I'm a rookie home grower, this is my issue, I started 7 seeds, used the same dirt and fertilizer on them all and they were healthy plants, about 7 weeks in I notice lower leaves yellowing on 1 plant, all plants on the same water and light cycle. So I first treat plant like it's over watered, no help, so switched to under water treatment, no improvement, upper plant growth good but lower leaves continue to die to the point I have a tall with growth at the top. Tiny leaves start to develop where normal leaves have died, but they seem to be showing signs of nut burn, even though I'm not fertilizing anymore , it was a house plant, Ii put outside to let nature try to heal it, any suggestions appreciated.