Measure and adjust pH and EC correctly: soil pH 6.0–7.0, coco/hydro 5.5–6.5 — high pH causes iron deficiency, low pH blocks calcium uptake.
pH VALUE BASE:
Soil: 6.0-7.0 (slightly acidic to neutral)
Coco: 5.5-6.5 (acidic)
Hydro: 5.5-6.5 (acidic)
pH TOO HIGH (over 7.0):
Symptoms: Iron deficiency, yellow new leaves
Solution: Add pH-Minus (phosphoric acid) drop by drop
pH TOO LOW (below 5.5):
Symptoms: toxicity, brown leaf tips
Solution: Carefully add pH-Plus (potassium hydroxide)
EC VALUE (nutrient concentration):
Seedling: 0.4-0.8 EC
Vegetative: 0.8-1.4 EC
Flowering: 1.4-2.0 EC
pH meter: 20-50€, calibrate daily
EC meter: 15-30€, with TDS display
Drop tests: €5, less accurate
1. measure and adjust pH value
2. Add nutrients
3. Check EC value
4. Check pH again
PROFI-TIP: Always pH first, then nutrients! Measure daily for hydro.
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