Keep the two measurements separate
EC is the chart’s electrical-conductivity reference for the nutrient solution; pH is a separate reference for acidity and alkalinity. The Monkey chart lists pH 5.5–6.5 throughout, including flush. Normal EC rises from 1.2 to 1.5 through veg, and follows 1.6, 1.7, 1.8, 1.9, 2.0, 2.1, 2.2 and 1.9 through the eight bloom weeks. Closed-room EC is shown separately. Record your actual readings alongside the appropriate chart row. No flush EC is supplied. Calibration procedures depend on your meter: follow its manufacturer’s instructions rather than a made-up routine here.
General pH guidance by medium
The Monkey chart’s published range is pH 5.5–6.5. Beyond the chart, the following are general guidance values only, not label or chart figures: in coco and in hydro or DWC the pH typically sits around 5.5–6.2, while soil usually runs a little higher, around 6.0–6.5. Check the pH after mixing and before feeding; in soil, compare the runoff with the solution you pour in.
Read the environmental rows
Temperature is shown as 20–27°C. Humidity is 70–85% through veg, then changes through bloom as displayed on the feeding chart. Keep the current week and correct EC row visible. Ask your stockist for advice if the grow does not fit the supplied schedule.
Good questions
Can I use Monkey in coco, soil and hydro?
Yes. Monkey Nutrients is designed for coco, soil and hydroponic growing, with Grow A+B for vegetative growth and Bloom A+B for flowering. Follow the feeding chart for your stage and chosen programme. Mag Cal: 1–2 ml per litre. Do not add it in the flush week. Feeding is the same in DWC and hydro.
Does it work with hard and soft water?
Grow A+B and Bloom A+B are designed for UK hard and soft water. Mag Cal supplies magnesium, calcium and trace elements and is particularly relevant for soft water, RO water and coco. Mag Cal: 1–2 ml per litre. Do not add it in the flush week. Feeding is the same in DWC and hydro.
