Hello! Noticed discoloration "spots" on some leaves. Using reverse osmosis water (more info below). Thought maybe it's magnesium deficiency? Started adding Bloom City CalMag yesterday for first time. Any advice on what this is and how to address it? This is my first grow attempt. Thanks! What type of medium; soil or hydro? Soil What brand and type of soil? Fox Farms Ocean Forest Indoors or outdoors? Indoors What strain? Super Skunk How old are the plants? 6 weeks What type of lights and how many watts? Optic 8+ 500 watts How far from the lights? ~24-25 inches What is your watering frequency and source of water? 2-3 times per week What, how much and when was it fed? NPK? Alternating between plain water and Fox Farms Grow Big (2 tsp per gallon) and Fox Farms Big Bloom (4 tsp per gallon). Just added Bloom City CalMag yesterday (4 ml per gallon). Some lights have 5 plants total. This light has 4 plants total, 1/2 gallon total per light distributed evenly among the plants. What are the temps and humidity in the room? Temp range between 72 and 80, Humidity range between 45-57%. What size pots? 5 gallon smart pots Any bugs? None that I can see. Spraying Green Cleaner 2 times per week.
Fungus. How To Deal With Leaf Septoria (Yellow Leaf Spot) On Cannabis Plants - RQS Blog I think it transferred from water splashing on your soil and hitting your plant. You caught it so early I don’t even think you need to spray, but that is totally up to you.
I think you're on the right track, but it takes the cal mag a week or so to fix it...New growth should be OK...Damaged leaves won't heal,though...
