I have always planted "way too much" wild garlic. I plant them in my rose beds to deter aphids.
Then, the first year I only harvest about 1/3 to 1/2 of it. I leave the rest of the garlic in the ground to self seed and grow for the 2nd year.
The second year and thereafter, I have tons of garlic and I only harvest the huge stemmed ones and leave the littler ones. That way I never have to plant it again.
Did you know that you can freeze garlic? I just clean the bulbs and put them into zip lock bags. Then I toss the bag into the freezer. When I am making a stew or something, I take out what I need, rinse under the faucet and set aside for a few minutes. Then it is soft enough to be chopped or sliced.