This is 100% your fault, or the fault of whoever planted the crops, SE gave us plenty of warning for the maintenance, we know it was going to be 48 hours well before the crops were planted, and you knew the crops took 10 days. SE should not have to hold our hand and tell us not to plant crops up to 10 days prior, they did their job, you did not.

My plants all survived just fine, I stayed up and watered them 5 minutes before maintenance started, and then logged in as the servers came love to water them again, no issues. They should be able to survive 48 hours without dying unless you let them go unhealthy once or twice before maintenance.