Fall (Autumn) is when I would say the bulk of the harvest comes in. Maincrop Potatoes and carrots, beans plus 'tree crops', apples, pears, nuts etc.
Spring is always the problem (its called the hungry gap), you can't really grow anything of any size that soon after winter, and biannuals are wanting to flower.
The internet tells me I'm in zone 7, but quite exposed, so I guess not that different
I think they actually tended to overcrop the soil, in the UK the yields were starting to fall in 44/45 because the soil was starting to become exhausted.
That has guides and stuff for gardeners of the time