Nachgereicht 2. Versuchsgrow

@Ultraviolet wow thanks for the detailed explanation. I have a Cloudline Pro6 Inline fan that exhausts the air and brings it out of the room through the window. I ventilate thoroughly 3-4 times a day for 5-10 minutes to bring in fresh air. According to your explanation, I could open the third opening for intake at the back of the box to let in even more fresh air. Then the larger, brighter ones at the back would also have fresh air directly with them. Otherwise, I can only increase the strength of the exhaust to have more exchange and get more moisture out. It usually runs at 3-6 depending on how high the humidity is. I also have an oscillating fan, and when I observe and feel it, I have very good air circulation everywhere. Even though the circulation at the bottom is also good, a second one wouldn't hurt and is already on the list. The leaf mass of the Blueberry Muffin is crazy, and even when I've taken a leaf here and there, it’s practically exploding in mass. I had noted to do a proper defoliation/lollipop around day 20-25 after switching to 12/12. Do you think that could significantly improve the transpiration issue you described? I will test the pH; it's all still new to me. I also think that's where the problem lies. Thanks for the detailed explanation🌱

@Mooncat I gave 55g of Greenhouse Power Feeding per plant for phosphorus about 12 days ago, so it should really be more about the pH not being right, right?

I watered 2 plants today, the other one was done yesterday, and I hadn't thought about measuring the pH of the drain yet. The smallest one and one of the big ones had minimal drain (50ml) after I watered them with about 4L each today, and the pH of the drain was 6.8 for both. It's still within range, but could it be that it was too high sometimes if my watering water had a higher pH of around 6.4-6.8? I would have expected the smallest one, which looks so good, to have a lower pH and therefore look better. Additionally, there's the comparison of the two big ones from this morning. I already watered one yesterday because it was drier (watering water pH 6.2), and it looks significantly better today than the other one. It seems to have gotten darker compared to the other, while the other one has developed yellow leaves at the bottom and looks lighter. (new pictures added above) Furthermore, the two big ones (the worse one more so) have purple/pink stems in the middle part of the plant, and I always thought that was genetic, but after some research, I also came across issues with the pH value. The smallest one has it only very minimally, and the stems are otherwise light green, which is completely normal. Many also said they are hungry and I should give them more grow nutrients. What surprises me is that I have slightly yellow leaf tips on all the plants, which have always shown up after giving Greenhouse Feeding, even back when I did a full dose of grow during repotting. They always recover without damage after about 10 days. Even now, 12 days after fertilizing with Bloom, they are still slightly visible, which is more typical of light over-fertilization, right? I just don't want to mess things up anymore, and since that might not have been visible in the pictures, I wanted to clarify that again. I can also send more pictures later tonight.

@Newt_Loop I followed the instructions from Greenhouse Feeding and gave 5g of Grow per liter of substrate as a one-time top dressing, thinking that the nitrogen in Bloom would be enough since it doesn't say anywhere to keep giving Grow. But since several people have said she's hungry, I'll keep an eye on it. It could be that the two bigger ones need more because they're larger than the little one, and that's the reason.

@Mooncat since I have to water now, I'm a bit unsure whether the pH is too high or too low. But I would lean towards it being too high. I'm going to water with pH 6.0 and see what the drain says..

Wow that is some quick flowering. It's nice to see a lot of Germans on Grow Diaries. If this is your second grow then your doing pretty well.

@all-our-small-plants thanks, I'm just a bit worried about the difference, otherwise the good ones are in top shape. I followed the instructions from Greenhouse Power Feeding and mixed 53g per plant under the final pot (that's 4.8g in the L substrate) and then it said that no more is needed until 8 weeks of Veg. I then gave 55g Bloom per top dressing per plant 12 days ago, which still has nitrogen, so I thought that would be enough.

@green-claws thanks for the assessment, I thought according to the information the nitrogen in the Bloom would be enough, but since several people have said they are hungry, I'll keep an eye on that. Thanks for the assessment and happy growing🌱