Double harvest during autumn, double Q growth during spring?

[Agrik]

That's all, IDK what to add.

Maybe this will compensate absence of farming in winter. Maybe this is applicable not only to farming.

[MooCow]

I like the idea of making it 50% bonus output in the fall and 50% bonus speed on the spring. That would add up to give you the shortfall you get from winter

[Fostik]

Yeah, speed bonuses would be neat. Also they will cover disability to plant crops during winter.
Not sure about doubling, but more output on autumn, and faster growing speed during spring would be reasonable, same for trees.