Moby Dick Auto + Jack Herer Auto - Fastbuds

I am not entirely sure if I am happy with the current progress. Comparing the size of the plants, I think that during my last grow, the plants were bigger at this stage. However, in the end, they seem fine. I guess we will see in the next days and weeks how things develop. I am trying to figure out the differences between my last grow and this one: 1. The humidity is much lower. In the first three weeks, it has been around 40–45% during the day and 55–65% at night. During my last grow, it was consistently around 60–70%. 2. I have a new, stronger oscillating fan, which runs 24 hours a day indirectly in the tent. 3. I topped the plants on day 18 above the third node and did some LST. Maybe this caused too much stress because, one day later, I noticed the first signs of pre-flowering pistils. 4. In my last grow, I watered only with rainwater. This time, I started with a 50:50 mix of rain- and tap water and added some Epsom salt and CalMag. Now, I’ve added a second wet towel in the tent to increase the humidity. I am trying to find the sweet spot for an optimal VPD value. Furthermore, I increased the LED light to 80% at day 21. I hope the plants will stretch more this week so I can do a bit more LST and make them wider.