Grains keep for a year or so and only if you have good storage for it, something that requires a lot of space and logistics for very high magical yields.
I wish logic and common sense trumped the rules more often, but more often then not I find the reverse is true, especially if a PC wants to do something.
What, you don't want the PCs to build a motte and bailey in a matter of hours instead of weeks?
Why would a druid whose life's purpose is preserving and enhancing nature want to instead use his gifts granted by said nature, to preserve and enhance nature killing civilization?
Farms arent necessarily nature killing, the Roman Farm included an irrigated garden, willow plantation, olive orchard, meadow, grain land, forest trees, vineyard and an acorn woodlands and encouraged nymphs to visit. A druid who sees people as part of nature and farming as a way to boost productivity of the surrounding lands should be happy to help.
properly stored grain in a granary could last up to four years with good cycling. Its also important to remember that hard bread and fermented grains (ie Beer) were important rations as beer in particular allowed Grain to be stored indefinately.
No, as it turns out.
Because it may become a civilization that lives in harmony with nature.
I mean can the fighter swing an axe to cut down a tree?
Then when that happens, the druids will be happy and help. They're not going to help destroyers of nature on the off chance that some day they will change.
Then he never had the intense love of nature to become a druid in the first place. That's like saying, "Well, I'm so dedicated to justice that I became a paladin of devotion, but I help my brother murder people, because family sticks together." Someone so dedicated to preserving nature that nature itself is granting him power isn't going to sacrifice that belief for his brother.
The farms aren't necessarily nature killing. People who eat the food are. The Romans paved over a lot of nature to get their armies from place to place. They destroyed a lot of habitats to build their cities, garrisons and forts. They destroyed a lot of nature by killing animals and mining and smelting metals for their pleasure and soldiers.
