Help -

Note: 1/3-1/4 refers to the volume of the pot, of course.

Exciting! I had a similar problem, but less pronounced and with Autoflower. I suspect it's a combination of several factors: - A past over-fertilization with nitrogen. It takes a long time without cursing for the plant to compensate for that. I see very dark green leaves. So that could be the case. - Rapid nitrogen uptake can lead to a sudden change in the pH level in the soil. - If the watering isn't optimal during soil cultivation, it can lead to the following overall picture: A pH level outside of 6.2-6.5 in soil can cause other nutrients, especially micros like Ca, Mg, Zn, Fe, etc., to be affected. If the watering in fabric pots isn't completely saturated, pockets can form where salts and nutrients accumulate, leading to a sudden surplus. My solution: Reduce nitrogen significantly and focus on moderate fertilization with bloom fertilizer, emphasizing phosphorus and potassium. Initially, give a strong dose of CalMag with a product that also contains all other trace elements. Then, switch CalMag to a preventive concept. Strictly monitor the pH level of the nutrient solution. Water 1/4 - 1/3 of the pot and also measure the pH level of the runoff. Let the soil dry out well before watering again. Adjust the pH level during the next watering if the runoff is poor. It might make sense to flush with 10 liters of pure water and CalMag in the right pH range at the beginning. Summary of symptoms: Nitrogen over-fertilization, possibly a deficiency in Ca and Mg, pH level off, possibly too little K and P.

One of my 4 plants is showing the exact same problem, although not as bad as yours. I've been able to improve it significantly by applying the following things: - for the affected plant, I add about 1ml of Calmag agent from Canna per liter of water with each watering (a corresponding supplement from other brands works too) - I use warm tap water and let it cool down a bit: calcium deposits dissolve better in warm water, which also increases the calcium content in the watering water - calcium tends to be better absorbed at a higher pH, so I'm aiming for 6.5-6.6 for the affected plant (currently growing in soil). Unfortunately, I don't have a device to measure the pH of the substrate, but I can imagine that it was generally too low for me The affected plant is still showing some deficiency symptoms, but nowhere near as bad as at the beginning. At least the buds look good on yours, so I wouldn't worry too much about the harvest. Good luck! 🌱

Nitrogen toxicity, salt build up, problems with calcium and magnesium. Thats your resiume. Feed less, water with run off, dont let them stand in it, collect it and throw out and main thing - watch ph !!! Third grow should go way better then.