Grower's Resource Centre
Calculators, checklists, conversion charts, and free downloads to level up your hydroponic game.
Nutrient Solution Calculator
Calculate the exact amounts of nutrients to add for your reservoir size and target EC. Supports General Hydroponics, Canna, and more.
pH Nutrient Availability Chart
Visual chart showing which nutrients are available to plants at different pH levels. Print and pin next to your reservoir.
| Nutrient | 5.0 | 5.5 | 6.0 | 6.5 | 7.0 |
|---|---|---|---|---|---|
| Nitrogen | |||||
| Phosphorus | |||||
| Potassium | |||||
| Calcium | |||||
| Magnesium | |||||
| Iron |
Ideal hydroponic pH range: 5.5–6.5
Measurement Conversion Chart
Quick reference conversions for hydroponic measurements: litres to gallons, EC to PPM, Celsius to Fahrenheit.
| EC (mS/cm) | PPM 500 | PPM 700 |
|---|---|---|
| 0.5 | 250 | 350 |
| 1.0 | 500 | 700 |
| 1.5 | 750 | 1050 |
| 2.0 | 1000 | 1400 |
| 2.5 | 1250 | 1750 |
| 3.0 | 1500 | 2100 |
Grow Journal Template
Track pH, EC, temperature, plant health, and harvests across your entire grow cycle with our printable journal template.
| Date | pH | EC | Temp | Notes |
|---|---|---|---|---|
| —/—/— | ___ | ___ | ___°C | ____________ |
| —/—/— | ___ | ___ | ___°C | ____________ |
| —/—/— | ___ | ___ | ___°C | ____________ |
Australian Hydro Suppliers
Vetted list of Australian suppliers where you can buy nutrients, equipment, and seeds — with fast local shipping.
- Hydro Experts (AU) — Full range, fast shipping
- HydroShop Australia — Great nutrients selection
- Bunnings — Budget-friendly starter gear
- Lettuce Grow AU — Premium vertical systems
Plant-Specific EC Guide
Optimal EC ranges for 30+ common hydroponic crops. Bookmark this page for quick reference during nutrient mixing.
| Plant | Seedling | Veg | Fruiting |
|---|---|---|---|
| Lettuce | 0.8–1.2 | 1.2–1.6 | 1.4–1.8 |
| Basil | 1.0–1.4 | 1.4–1.8 | 1.6–2.0 |
| Tomato | 1.0–1.5 | 1.5–2.5 | 2.5–3.5 |
| Cucumber | 1.0–1.5 | 1.7–2.5 | 2.0–3.0 |
| Strawberry | 1.0–1.4 | 1.4–1.8 | 1.8–2.2 |
| Spinach | 1.0–1.4 | 1.4–1.8 | 1.6–2.0 |