To write you my recent experience of same case. We used last autumn
those seed, and few days ago we pull it out. Also during spring we use
it as young (for salad). Time of sowing the same as garlic which is
planted from cloves. It was smaller than regular ones (from cloves), but
now is also little smaller than regular. But all of them from seed are
almost identical size - interesting. Also when we took it out it looks
healthier than regular ( in a last 2 months we had a LOT of rain). But
we will see how it will hold on during winter - in a storage. I didn't
mention that it also made cloves. This autumn we will plant again some
rows from cloves some from seed from regular garlic, and some seed from
garlic which came from seed, also we will plant cloves from garlic from
seed. So little experimenting makes it more interesting.
Once long time ago (I was a kid) we planted it from seed but it didn't
make cloves, just only one bulb- little smaller than normal garlic bulb,
maybe that was garlic for spring planting. I didn't try it ever again,
now as you drove this question, I'll try this too in spring.
Here is classic continental climate (hot summers, cold winters, rainy
springs)-but it's not strictly as it was, i believe this is result of
global warming.
Where is "here"?
I tried planting them one year and got some garlic from them, but it was
very small and not really worth the effort.
I always break off the seed stalks as soon as I see them. It makes the
plant concentrate on the garlic head rather than expending energy on the
flower. This makes larger heads, which is what I want from my garlic. If
you get the stalk before it gets too large, you can chop it up and use
it in cooking for a light garlic flavor.
If you have a lot of the bulbils, you might plant them in a clump and
use the resulting greens in the spring for an early garlic garnish.