Sounds fun, a few crops for in the Winter, when most stuff died and can't grow.
Some use Winter to have a calmer time, some would like something for that season, too, as in crops, outside of the Greenhouse.
I always plant the Winter Seeds, but crops are even more fun, imo.
Nice extra, and if there'd be some decent healing dishes that require these crops, then we can use those, while waiting for Spring.
And people who do challenges like not using the Greenhouse(or in year 1 without Red Cabbage), can also plant some crops, while doing other stuff.
Maybe start with a small list, like few crops from year 1 on already, and then year 2+ ones, and some far in the game.
Then having some quests requiring them is always nice.
I thought of having a special dish, quest, NPC, dungeon, clothing or anything else, that requires some from all 3 of these times(year 1, year 2+ and far in the game), so we'd need to keep some behind until far in the game and past year 1.
Traveling Cart shouldn't have it, so we'd need to earn it :D