The Greenhouse Growers Toolbox App, a suite of 15 calculators, has been developed for commercial and hobby greenhouse or hydroponic growers for everyday system design or management use.

This updated app is intended to be an industry resource to meet the needs of growers, researchers, hobbyists, trainers, retailers, suppliers and advisors in the wider area of protected cropping. This is the third release of this app from Graeme Smith Consulting and it is planned to continue to make available additional calculators in the future.

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Please note: all app information is given in good faith however no liability is accepted for content or its application.

Screen shots of all the calculators

  1. Greenhouse Acid or Product Dosing
    Calculate treatment PPM or volume (litres) of various products/acids when added to water
  2. Greenhouse Area & Volume
    Calculate area (m²) or volume (m³) of greenhouse structures
  3. Greenhouse Boiler Fuel Cost
    Calculate and compare costs of various common greenhouse boiler fuels ($ per GigaJoule of energy)
  4. Greenhouse Hydronic Boiler Calculations
    Estimate minimum required greenhouse boiler size (in kW & MCal/hr)
  5. Greenhouse Dripper Timing and Volume
    Calculate greenhouse irrigation flows, rates & volumes (media-based dripper systems only!)
  6. Greenhouse Irrigation Pump Capacity
    Calculate required greenhouse irrigation pump capacity & maximum number of solenoid valves (media-based dripper systems only!)
  7. Greenhouse Irrigation Rate Targets
    Calculate greenhouse irrigation volumes based on area, dripper rates and light sum, and compare to actual irrigation volume delivered over the same period
  8. Irrigation Timings per J/cm2 Calculations
    Calculate how often (in minutes) you need to irrigate based on current radiation intensity (in W/m2 and reverse).
  9. Air Filled Porosity (AFP) Calculations
    Calculate approx growing media water content for pots/containers in %, based on weight in grams
  10. Greenhouse Radiation and Light Units
    Compare and convert common light (radiation) units used in greenhouse horticulture (inc. kLux, W/m2, J/cm2/h and mol/m2/h).
  11. Assimilation Lighting and DLI Calculations
    Convert and sum common light (radiation) units used in greenhouse and indoor horticulture: PPFD - DLI - Radiation Sum - Total DLI and reverse! (n.b. allows for both additional sunlight and/or artificial lighting if desired).
  12. Greenhouse Nutrient Deficiency Chart
    Use the flowchart to determine in a systematic way which element/s may be causing deficiency symptoms in the leaves. (Includes typical examples of leaf deficiency)
  13. Greenhouse Nutrient Feed Recipe Guidelines
    Standard feed recipe guidelines for both Open and Recirculation media-based hydroponic systems (in PPM and mmol/µmol) and includes most common greenhouse vegetable crops
  14. Greenhouse Nutrient Drain Reference Guidelines
    Enter laboratory analysis of your hydroponic drain water and compare to reference guidelines for your vegetable crop (in PPM and mmol/µmol) and includes automatic EC correction (in mS/cm)
  15. Common Elemental Conversions
    Converts common elements to/from pure form (PPM only!) and lists common atomic weights