Skip the bottle maths and say goodbye to nutrient-burn guesswork. Below is your single-page, certified-organic program that carries your crop from seedling to sticky, terpene-rich harvest—no complicated two-part mixes needed.
Table of Contents
- Why Growers Trust Professor’s Nutrients
- Professor’s Nutrients Products & How They Work Together
- Professor’s Nutrients Feed Chart: 5-Week Veg + 9-Week Flower
- How to Dial In the Feed Chart
- Frequently Asked Questions
- Next Steps
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Next Reads for Dialing In Your Organic Hydro Feed Chart
If you want the easiest way to follow this chart without mistakes, these tools help:
Why Growers Trust Professor’s Nutrients
Certified-Organic Advantage
Every product in the line is OFC-approved, meaning it meets Australia’s strictest organic-input standards while remaining fully hydro-compatible.
Single-Part Convenience
Organic Grow is the single-part base nutrient for the vegetative stage, while Organic Bloom is the single-part base nutrient for flowering. The full program can then layer in Grow Fast, Flower Boost, Terpene Gold and pH control at the stages shown in the feed chart below.
Australian-Made Performance
Formulated for hot-climate, high-light conditions, the range is trusted from hobby tents to commercial rooms across the country.
Professor’s Nutrients Products & How They Work Together
Product Line-Up at a Glance
Memorise these five bottles (plus pH control) and you’re set for the whole run.
| Category | Product | Core Function | When to Use | Quick Call-outs |
|---|---|---|---|---|
| Base Nutrients | Organic Grow | Builds foliage & root mass with 72+ macro/micro nutrients | Veg weeks 1 – 5 | 2 – 4 ml /L |
| Organic Bloom | Drives flower formation & bud density | Flower weeks 1 – 9 | 2 – 4 ml /L | |
| Growth Accelerator | Organic Grow Fast | Extra N for rapid canopy expansion | Veg weeks 2 – 5 | Up to 4 ml /L |
| PK Kick-Starter | Flower Boost | Early-bloom PK surge for more sites & weight | Flower weeks 1 – 8 | 2 – 4 ml /L |
| Quality Enhancer | Terpene Gold | Amplifies oils, resin & aroma | Flower weeks 1 – 8 | 2 – 4 ml / 10 L |
| Solution Support | Organic pH Up / Down | Adjusts nutrient-solution pH | As needed | Check pH after mixing |
Base + Accelerator During Veg
Organic Grow is the vegetative-stage base nutrient. Grow Fast is layered alongside it during the vegetative weeks shown in the feed chart.
Base + PK + Terpene During Flower
Organic Bloom becomes the flowering-stage base nutrient. Flower Boost and Terpene Gold are then added during the flowering weeks shown in the chart.
Organic pH Control
Professor’s pH Up/Down is used to adjust nutrient-solution pH. Refer to the pH, EC & Reservoir Targets section below for the general target range used in this guide.
Professor’s Nutrients Feed Chart: 5-Week Veg + 9-Week Flower Schedule
Use the chart below as the baseline feeding program. “Water” means plain, pH-balanced water for the finishing stage shown in the schedule. Growing medium, source water, measured EC/pH and plant response may require adjustments, so use the chart together with the operating targets and FAQs below.
| Stage | Week | Grow (ml/L) | Grow Fast (ml/L) | Bloom (ml/L) | Flower Boost (ml/L) | Terpene Gold (ml/10 L) | Notes |
|---|---|---|---|---|---|---|---|
| Veg | 1 | 2 | – | – | – | – | Keep EC ≤ 1.2 |
| 2 | 2 | 2 | – | – | – | Tight internodes | |
| 3 | 4 | 4 | – | – | – | Rapid canopy fill | |
| 4 | 4 | 4 | – | – | – | Prep for switch | |
| 5 | 4 | 4 | – | – | – | Final veg push | |
| Flower | 1 | – | – | 2 | 2 | 2 | Flip Day 1 |
| 2 | – | – | 2 | 3 | 2 | Bud sites multiplying | |
| 3 | – | – | 2 | 3 | 4 | Raise EC to 1.6 | |
| 4 | – | – | 2 | 4 | 4 | Mid-bloom bulking | |
| 5 | – | – | 2 | 4 | 4 | Watch Ca/Mg | |
| 6 | – | – | 2 | 4 | 4 | Aroma intensifying | |
| 7 | – | – | 2 | 4 | 4 | Peak oil production | |
| 8 | – | – | 2 | 2 | 4 | Begin fade | |
| 9 | Water | Water | Water | Water | Water | 5-7 day flush |
How to Dial In the Feed Chart
Use the numerical targets below as the main technical reference for this article. For reservoir-based setups, empty and refill the reservoir weekly as described in the original program guidance.
pH, EC & Reservoir Targets
- pH: 5.5 – 6.5
- EC (Veg): 1.0 – 1.4 mS/cm
- EC (Bloom): 1.5 – 2.0 mS/cm
- Solution Temp: 20 – 24 °C
Frequently Asked Questions
Can I Run This Schedule in Coco?
Absolutely. Coco’s natural cation exchange capacity means you can bump EC by about 0.2 and keep runoff pH toward the low end (5.5 – 5.8) for best results.
Do I Need Extra Cal-Mag?
Whether additional Cal-Mag is required depends on the source water, growing medium, plant response and the nutrient program being used. Check your water conditions and the current Professor’s Nutrients guidance before adding a separate Cal-Mag product.
Is the Week-9 Flush Mandatory?
The feed chart shows plain, pH-balanced water during Flower Week 9 as its finishing step. If you need to determine whether that finishing approach should be changed for your exact growing setup, check the current Professor’s Nutrients feed-chart guidance rather than extending or intensifying the flush automatically.
Can I Combine These Bottles With Synthetic Boosters?
Stick to the organic line for best micro-life synergy; mixing mineral salts can disrupt nutrient availability.
Next Steps
- Get the full program if needed: View the Organic Grower Kit, including pH buffers.
- Keep the official guide handy: View the Professor Nutrients Feed Chart & Product Guide.
Track your readings: Log pH, EC and solution temperature so you can compare changes against the feed chart and operating targets above.
Next Reads for Dialing In Your Organic Hydro Feed Chart
Still fine-tuning your organic feed routine? These guides will help you lock in pH, EC, additives and nutrient strategy for cleaner, more predictable results.
- Hydroponic pH Control Australia
- How to Balance EC in Hydroponic Reservoirs
- Organic Hydroponic Nutrients Australia
- Hydroponic Nutrients & Additives Guide Australia 2026
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