Sort:  

We have several types of bees that are hive-less. The mason bee is large in size but is also used for pollination in gardens, particularly for fruit trees.

Nice, the bees come by themselves in the beginning or you need to bring them or maybe invite them in your garden? lol weird thought

They are native in most areas of the US, but we kick start them each year by buying 100 cocoons for each of the nesting blocks. When we get better at harvesting cocoons and storing them over the winter we shouldn't need to buy them any more. Eventually we would like to generate a little revenue off of them by selling some cocoons.

Oh its like cocoons family you buy, then enlarge the family size and then help others by selling some portion of it - interesting.