Week 4 questions

I would slowly lead them in the direction of 550-700 ppfd (light intensity) and bring a humidity of 60%, I would adjust a temperature of around 23-25° Celsius I would :) LST definitely in autoflowers I hope I could help, good luck with the grow

What specifically are your questions? Your plant's brown leaf necrosis on lower growing fan leaves is due to an overly wet media. Most likely watering too frequently. This is very easy to do when a plant is young and doesn't have much of a root structure. Cannabis needs to go through wet and then dry cycles to grow correctly. Try using an inexpensive moisture meter to determine when to water. New growth suggests you've worked your way through the watering issue. It looks like your media has pulled away from the fabric pot in some areas. Fill that gap in with fresh soil. The air gap makes thoroughly wetting the media almost impossible. You want to thoroughly saturate your plants on each watering. Allow the time for the soil to dry back before watering again. Depending on pot size, this could be as long as 4-5 days and possibly longer in some situations. The last thing I noticed is your temperature and humidity are both too low to support robust plant growth. During veg, your VPD target should be about 1.0kPa. Your daytime temp during veg should be around 78F under LEDs. References to cooler temps which you received by the previous poster are for HID lighting. LEDs require slightly higher temps.

Hi, it looks like she's very strong in the light, and that's why the nodes are very small. You can start training now. I usually do it from day 14 to day 16. You can check it out and get an idea. After the seedling phase, I aim for a humidity of 55 to a maximum of 60%. The later it gets in flowering, the less humidity you should have, otherwise, the risk of mold in the buds increases. I also aim for a temperature between 20 and 24 degrees with the lights on and 17 to 19 degrees with the lights off. I've been doing it this way for a few years now and have never had problems with my automatics and actually have very good yields. For fertilization, I start with a nitrogen fertilizer, around NPK 7-3-5, starting from week 2 or 3 of the veg phase. They get one with even more nitrogen so they grow nicely, NPK 10-4-7. In flowering, I switch to one with more PK; I use one with values of 3.5-6-6 and add PK, which is 13/14, so they get plenty of PK and produce nice big buds. In the last 2 weeks of flowering, I then reduce the amount. I follow the chart that's always on the first page of my diaries. Good luck!