Leaves curling up means heat or light stress. Curling down often means dissolved oxygen below 3.8 mg/L. Use curl direction and leaf age to find your cause.
Plant Problems
Nutrient & System Failures
Yellow leaves, brown tips, pH swings: what the symptoms are telling you and how to get the system back on track.
Yellow leaves in hydroponics mean root rot or a nutrient deficiency, and the fix for one worsens the other. A 60-second root check tells you which you have.
Hydroponic plants wilt even in water when roots can't absorb oxygen fast enough. Here are the 4 causes of wilting and the exact steps to fix each one.
Hydroponic leaves turning brown? Four causes look similar but need opposite fixes. Learn which leaves to check, then apply the right correction.
Yellow hydroponic leaves usually mean nitrogen, magnesium, or iron deficiency, or pH lockout. Use leaf position and vein pattern to find which one.