, your bee hotel or bee house will attract a hole-nesting wild bee.

You might be surprised to find strange cocoons during your mason bee harvest in the fall or leafcutter bee harvest in the spring. We want to help your local bee population thrive - here are our expert tips that can help you understand your bee house guests.

Blue orchard mason bees (Osmia lignaria) are native bees that are active in the spring and are the perfect pollinators for blueberry fields.

Emerging from their cocoons in the spring, they fly in cooler and wetter weather than honey bees. Instead of living in a hive, mason bees live in pre-made holes and every female bee takes care of her own nest.

The spring is the best time to harvest leafcutter cocoons and harvesting leafcutter bee cocoons will reduce chalkbrood disease and Pteromalus, a very small parasitic wasp.

Adult leafcutter bees will emerge from the harvested cocoons and because they were allowed to emerge from loose cocoons they will not spread chalkbrood to their nesting materials. Leafcutter bees need the warmth of summer to develop into adult bees and this step is called incubation. Read our tips for harvesting and incubating summer leafcutter bee cocoons.

Your bee house is set up, the weather is warming, your fruit blooms are open, and your mason bee mud supply is ready – what happens when mason bees start flying?

This stage of raising mason bees is what I like to call Wait & Watch and it’s the best part of raising spring mason bees.

Wild hole-nesting bees, depending on their season, may start flying soon!

You have two options for taking care of your wild hole-nesting bees. First, you can harvest wild bee cocoons in the early spring, which requires more time and effort but you will be rewarded with getting to know your wild bee guests. The second option requires less time while still providing wild bees with fresh nesting holes each year.

Mason bees are named after masonry for a reason since female mason bees protect each nesting chamber with a wall of clayey mud.

If mason bees can't find clayey mud nearby their bee house, they simply won't nest and will fly away to find another site. Female mason bees carry a mud ball in their large mandibles (jaws) and they are looking for a mud that they can manipulate.

Releasing, or setting out, spring mason bee cocoons is easy and there are a few guidelines that you should follow to keep the bees happy and healthy.

• Spring mason bees need a minimum daytime temperature of about 55F/13C (don’t worry about nighttime temperatures) and they need open blooms to feed.

Native hole-nesting bees, just like any creature, have their own set of diseases and pests that, when left unchecked, can harm or kill them.

We know that our native mason and leafcutter bees are unable to clean out their nesting holes. Nesting holes should be opened once a year to remove diseases like chalkbrood (a deadly fungal infection) and pests like pollen mites (they eat the pollen loaf before the larvae can). At the very least, fresh nesting holes should be provided every year.

Sometimes, spring mason bees wake up before your fruit trees and berry plants start blooming. Don't worry, you can provide bees who emerged early inside of your HumidiBee with a couple of options. Includes how to set out cocoons.

Setting up your bee house for spring mason bees is easy and only takes a few minutes.

Here are our expert tips for setting up your bee house in a location that mason bees will love!