Guide topic
Hydroponic Nutrients
Plain-English, source-cited guides to mixing hydroponic nutrient solutions.
Guide
Hydroponic nutrient calculator
Convert EC↔ppm (500/640/700), decode fertilizer labels, and look up N-P-K-Ca-Mg targets by crop — free, interactive.
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Guide
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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Guide
Hydroponics ppm chart
EC-to-ppm conversion on both scales at a glance, plus quick ppm ranges by crop — printable.
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Guide
Hydroponic nutrient targets by crop and stage
EC and nutrient targets for lettuce, herbs, tomato, cucumber, strawberry — and how they shift by stage. Includes a free printable PDF chart.
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Guide
Hydroponic tomato ppm & EC schedule
ppm, EC and pH for tomatoes by stage — seedling to fruit set — and why high EC invites blossom-end rot.
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Guide
MasterBlend & General Hydroponics ppm chart
Mixing ratios per gallon for MasterBlend 4-18-38 and the GH Flora series — and the ppm they really hit.
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Guide
Can you make your own hydroponic nutrients?
Yes — the practical three-part salt mix vs. blending individual salts from scratch, with the recipe and what each takes.
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Buying guide
The best hydroponic nutrients (2026)
brand-by-brand on the salts and blends worth buying: MasterBlend, Jack's, and the General Hydroponics Flora series.
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The app for this
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.