Solutions
A yellowing plant is a symptom. The real cause could be iron deficiency from pH that’s too high, excess manganese blocking zinc uptake, or a nutrient solution sitting outside its ideal temperature range. The trouble with growing without soil is that when one thing fails, almost everything fails at once, and isolating the actual variable takes a method. The articles in this category are written for people who are already growing and just hit a problem beginner tutorials don’t cover.