Rhodos Powder Nutrients
Rhodos by Gen200 is a line of concentrated powder nutrients: three water-soluble fertilisers – Rhodos Base, Rhodos Grow and Rhodos Bloom – that you dissolve in water to make a complete nutrient solution from clone to harvest.
Each product in the Rhodos line is designed for simplicity and efficiency, providing a straightforward approach to plant nutrition without compromising on performance. Rhodos is formulated for all types of growing systems, including hydroponics, aeroponics, coco and soil.
On this page you will find what is in each product, the Rhodos feeding schedule per 100 litres of water, how to mix the powders, and the available pack sizes.
The Rhodos 3-part powder nutrient system
Rhodos Base is the base powder fertiliser and is used in every stage. In the vegetative stage you combine it with Rhodos Grow; in the flowering stage you switch to Rhodos Bloom. Clones and seedlings get a lighter mix of Base and Bloom.
Rhodos Base
Concentrated base fertiliser · EC fertiliser 15-0-0
The foundation of the line, used from clone to harvest. A nitrogen and calcium source: 15% total nitrogen (14% nitrate nitrogen, 1% ammonium nitrogen) and 26% calcium oxide (CaO). Micro granules.
Rhodos Grow
Concentrated vegetative fertiliser · EC fertiliser 3-10-25
For the vegetative stage, together with Rhodos Base. Contains phosphorus (9.9% P2O5), potassium (24.6% K2O), magnesium, sulphur and EDTA-chelated trace elements. Crystalline powder.
Rhodos Bloom
Concentrated flowering fertiliser · EC fertiliser 1-14-27
For the flowering and fruiting stage, together with Rhodos Base. Higher in phosphorus (13.5% P2O5) and potassium (27.0% K2O), plus magnesium, sulphur and trace elements. Crystalline powder.
Composition of the Rhodos powder nutrients
Values in % weight/weight, taken from the Rhodos technical datasheets.
| Nutrient | Rhodos Base | Rhodos Grow | Rhodos Bloom |
|---|---|---|---|
| Total nitrogen (N) | 15% | 2.8% | 0.6% |
| – nitrate nitrogen (NO3-N) | 14% | 2.0% | 0.45% |
| – ammonium nitrogen (NH4-N) | 1% | 0.8% | 0.15% |
| Phosphorus pentoxide (P2O5) | – | 9.9% | 13.5% |
| Potassium oxide (K2O) | – | 24.6% | 27.0% |
| Calcium oxide (CaO) | 26% | – | – |
| Magnesium oxide (MgO) | – | 5.8% | 5.4% |
| Sulphur (S) | – | 9.5% | 10.3% |
| Boron (B) | – | 0.011% | 0.011% |
| Copper (Cu), EDTA-chelated | – | 0.007% | 0.007% |
| Iron (Fe), EDTA-chelated | – | 0.156% | 0.156% |
| Manganese (Mn), EDTA-chelated | – | 0.078% | 0.078% |
| Molybdenum (Mo) | – | 0.004% | 0.004% |
| Zinc (Zn), EDTA-chelated | – | 0.014% | 0.015% |
| Form | Micro granules | Crystalline powder | Crystalline powder |
Datasheets: Rhodos Base TDS · Rhodos Grow TDS · Rhodos Bloom TDS
Rhodos feeding schedule per 100 litres
The figures show how many millilitres (Gen200 Control) or grams (Rhodos powder nutrients) to add to 100 L of water in each phase. Dissolve the products in the order listed, from top to bottom.
| Dissolve in order | Clone | Vegetative | Bloom | Flush |
|---|---|---|---|---|
| 1. Gen200 Control | 15 ml | 15 ml | 15 ml | – |
| 2. Rhodos Base | 65 g | 100 g | 100 g | – |
| 3. Rhodos Grow | – | 190 g | – | – |
| 3. Rhodos Bloom | 125 g | – | 190 g | – |
| EC (mS/cm) | 2.0 | 3.0 | 3.0 | < 0.1 |
| pH hydro, aero, coco | 5.8 | 5.5–5.8 | 5.8–6.2 | 6.0–6.4 |
| pH soil | 5.8 | 5.9–6.2 | 6.0–6.4 | 6.0–6.4 |
Step-by-step feeding schedules per growing medium: coco, hydroponics and aeroponics and soil.
Want the exact amounts for your own reservoir size? Use the Rhodos nutrient calculator or download the grow schedule (PDF, EN/ES/DE).
How to mix powder nutrients
- Start with clean water. Osmosis water is preferred. If you use tap water, make sure the starting EC is below 0.4 mS/cm.
- Add Gen200 Control (15 ml per 100 L) and mix well.
- Dissolve Rhodos Base according to the schedule. Make sure it is 100% dissolved before the next step. Warm water (20–25 °C) dissolves the powder faster.
- Dissolve Rhodos Grow or Rhodos Bloom according to the schedule. Whether you use a mixer or a pump, always make sure the powders are fully dissolved before watering.
- Check and adjust the pH to the range for your medium and stage.
- Feed with every watering straight from your reservoir, for a constant supply of nutrients.
Always wear protective gloves and eyewear when handling and mixing fertilisers. More tips on our how to use page.
For every growing system
Rhodos powder nutrients are formulated for use in all types of growing systems:
- Hydroponics and aeroponics
- Coco and rock wool
- Soil
Only the pH target differs per medium (see the feeding schedule). Working with a feeding computer or fertigation system? Rhodos can also be prepared as stock solutions – contact us for the Rhodos stock solution schedule.
Why choose powder nutrients?
- Rhodos is a concentrated powder fertiliser: you dissolve it yourself, so you don’t buy, ship or store water.
- Stored closed, dry and between 8 and 27 °C, Rhodos has a five-year shelf life from the production date.
- One schedule for the whole cycle: Base in every phase, Grow or Bloom depending on the stage, with an EC of 3.0 through vegetative growth and flowering.
Rhodos and Gen200 Control together
The Rhodos feeding schedule includes Gen200 Control, our orthosilicic acid (OSA), at 15 ml per 100 L in the clone, vegetative and bloom phases. Add it to the water first, before the Rhodos powder nutrients.
Pack sizes and EAN codes
All Rhodos powder nutrients are available in 2.5 kg, 5 kg and 10 kg packs. Bulk packaging on request.
| Product | 2.5 kg | 5 kg | 10 kg |
|---|---|---|---|
| Rhodos Base | 8719189018141 | 8719189018134 | 8719189018004 |
| Rhodos Grow | 8719189018172 | 8719189018165 | 8719189018158 |
| Rhodos Bloom | 8719189018080 | 8719189018073 | 8719189018066 |
Frequently asked questions about Rhodos powder nutrients
What are Rhodos powder nutrients?
Rhodos is a line of three concentrated, water-soluble powder fertilisers by Gen200: Rhodos Base (15-0-0), Rhodos Grow (3-10-25) and Rhodos Bloom (1-14-27). You dissolve them in water to make a complete nutrient solution.
Can I use Rhodos in coco and soil?
Yes. Rhodos is formulated for hydroponics, aeroponics, coco and soil. Use the same doses and adjust the pH for your medium: for coco and hydro 5.5–5.8 in the vegetative stage and 5.8–6.2 in bloom, for soil 5.9–6.2 and 6.0–6.4.
In which order do I dissolve the products?
First Gen200 Control, then Rhodos Base, and only when Base is fully dissolved, Rhodos Grow or Rhodos Bloom.
What EC should my nutrient solution have?
Following the schedule, about 2.0 mS/cm for clones and 3.0 mS/cm in the vegetative and bloom stages, starting from water with an EC below 0.4 mS/cm.
Can I use Rhodos with a feeding computer?
Yes. For feeding computers there is a separate Rhodos stock solutions schedule. Contact us to receive it.
How do I store Rhodos?
In the original closed container, in a dry and cool place between 8 and 27 °C. Stored this way, Rhodos keeps for five years from the production date.
Where can I buy Rhodos?
Rhodos is sold through growshops and resellers. Want to try it first? Order a Rhodos sample pack. Shop owners can become a Rhodos reseller.
Try Rhodos in your next grow
Start with a sample pack of Rhodos powder nutrients, plan your cycle with the calculator, or stock Rhodos in your shop.
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