My sweet potatoes are growing healthy and the extension of their vines shows that. For seeing how big the potoroos are, I digged some of them out. I got 2 sweet potatoes and they are as big as my hand having small roots around them. They are still young and I have to wait for at least a month. I've not cared the sweetpotatoes so much with watering them twice a week since they are so strong that they can grow in harsh environment with less care than other vegetables.
Therefore I don't need go to my gardening plot everyday during the Buddhism holidays thanks to the sweet potatoes.