

Why is the middle of my tray growing unevenly?
I just recently grew a tray of dill micros that did the same thing as the cilantro. It seemed to not grow fast in the middle and have an uneven canopy. Is there something I’m doing wrong? How can I fix this?
For context: two lights are 50000k and are eight inche away from the trays, soil medium is coco coir that gets watered with 350 ml of water twice a day, they get one round of ocean solution at 1 ounce, the temp of my room is 74°-77° and the relative humidity is a stable 45% and the fan is on the lowest setting. The light cycle is also 16 on 8 off.