Hydroponic Nutrients
Plain-English, source-cited guides to mixing hydroponic nutrient solutions.
Guides
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ppm, EC, and the PPM scales explained
EC vs ppm, the 500/700 scales, the 0.7 factor, and why two meters disagree.
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Hydroponic nutrient targets by crop and stage
EC and nutrient targets for lettuce, herbs, tomato, cucumber, strawberry — and how they shift by stage.
Crop: Hydroponic Calculator
Target ppm → exact salt weights (or brand-aware: MasterBlend, Jack's, General Hydroponics), per-crop/stage targets cited to Cornell & Penn State, EC/pH logging with drift warnings. Pay once, no subscription, works offline.