Nutrients and care: keeping plants fed and healthy

The four things that actually determine whether your plants thrive: what you feed them, the pH, the light, and how quickly you spot a problem.

What plants need, how to read a nutrient label, how to mix multi-part solutions, and how often to change the reservoir.

The two numbers worth measuring, what to aim for, how to test, and how to correct them with things you already own.

How much light plants need, how to tell if yours is enough, and what to buy if it is not.

Yellow leaves, brown roots, stunted growth, algae. Diagnose the symptom and fix the cause.