We always plant garlic in the fall (Syracuse NY, zone 5.something). The
stalks start yellowing in early or mid-July, and we harvest in late July
or early August.

July is when we (often) get our best sun and warmth, and the rest of the
garden really takes off then - just when the garlic is falling over. I
wonder if we might be better to plant it in the spring, so it could
benefit from that time. A later crop would be OK, if it meant larger
heads.

Any thoughts appreciated.
Thanks,
George