My Wedding Cake auto from Barney’s Farm has just started to show some yellowing leaves. Actually the veins are yellowing first. I am at day 66 and it looks like I am going to go way past a suggested 70-75 days grow. I think maybe I have fed a bit too much. Going by Tang’s and Dr. Autoflower’s Advanced Nutrient schedule and watering regimen. Do you think I should do a flush now? I am in ProMix HP. Thank you for any guidance.
Wedding Cake yellowing
- Thread starter skudra
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Also, I am using R/O water with 4ml of CalMag per feeding.
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I have no advice to give unfortunately, just wanted to say nice plant!
Looking good overall, I'm not a seasoned expert yet but 4ml of cal/mag every watering seems a little excessive but I could be wrong. Maybe lighten up by half on future waterings and see if that helps.
pH: ~6.2 in ProMix HP
Problems could come from:
a) Too much added salts, all that cal-mag, both blocking uptake of other nutes and disrupting the pH Perfect activity.
b) Your citing a specific pH for feeding suggests you are adjusting the pH of your feed source or post-mixed water, with AN pH Perfect (using RO or other low ppm/salts water to begin with) not meant to be adjusted, involving just adding more salt(s) that disrupt the pH Perfect function. Unless recently changed (would be major), AN does not ever instruct adjusting pH with pH Perfect nutes, but does very strongly recommend (simply should use) RO or other low salts water. [And notice AN official feed schedules, despite all the supplements thown in, do not include use of cal-mag, even their own. If cal-mag is needed using pH Perfect, I foliar feed it].
c) And/or ramping slowly up and feeding at <2 mL/L, less than 1/2 strength, until day 40 may not be enough nutes. I generally use ≥2.5 mL/L of parts A and B.
a) Too much added salts, all that cal-mag, both blocking uptake of other nutes and disrupting the pH Perfect activity.
b) Your citing a specific pH for feeding suggests you are adjusting the pH of your feed source or post-mixed water, with AN pH Perfect (using RO or other low ppm/salts water to begin with) not meant to be adjusted, involving just adding more salt(s) that disrupt the pH Perfect function. Unless recently changed (would be major), AN does not ever instruct adjusting pH with pH Perfect nutes, but does very strongly recommend (simply should use) RO or other low salts water. [And notice AN official feed schedules, despite all the supplements thown in, do not include use of cal-mag, even their own. If cal-mag is needed using pH Perfect, I foliar feed it].
c) And/or ramping slowly up and feeding at <2 mL/L, less than 1/2 strength, until day 40 may not be enough nutes. I generally use ≥2.5 mL/L of parts A and B.
I actually never manually adjusted the ph. The Advanced Nutrients always put me in the 6.2 range. Most likely, I gave it too much CalMag. I thought since I was using R/O water and was under LED lights that I might need to use more CalMag to make up for loss, but I guess I overdid it. I am close to harvest, so not a huge deal. Lesson learned. Thank you for the tips.
I wonder why the bud structure is so small? It did shoot up like a bean pole, but the buds never took off. I see other Wedding Cake autos with much bigger buds. My other plant, a Zkittlez was fed the same amount of nutrients and CalMag but she is building up some very hearty buds. Maybe just genetics and it didn’t like the addition of CalMag and the other plant didn’t mind it.
