A topic from AEG's L5R CCG Rules forum, copied for Oracle of the Void from a copy of the forum saved in October 2015, so pages it didn't save are missing. Players' names are left out; the rules officials are named. Rulings are as they stood on these dates; later rulings, the rulebooks and the Rules Archive may differ.
Overflowing Fields Region Singular • Farm Cannot enter play if a Region is attached to an adjacent province. Reaction: After you refill this province, bow this card: Look at the card in this province. If it is a Holding, you may turn it face-up.
Forgive me for asking a simple question, but just to be sure: Can Overflowing Fields' reaction trigger from refilling the province immediately after Overflowing Fields is turned over in the Events Phase and attached to the appropriate Province?
Can Overflowing Fields' reaction trigger from refilling the province immediately after Overflowing Fields is turned over in the Events Phase and attached to the appropriate Province?
Yes.