Tea?

My father called me the other day, all excited about the results he was having by watering his tomatoes with tea water. He says they are shooting up and he has left one poor plant as a control subject to see if it really works...says it is way smaller than all of the other ones. I hope he sends me some pics to post. Will see if I can get him to take some and also to let me know if it is a particular formula he is using.