Hi there I am new to Bonsai‘s. My wife and I have started bonsai trees this year because we are having a new baby girl and we want the trees to be the same age that she is as she grows up. I currently have three sprouts of pinus Aristada and have noticed one of the sprouts stems is changing color toward the bottom from brown to a light gray or white instead of green. Is this normal and can anyone explain trimming the taproot ?
I also have 3 Jacaranda Mimosifolia and 6 Picea Mariana sprouts. Any informed experience will be greatly appreciated.