Clydia, I usually just wing it in my garden. I don't take gardening that seriously. it should be fun. if the soil looks dry and the plants look wilted, then it's time to water but I never let it get to that point. luckily I have well drained soil. some areas of my garden are much dryer than others as the soil is a bit sandy. after planting my tubers I did not water. I let mother nature do that for me. after almost a month and very slow growth I decided to give everything a drink. 2 days later they were coming up. I supposed they needed some encouragement. some tubers are up more than others. they weathers hasn't been that great either. the end of the week will bring much warmer temps so I'm hoping the rest of the slow pokes catch up.