Hey folks! I’ve noticed that three of my clones have started developing yellow leaves with a pinkish red coloring on them. I’ve never seen this before. Any idea what could be causing it? The closest I could find on grow weed easy was it could be a Molybdenum deficiency, but my runoff pH is fine.
Medium: Soil (one plant is in FFOF, the others are a local 420 blend)
pH runoff: 6.1-6.3
TDS runoff: 150-300
Nute line: FF Dirty Dozen
Lighting: Vivosun 300W equiv LED (18/6 photoperiod)
Strains: LSD and Chocolope (both clones of my own making)
That was one of the charts I consulted, but there’s nothing on there about red or pink on leaves that I saw. Interestingly, Molybdenum deficiency according to Grow Weed Easy’s Cannabis Doctor has red/pink leaves as a symptom but it’s not reflected in that chart you shared. However, GWE says that Mb deficiencies are usually caused by pH being too low, rather than a lack of Mb in the soil. But my runoff is between 6.1 and 6.3 for each of the affected plants, so I don’t think that could be it.
Oh interesting! I wouldn’t have guessed that. My pH is 6.1-6.3 and TDS is 150-300 (ranges because there are 3 plants affected). I think my TDS is a bit low for this stage of growth. The mother plant and initial clones also never had this issue; maybe these second gen clones are a bit more sensitive? There is also necrosis on some of the leaf edges, which is consistent with your diagnosis. So I’ll try increasing P and K nutrients and see if it helps. Thanks @Myfriendis410!