2nd year growing a high CBD strain and one of my 3 plants have brown spots on the leaves and its spreading fast. The other 2 plants only have a few of the brown spots. Looked on the forums and don’t see anything identical but maybe I’m using the wrong terms.
Method: Soil (Pro-Mix)
Vessels: 5 Gal Buckets
PH of Water, Solution, runoff (if Applicable): PH 6.0 after using vinegar on tap water to bring it down
PPM/TDS or EC of nutrient solution if applicable: Not sure
Indoor or Outdoor: Outdoor
Temps; Day, Night: Day about 23 Celcius, night 12-15 Celcius
Humidity; Day, Night: Unsure
Ventilation system; Yes, No, Size: Wind
AC, Humidifier, De-humidifier,: NA
Ferts: ProMix Premium Organic Flower Boost 12-28-12
Size: Plants are in 4th or 5th week flowering, I topped them at about 5 feet tall.
Also of note, I have a bunch of tomato plants close that look like they have Leaf Septoria, but I can’t be sure of that one either. I thought maybe I could try some CalMag, but wanted your thoughts before giving that a try.
Thanks in advance