Coco coir is one of the most popular growing media for indoor growers. It holds water and air well, but it contains very few nutrients of its own, so your plants depend on what you feed them. A clear coco feeding schedule makes that easy. In this article we show how to feed coco with Rhodos powder nutrients, from clone to flush.
Why coco needs its own feeding approach
- Feed with every watering. Because coco supplies little nutrition itself, you give a complete nutrient solution every time you water. The Rhodos instructions do the same: apply the Rhodos solution with every watering for a constant supply of nutrients.
- Calcium and magnesium. Coco growers pay close attention to calcium and magnesium. In the Rhodos system, Rhodos Base supplies calcium (26% CaO) and nitrate nitrogen, while Rhodos Grow and Rhodos Bloom contain magnesium (5.8% and 5.4% MgO).
- pH in the right range. For coco, rock wool and hydro the target pH is slightly lower than for soil.
The Rhodos coco 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 coco / hydro / aero | 5.8 | 5.5–5.8 | 5.8–6.2 | 6.0–6.4 |
This coco feeding schedule is based on 100 L of water. Source: the Rhodos grow schedule (PDF). Growing in another medium? See the hydroponic feeding schedule (also for aeroponics) or the soil feeding schedule.
How to mix your coco nutrient solution
- 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 range for your phase.
- Water your plants directly from the reservoir.
Not working with 100 L? The Rhodos nutrient calculator converts the schedule to your own reservoir size.
Coco 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. You can also pre-soak your propagation medium – see 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 pH 5.5–5.8 for coco.
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 pH 5.8–6.2.
Flush
At the end of the cycle the schedule uses plain water with an EC below 0.1 and pH 6.0–6.4.
Feeding coco with a feeding computer
If you use a fertigation system or feeding computer, Rhodos can be prepared as stock solutions, so you can follow the same coco feeding schedule automatically. Contact us for the Rhodos stock solution schedule.
Get started
Want to try this coco 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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