Hi all. I got some seeds from a friend and wanted to give it a try. I used the wet paper towel method to sprout the beans on a plate and placed them in small cubes. When the roots poked out of the bottom, I moved it into bigger cubes and watered with regular water. At what point can I start using nutrients and/or sea kelp in my watering regiment? I'm new to this so any input will be appreciated. Thanks!