Help day 50 yellowing

Grow Cycle Seedling
7

In my opinion, testing ph and ppm is absolutely key to a consistently successful grow! Once your soil, water, and feedings ph range goes above or below the recommended range, you start getting nutrient lockouts and can even become toxic to plants. If I were you, I quickly get the instruments you need for testing. Go on YouTube and get some quick lessons on optimal ph ranges and ppm levels for different stages of growth. Here’s some useful info to get you started. But only the basics, gotta learn all you can! And take notes.