I am a fairly new grower. I have successfully grown one Autoflower. She produced about an oz. I started that grow under a blurple light that was gifted to me. Later, I bought 120w led quantum board, which is what I am using now. I had little to no understanding of the difference between organic growing and synthetic grows. I also had no idea what microbes are or the importance of an healthy rhizosphere.
Now, I am on my second grow. To give you an idea of my set up; I am growing in a 28”x28”x5’ grow tent. So I’m only growing one plant at a time. At the moment, I’m growing Apex R1 by Ethos genetics. In week 4 of vegetation. Under the Vivosun VS1000. With a 3x3 coverage. I am in the vegetative stage so this light will do for now. Moving forward we plan on upgrading our light to the MarsHydro TSW 2000.
I have really been able to dial in on the RH/Temperature. Using a combination of a ventilation and exhaust fan, a humidifier and clip on fans. Also, I added a Mushroom CO2 bag.
The plants are doing great so far. I did have a few concerns a couple weeks back. When I started to notice some yellowing in the new growth. This got me to thinking about what the issue could be. I determined it had to be a PH issue or the slow release amendments hadn’t broken down yet. This got me thinking about microbial activity in the soil. Then I connected the dots and determined that the PH balancing solutions I had been using were not organic. So this led me to believe that the PH up and down by general hydroponics was killing my microbes.
I set out a recovery plan and bought some microbes from TPS Billions. I semi flushed my soil by simply watering with water for the next 3 waterings. Once that was done I mixed a feed simply using FoxFarms Big Bloom. The very next watering I introduced new microbes to the soil. Here I am a few days later.
The plants bounced back way before I was through this recovery plan because I don’t think that was the issue. But all together I am glad that I stopped using the chemical PH solutions. From now on I’m using microbe friendly solutions.
Below I’ve added a photo of the yellowing from before and a current photo.
Can anyone identify what caused the yellowing?