A few of my plants have this pretty hard leaf curl happening around the bud sites and coincidentally it looks as if their growth is stunted. All the leaves are green and healthy looking still but stunted growth and leaf curl. humidity was a bit high in the 65% range for a couple weeks but its good now. I am pretty new to using salt based nutrients, could it be build up?
They are on a drip system that waters 4 times for 33 seconds during a 12 hour day cycle. I also supplement with hand water for plants that need it. 30 gallon pots
Is this around week 4? And only on newer growth? If so I had same symptoms for 3 runs. It was pythium. The pythium makes it tough for roots to feed thus leading to salt build up. I would check out this stuff called oxidate or zerotol. sterilize the medium then soon after you can re innoculate with bennies.