Actually I too enjoy watering, I had this installed so it gets watered when my wife and I are traveling. I don't have a gardener and I have found that a
good majority of Thai folk do not know how to properly water trees, shrubs and lawns. They sprinkle it and call it day because they see a cloud in the sky and say it's going to rain.
Enjoy the graduation ceremony. I didn't see the Jesus Slippers set out by your wife.