Late Orange Bud Auto grow outdoor and greenhouse

Week 3 full growth phase: Day 15: The plant will now remain completely outdoors, except during heavy rain when it will be moved to the greenhouse. I'm still unsure if I should top the plant. If I decide to do it, I will perform it as gently as possible to minimize any delay in growth. Day 16: Until 5 p.m., we enjoyed some really nice weather. However, after that, all hell broke loose with heavy rain and thunderstorms here in Germany. I had to rush to bring her back into the greenhouse for protection. Day 18: My lady made a good development over the last days. The weather is really nice. Some pest gave me problems with my other grow. I got to watch her closely that the thrips don't bother her also. I sprayed some neem oil the protect her from these assholes. Day 20: Today, I decided to top her, as I'm looking to experiment a bit with this grow. I did it as carefully as possible. I took my fingers and did only remove the small top of the plant so it was more of a fiming than topping. There should come out 4 new branches instead of just 2. Let's see how it turns out. I also gave her another feeding. I noticed the runoff pH was too low at 5.1. Unfortunately, I was in a hurry and couldn’t address it right away. To maintain a stable pH, I'll need to feed her more frequently. Tomorrow, I plan to flush her with water at pH 6 until the runoff pH is closer to 6. Update Day 21: Today, I addressed the pH issue. I used a 10-liter bucket with pH-adjusted water (6.05) to flush the coco. Surprisingly, the final runoff had a pH of 5.5. How did that happen? I checked the EC, which was very low at 0.36, indicating no significant salt buildup. It seems I made a similar mistake as in my previous grow. I had only watered with nutrient solution once every five days due to the size of the pot. Even though it wasn’t particularly hot and the coco stayed moist enough, could this have caused such a significant pH shift?