Growing leafy plants (romaine lettuce, arugula, basil, etc.) in my kit setup. Sprouted them in organic tree bark-based grow plugs and placed the seedlings in the windowfarm. After about a week in the windowfarm, the plants’ leaves started turning yellowish and seem to be getting worse. Any idea what causes this and how I can reverse the process and get by plants in better health? Here are some ideas for possible causes:
-lack of sunlight
-some green algae growth in the water tubes and on the grow plugs
-over/under watering (currently set to water about every 90 minutes during the day, every 2 hours at night)
-too much/not enough nutrients (I use general use hydroponic nutrient powder)
Pictures of the yellow leaves are attached. Thanks for your help!