Hello, Don't Starve gang. First of I wanted to say I really like the mechanics of the new RWYS update, and want to thank Klei for their good work. Since the combinations are abundant, and my memory is limited I decided to make a quick "giant crop reference sheet" that require 0 fertilization for everyone to use. Thanks for @Laknish docs for providing all the possible crop combinations. Also I would like to mention a great mod that helped to calculate the crops nutrients in real game time, it really saved me a lot of time without having to use commands. I hope you find that info useful.
EDIT: All these food combinations are achievable using the mod snapping tills. It's either grid 3x3 or hexagonal.
AUTUMN
WINTER
SPRING
SUMMER
All Giant Crop, Auto Nutrient Pairings (& Fertilizer Pairings) List By Lakhnish Monster
Gardeneer Hat Mod