Lava Cake Auto #2

🌱: 💧: 4l SIP, addedsome 💡: Dli: 45 mol/m²/d 🤔: I'm still looking for the reasons for the leaf problems in the previous grows. I now think that it's a combination of several factors and I'm trying to solve the problems one by one. 1. Signs of over-fertilization and CalMag deficiency - Too much NPK for the Ca (78 mg/l) + Mg (22 mg/l) present in the tap water (16°dH). . 2. Light green leaves at the new growth at the beginning of flowering. I suspect an iron deficiency, like with my rhododendrons. - Too high pH 3. Dry buds and leaves in the upper part of the plants - Too intense light After I adjusted the amount of fertilizer and the light intensity, the over-fertilization symptoms were nearly gone, there was still the pH value, which could cause the suspected iron deficiency. I regularly tested the pH value with the usual yellow test strips. They are usually yellow-green, hence pH 6.5. I have now added vinegar essence (25% acetic acid) to the watering water. The test strips are now yellow, pH 6. Let's see if that helps.