I suspect that for some of the plant crops, the timing depends on latitude. Stuff grown in Italy or Spain will tend to be available sooner (and perhaps have a longer range of availability) than stuff grown in Britain and Scandinavia.
Under greens -- turnip greens! And possibly mustard greens as well, which may have a different growing season than most greens. How about cresses (such as watercress)?
Under fruits -- cranberries/lingonberries and other members of that family. Possibly including blueberries but I don't know for sure.
under other veg -- asparagus (where it was available in period). I don't know if cauliflower would fall under cabbages (group 1) or not.
no subject
Under greens -- turnip greens! And possibly mustard greens as well, which may have a different growing season than most greens. How about cresses (such as watercress)?
Under fruits -- cranberries/lingonberries and other members of that family. Possibly including blueberries but I don't know for sure.
under other veg -- asparagus (where it was available in period). I don't know if cauliflower would fall under cabbages (group 1) or not.
Grains -- oats (in Scotland/Ireland anyway)?