THCFarmer tools
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Grow tools, checked by real growers
Calculators and reference charts for the questions that come up every day in the forums. Each one shows the numbers, where they came from, and what members here actually run.
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Nutrients
Feeding schedules
Week-by-week doses for the big nutrient lines, scaled to your reservoir and strength.
Open → SoilSoil mix calculator
Scale a living soil recipe to your pots and get a shopping list, plus top-dress amounts.
Open → LightPPFD and DLI calculator
Light targets for every stage, and the daily light your plants actually get.
Open → WaterpH, EC and PPM chart
Convert EC and PPM on every common scale, and check pH and EC targets by medium and stage.
Open →Still not sure? Ask the growers.
Every tool here started as a question in the forums. If yours isn't covered, post it and the growers will weigh in.