the best way i have found to water my plants is to use a chop stick and use it just like you are making brownies, if you pull it out and it feels damp of has soil stuck to it, then you dont need to water.if it is dry then water it. another thing i did was waited till the leaves slightly wilted, documented the day i watered on and wait till it wilted again and then i know how many days i can go, and i still check with the chop stick as it gets closer to the wilt date as sometimes they will need more or less.