Bumblebees are the hairy fat bees that work in the garden furiously even if you do not want them there. However, while you may be apprehensive given their ability to sting, they actually have a well defined place in the garden pollinating, working, and fertilizing plants so that they can produce nuts, seeds, fruits, or flowers. The bad news is that bumblebees are in trouble of going extinct and if this happens you can expect your garden productivity to gradually decrease along with the bee population as well.
There are a few things that you can do to help prevent this from happening if you want to protect the bees and protect the future of your garden starting with offering them rich plants to eat from. Outside of just offering nectar you may also want to think about altering your garden a bit so that it is more suitable for them to live and breed in so that can start to increase their numbers and start to turn around their population. This is due to the fact that bumblebees live in holes that are buried in the ground and there are a few changes you can make that will encourage them to nest inside of your garden.
By doing so you will offer the bees a safe place to lay and hide their eggs. After laying the eggs the bees will stock up with food and supplies to make it through the winter so that come spring the bees will be grown up and the young queens will be able to head out to make new nests continuing to increase the bee population in your garden and the world. While you may think that the last things you want are nests in the garden, it is actually during the food gathering process that the bees pollinate flowers so this is actually an excellent time to draw bees close.
The simple task of building and placing nesting homes around the gardens or other spaces that you may have in your yard you can help make sure that bumblebees have a safe place to hibernate and live so that they can start to rebuild d their numbers. As mentioned, the benefit to humans who make this effort is the fact that the bees will then pollinate any nearby crops, gardens, fruit trees, or flowers helping your garden to produce much better. The idea is also not that farfetched as old farmers used to often make homes for bumblebees to live in out of clay pots for this very purpose.
These gardeners understood that the bees were very helpful in the garden and thus did everything within their power to encourage them to take up residence in their gardens. If you want to use a clay pot the best size is usually a ten inch pot that is turned upside down. Of course, to make sure that this is a suitable home you have to make sure that the pot has a hole in the center of the base so that the bees can easily get in and out of their new home. To help encourage the bees to head to the home fill half of the pot with old moss for bedding or if you have any mouse nests around with some of the bedding from these since the smell attracts bees.