The coco coir cannabis feeding schedule is a high-frequency, low-strength fertigation plan with pH between 5.8 and 6.2 and regular runoff. Because coco coir holds water but drains fast, you feed daily or multiple times per day instead of waiting for the medium to dry out.
coco coir vs peat moss for cannabis
Why Coco Coir Needs Its Own Feeding Plan
Coco coir is made from coconut husk pith and fiber. It behaves more like hydroponics than soil. It has high cation exchange capacity, which means it can hold onto calcium and magnesium and release sodium and potassium. That is why most cannabis growers using coco coir add a cal-mag supplement from early veg through mid-flower. Because it drains well, nutrients do not linger, so you can feed more often without overwatering.
Coco Coir Cannabis Feeding Schedule by Stage
These are general ranges. Adjust based on plant response and runoff measurements.
- Seedlings and clones: Very light feed, EC 0.4 to 0.8, pH 5.8 to 6.0. Fertigate once every 1 to 2 days. Keep the medium moist but not soaked.
- Early veg: EC 1.0 to 1.4, pH 5.8 to 6.0. Start daily fertigation. Include cal-mag.
- Late veg: EC 1.4 to 1.8, pH 5.8 to 6.0. Feed once or twice daily depending on pot size and evaporation.
- Early flower: EC 1.6 to 2.0, pH 5.8 to 6.2. Increase frequency to 2 to 3 times daily.
- Mid to late flower: EC 1.8 to 2.4, pH 5.8 to 6.2. Feed 2 to 4 times daily or use a drip system. Flush with pH-adjusted water every 1 to 2 weeks if salt builds up.
- Ripening or flush: Reduce EC to 0.4 to 0.8 or use plain water for the final 7 to 10 days if desired.
How to Measure and Adjust pH, EC, and Runoff
Always measure the EC and pH of your nutrient solution before feeding. Also measure runoff. If runoff EC is more than 0.3 to 0.5 higher than input, reduce feed strength or increase runoff. If runoff pH drifts below 5.5 or above 6.5, flush the medium with pH-adjusted water and re-check. Keep a log of input and runoff values for each feeding.
benefits of coco coir for weed
Common Mistakes with Coco Coir Feeding
- Treating coco like soil and letting it dry out.
- Skipping cal-mag.
- Using too high EC in early stages.
- Not watering to runoff.
- Ignoring pH drift.
- Reusing coco without buffering it first.
Final Tips for a Reliable Schedule
Start with a nutrient line designed for coco coir. Follow the label but reduce strength by 20 to 25 percent at first. Monitor plants daily. Adjust frequency based on pot size: smaller pots need more frequent feeding. With practice, you will read the plants and the runoff numbers instead of a fixed chart.