Every grower wants healthy plants. But how do you actually measure plant health? In many greenhouses, plant health is still judged mainly by visual signals: leaf colour, plant strength, growth speed or general crop appearance. Experienced growers can read a lot from these signals. But visual observations alone rarely tell the full story.

Brix is more than a number. It provides insight into plant vitality, resilience and metabolic balance. This article explains how Brix measurements relate to plant health, why values differ per crop, and how tools like the Leaf Brix Chart help growers move from reacting to understanding.

Plant health knowledge is growing, but applying it in practice remains challenging. The Eh–pH diagram by Olivier Husson shows how plants, pests and diseases each thrive in specific zones.

The Plant Health Pyramid by John Kempf shows that pests and diseases are not the cause, but the result of deeper imbalances in plant energy, nutrition and metabolism.