Soil is the most forgiving growing medium: it holds water and buffers small mistakes. Still, a clear soil feeding schedule helps you give your plants the right nutrients in every phase. In this article we show how to feed plants in soil with Rhodos powder nutrients, from clone to flush.
What is different about feeding in soil
- Same doses, different pH. The Rhodos schedule uses the same grams per 100 L for soil as for coco and hydroponics. Only the pH targets are different: slightly higher for soil.
- A complete nutrient system. Rhodos Base supplies nitrate nitrogen and calcium (26% CaO), while Rhodos Grow and Rhodos Bloom add phosphorus, potassium, magnesium, sulphur and chelated trace elements.
- Measure what goes in. Check the EC and pH of the solution before you water, so you know exactly what your plants receive.
The Rhodos soil feeding schedule
The table shows how much of each product to add to 100 L of water in each phase. Dissolve the products in the order listed.
| 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 soil | 5.8 | 5.9–6.2 | 6.0–6.4 | 6.0–6.4 |
This soil feeding schedule is based on 100 L of water. Source: the Rhodos grow schedule (PDF).
How to mix your nutrient solution for soil
- Start with clean water, preferably osmosis water. With 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 completely. Warm water (20–25 °C) speeds this up.
- Then dissolve Rhodos Grow (vegetative) or Rhodos Bloom (clones and flowering) completely.
- Check the EC and adjust the pH to the soil range for your phase.
- Water your plants with the finished solution.
Mixing a smaller amount, for example a 10 L watering can? The Rhodos nutrient calculator converts the schedule to your own volume.
Soil feeding schedule phase by phase
Clones and seedlings
A lighter mix: 65 g Rhodos Base and 125 g Rhodos Bloom per 100 L, at an EC of 2.0 and pH 5.8. See also Clone with Confidence: Pre-Soak with Rhodos.
Vegetative stage
100 g Rhodos Base and 190 g Rhodos Grow per 100 L, at an EC of 3.0 and a soil pH of 5.9–6.2.
Flowering stage
Switch from Rhodos Grow to Rhodos Bloom: 100 g Rhodos Base and 190 g Rhodos Bloom per 100 L, at an EC of 3.0 and a soil pH of 6.0–6.4.
Flush
At the end of the cycle the schedule uses plain water with an EC below 0.1 and pH 6.0–6.4.
Gen200 Control in soil
Gen200 Control is added to the water first, at 15 ml per 100 L in every phase. It supplies silicon as stabilised orthosilicic acid. Read more in how to use Gen200 Control.
Other growing media
Growing in coco coir, hydroponics or aeroponics? See the coco feeding schedule or the hydroponic feeding schedule.
Get started
Want to try this soil feeding schedule yourself? Order a Rhodos sample pack, or read more about the Rhodos powder nutrients and what is in each product.
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