[JRG13]

Moisture has little to do with flower signaling. It's typically a temperature and day length respsonse. Some crops even need to reach a number of 'heat units' before flowering is initiated as well, others need cold vernalization. Water stress can initiate flowering at times but it's not ideal. Lot of plants fall under a short day or long day category as well but it's actually the length of darkness that's critical. Even short bursts of light at night can prevent flowering.