Buckets do work. Ask me; I know from experience. You are not supposed to leave the buckets on for days or leave them on when the sun beats upon them & the temps. rise much above freezing. That is where you made your mistake. Plants can be fried by that kind of action.
I am a strong believer in the simple fact is that what matters in this life is how we treat others. I think that's what living is all about. Not what I've done in my life but how I've treated others. ~~ Sharon Brown