i dont know if any of you could advise me but i have 4 seedlings growing strong and healthy and another 4 looking like its has a nitrogen deficiency (yellowing of stem, stunted growth)
I have only recently started using grow a (i know, i knw, i shouldve been using a & b) with b, whereas before (for 10 days) i was only used grow b by itself. Now this is the weird part, if 4 of them have a n deficiency why do the others dont? They have all been treated the exact way, getting the exact same 12/12 light as the others, fed the same etc, but its only 4 of them with it.
Any feedback would be appreciated.
Edit:
Actuaaly through more research, their are indications it may be over feeding.
A quick run down of how they look: Yellowing at end of leaves, one seedling leaves are sorta curling upwards, another ones leave is beginning to turn a bit crispy like its dead, and stunted growth
I feed like every 2 days although sometimes the rockwool is still wet. I just dont understand why 4 are good and another 4 are stunted?!!!