1. pH 9 blocks almost all major nutrients.
In soil (or All-Mix–type media), when pH is above ~7.0, most micronutrients (Fe, Mn, Zn, Cu) become chemically unavailable.
So even though nutrients are present in the soil, the plant can’t absorb them.
2. High EC / PPM = salt stress.
When the nutrient solution has too many dissolved salts, the osmotic pressure outside the root rises → water actually flows out of the root cells → burned or deformed leaf tissue.
You see this as pale speckling, leaf curling, and slightly burned leaf tips (exactly what’s visible in your photos).
Symptoms that fit this explanation
Slight leaf deformation or waviness
Light speckling or spots
Older leaves affected firstNew growth still green and healthy
This all points to a pH / nutrient shock, not a virus or pest problem.
What to do now
1. Flush the substrate
Use standing water adjusted to pH 6.2–6.4.
Flush with about 2–3 × the pot volume (for a 13 L pot → roughly 25–35 L of water).
Goal: wash out excess salts and bring the root-zone pH back to neutral.
Measure the drain pH – it should settle around 6.3–6.5.
2. Then re-water lightly with a mild solutionAfter flushing:
Wait 1–2 days until the soil surface starts to dry.
Then feed with a light nutrient mix (¼–⅓ strength):
pH: 6.2
EC: 0.6–0.9 (depending on tap water)
3. Optional: stabilize with calcium/magnesium
This helps buffer the pH and prevents secondary deficiencies.
4. Observe new growth
Within 3–5 days you should see flat, healthy green new leaves.
The older, damaged ones won’t recover — that’s normal.
Big up and keep growing ganja farmers💚😍🙏