I am basically a noob but i have decided I want to house mason bees this spring so I have build a house that is a foot tall 5 1/2 inches deep and 5 inches wide. It has a little storage area up top and has a roof that sticks out 2 or so inches. I have also got tubes that have a 5/16 inch opening. I plan on making them different lengths and adding sticks and other stuff so it doesn't just look flat. I don't know if that matters really but why not do it lol. I have placed it 5 feet above my garden bed that has flowers that come back every year. the problem area is I don't know whether to buy cocoons or not. I've read sites that say yes and sites that say no. I never really intended to buy them cause I like starting off small with a few and working my way up over the years but who knows I might have to find a source to kick start or if anyone has any extras. anyway thank you for reading this any tips or help is appreciated a lot.