I have been able to smell my grow coming into the neighborhood, probably 500 ft away. This was in a fairly open area though.
I would think the large number of trees would help some....but to what do degree is only a guess.
I was in peat mix, either Sunshine #4 or Berger BM6...I can't remember now. I usually watered once a day at around 1.4EC, during heatwaves I would water twice a day at 0.8 EC. Final pot size was 7 gallons.
Just run the main 3 part and use the rest to fertilize the lawn. I just harvested using Jacks and rainwater and the plant had green leaves right to the end.
Ballpark use for Calmag is 0.3-0.4 EC.
If you start with RO, find the dose that brings water to 0.3 EC, then add your required nutes.
Different brands will have different concentrations, so going by EC is your best bet.
Most people use phosphoric acid as pH down. The small amounts needed to adjust water won't have much effect on the plant. In the end you're just upping the phosphate in the water by a few ppm.
Plants look to be in a light mix with lots of perlite.
They aren't sitting in water or being watered too much.
Only thing I can think of is, are they directly on a cold concrete floor?
Took me a while to figure out why I was getting tons or purple deficient growth years ago.
After I added...
Looks like classic overwatered plants. I would get the growbags off the bottom of the saucer with same raised grating. You can also drain runoff from the saucer with a small transfer pump.
It may be counterproductive depending on where you do it. Large massive colas will turn in blobs of mildew in the cold damp areas like NE and the Pacific NW. In a place like Arizona I wouldn't see a problem.
The only thing that can go bad with soluble salts is precipitation. I would water them down with RO or distilled water. A less saturated solution will have less chance for fallout.
I always remember a hockey puck at the bottom of DynaGro when I didn't use it fast enough.
You need to divide the weight of each element by the total weight of the salts used.
A ballpark mix for a 55gal barrel would be 100-100-50.
Total weight in grams for each is 19.5N-18P-38K-19Ca-5Mg-6.5S.
Divide all elements by 250 for NPK and percentages of the salt mix.
8-7-15 7.5Ca 2Mg 2.5S
Organics are slow to break down and release nutrients. You may not see a difference by harvest time. Only thing that works immediately are soluble ferts like MaxiGro, Calcium Nitrate...etc. But that would not be an organic source of N.