@angua, the farms are not all 8 hour cycles
The small farm is 45 pumpkins, 1 per 8 hours.
The common farm is 80 pumpkins, 1 per 4 hours.
The noble farm is 100 pumpkins, 1 per 1 hour.
The noble farm only needs just over 4 days for total harvest, not too hard to get that buffed most of the time.