- Strain: Mystery Seeds, - Flower: 4th week, - Indoor grow, - Light is a small 150w: 17in from canopy, - Soil: FFOF, - Fabric pot: 5gal, - Tent: 3'x3'x6', - Humidity: Right now it's at 50% but coming out of winter in Michigan it's been dry af. I'd say average humidity has been around 42%, pH: Going in at 6.6, coming out at 6.2, - PPM: Sick plant runoff is 1400. - Transplanted from 3 gal fabric to 5 gal fabric right before flipping to flower. No nutes added until yesterday. Yesterday fed 1/4 of general hydroponics 3 part basic. 6 days ago I fed a half dose of Cal-Mag. I knew she would be hungry for something soon, was actually surprised ocean forest lasted until week 4, ppm's are still high though, so I'm a little confused on that front.
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Looks like calcium deficiency. I'd do a full dose every watering until it bonces back, Unfortunately those spots won't go back to normal; they will be there for the rest of the plant's life. More info: https://www.mrgrowit.com/post/calcium-deficiency-in-cannabis-plants
Potassium usually starts signs at the edges, not always but most of what I've seen. Calcium deficiency could cause spots but I suspect phosphorus deficiency.
I kinda thought it was potassium related but aren't my ppm's a little high?