I got two bonsai mum of Somango x Lavender. They are both in 1/2 gallon sqaure pots with organic amendments. I got Plant-Tone, Lime, and Gypsum. The Plant-Tone has all the essential nutrients. They are about 3 months old. I trim them every few weeks and the look healthy. When I checked on them this morning one of them had crispy leaves all over. I don't get it. What could caused this? rootbound, def., etc.... The plant should be getting a well balanced of nutrients so I couldn't see her being defficient. I been watering with distilled water but watered her with tap water last watering. The other mum is fine and healthy looking. It's not overburn or overwatering, any help would be appreciated.