The Grower’s Toolbox
Ten free, science-backed web apps for hydroponic and aeroponic growers — diagnose crop problems, dial in nutrients, light, VPD and cost, and plan your harvest. No sign-up, and every formula is shown.
- Open formulas
- Runs 100% in-browser
- Peer-reviewed targets
Showing all apps
Free Tools & Calculators
Hydro Doctor
Pest & nutrient deficiency diagnostic tool. Answer a few questions about your plant and get an instant diagnosis — deficiencies, root rot, pests, and more.
Conversions & Reference Hub
EC, PPM, temperature & unit converter. Convert EC↔PPM, °C↔°F, L↔gal, kg↔lb — and check EC, pH, and temperature targets by crop.
Plant Selection Tool
Crop selector by pH, EC & system. Shortlist the best crops for your setup — filtered by pH range, EC target, and growing style.
Hydroponic Nutrient Calculator
Reservoir dosing & NPK ratio finder. Get exact dosing for every growth stage, scaled to your tank size and target EC.
Hydroponic Yield Calculator
Harvest estimator per sq ft / cycle. Estimate fresh and dry harvest weight from plant count and grow conditions.
Water Efficiency Calculator
Water usage & savings tracker. Track water use and savings per crop, and compare systems against soil growing.
Aeroponic Mist Timer Calculator
Mist-on / mist-off cycle optimizer. Tune ON/OFF misting cycles per crop and growth stage to keep roots oxygenated and hydrated.
Hydroponic Cost Calculator
CAPEX, electricity & ROI estimator. Model setup costs, power, and consumables to estimate ROI and cost per gram over time.
Grow Light & VPD Calculator
PPFD, DLI & vapor pressure deficit finder. Find PPFD, daily light integral (DLI), and VPD targets for your grow space.
VPD Calculator
Vapor pressure deficit finder. Turn air temperature and relative humidity into the VPD that controls how fast your plants drink — and get the humidity you need for your crop’s target.
Frequently Asked Questions
Everything you need to know about the MistCulture Grower’s Toolbox.
01 Are all ten tools really free to use?
Yes. Every app in this toolbox is free — no subscriptions, no paywalls, and no account required. The formulas and target values are shown on each tool so you can verify the math yourself.
02 Do I need to create an account to use these tools?
No. All ten apps run entirely in your browser. Nothing is uploaded, nothing is saved, and there is nothing to sign up for.
03 Can I use these tools on my phone or tablet?
Yes. Every app is responsive — the card grid above collapses from three columns on desktop to two on tablet and one on mobile, and each tool adapts its inputs and results the same way.
04 Where do the formulas and target values come from?
Targets are drawn from published plant science and industry reference values — for example, EC and pH ranges by crop, VPD ranges by growth stage, and DLI targets by species. Treat them as solid starting points; your cultivar and environment may need fine-tuning.
05 Which tool should I start with?
Not sure? Start with the Plant Selection Tool to shortlist crops for your setup, then use the Nutrient Calculator and Grow Light & VPD Calculator to dial in the environment. If your plants look unwell, run them through Hydro Doctor first.
Disclaimer: All tools are provided free for educational use. Target values are general guidelines — actual needs vary by cultivar, environment, and growth stage.