So here's a bit of an experiment: garlic on the left (orange arrow) was planted by pushing in to a finger poker's depth. So maybe 2 inches. I think it has all come up, and is maybe a hand high. The garlic on the right (purple arrow) is planted one trowel deep, so maybe 9 inches. Some has come up, it's about 1 inch high. I am still seeing new nubs poking up each day. But experienced gardeners in the region say that the fall nubins don't matter so much, what we want is for the seed-clove to push out a big healthy root system right now. That way it will form a few large flavorful cloves in the spring.
Hopefully I will post follow up pics in the spring and harvest time