Ok, so the perlite should not be the issue. Are you pH'ing your nutes? Are you measuring EC or PPM also? It is hard to overwater a hemp but your gals look down. What are the temps in your grow room and how close are the lights to the plants? Could be heat stress too. Also, is that RockWool i see there? Did you you rinse it off before germ? because rock wool can fuck up pH too i think.
Yea, Autos don;t really tend to need full strength nutes from what i have seen and through my own experience. i started really light at like day 10 or 12 I think, then worked up to 1/4 then up to 1/2. never went over 1/2. For additives, it depends on which. i add about 1/4 tsp EarthJuice Cal-N-Mag with every feed/watering. In late flower, I addedCha-Ching (a bud booster, high Phosphate).
On my final plant (which is Photo, not auto BTW) i have the feed regimen as follows each week.
4 x per week Molasses Water with CalMag
2 x per week Nute regimen +CalMag
1 x per week Cha Ching water (roughly 1/8tsp to 96oz water)
Guess I should have given you my entire setup. I must add that I have never run into any issues as of yet with my photos.
Ph nutes down to 5.8ph using r/o water as the base. Ppms I measure and have been about 450-650 (American) with the 1/4 strength dose.
Running two Amare Technologies SS 150's in tent (2x2) with 135cfm exhaust and passive intake. Temps hit high of 83 low of 71(lights off).
Yes, I soak rockwool for 24 hrs usually (5.5ph) before popping the soaked seedin the rw. Come to think of it, I had a rw cube look funny before I placed the seed in it. So I dropped a new cube into the water for maybe 10 mins...that prolly fucked my ph big time!! Didn't even think about that...think that's it?
My cal mag dose was low too which didn't help at all...going to give 1/4 tsp per liter now on of cal mag plus nutes.
