Selkotanswered grow question 4h ago This is typical of magnesium (Mg) deficiency, sometimes associated with an absorption problem due to pH or excess calcium/potassium blocking magnesium.
to fix it :
- Check the pH of your watering (Soil: 6.2–6.5; Coconut/hydro: 5.8–6.2)
- Add magnesium by adding a Cal-Mag supplement.
- Avoid excess: too many nutrients (especially K and Ca) can block Mg.
- Monitor progress: leaves that are already affected will not turn green again, but new shoots should emerge healthy within a week.
good luck!😊