How do I get wheatgrass seeds?

Hi, I plant wheatgrass at home, I wonder if they will flower or something so that I can always have wheatgrass seeds and don't have to buy them again.

How do I get wheatgrass seeds?
The seeds will grow on the top of blade after grass gets tall enough. You can then mow the grass, and keep these tops because they are your new seeds. The grass should continue growing taller with more seeds, and you repeat.
Reply:If it isn't cut it will go to seed.