I am very interested in a seasons mod, but I have a mostly plant-based survival gameplay approach that includes Spice of Life, and depending on how long the seasons are, I am likely not to do very well without greenhouses. A check to see if the crop is exposed to the sky and/or if it is connected to the open air (not sure if the second is a thing you can check in Minecraft) would be extremely helpful, and as there is a greenhouse on the Ranch in Harvest Moon: Island of Happiness, it is still within the theme of the mod group.

If this is already a feature, please add that information to the wiki- a lot of people will be much happier to use it if they know that. :-)