hydrolyzed
Active Member
So I'm on my first coco grow in years, coming from DWC...
I'm using House and Garden Coco A+B, Drip Clean, Cal-mag, and Hydroplex for a root innoculant.
6ml/gallon coco A/B (directions call for 9.5ml/gal at week 4 but it seems redic. high EC wise), 3ml/Gal cal/mag (which I stopped last week, didnt see any interveinal chlorosis), 0.5ml/gal drip clean.
I'm running two strains, in 5 gallon pots on day 23 flower. One of the 10 is showing bad yellowing of all the fan leaves, and all the others are starting to show what I believe to be either a K deficiency or nute burn. I checked the runoff the past few waterings and it has always came out 0.2 lower, to 0.2 higher than what was put in, so I don't think it's burn? The leaves match the K Def pics in the sick plant guide, so I started adding 4ml/gal Hydroplex (0-10-6) to up the K, and the problem plant is still yellowing away, while the other 9 are still having the problem with their older leaves.
The EC of my solution after the cocos and hydroplex is about 1.4, 700ppm. I was reading in the House and Garden thread that a good recipe is 6ml/gal AB, 4ml Gal Hydroplex...and thats what I am running...and seeing this yellowing issue.
My pH going in is 5.5-5.8, runoff pH is 6.0 to 6.5..(I know coco runoff pH isn't accurate, just posting it anyways)
Am I misdiagnosing my K def and it's actually over feeding? Or maybe it's really a Cal/Mag def that I just don't have the experience to see? I stopped adding Cal/Mag because I remember years ago in coco I stopped adding it at week 3 because the coco would be "full" of mag by then...if that makes any sense, I forget the science behind it..... I hope the pictures can let some of you experienced growers help me out.
The pic of the whole tent, the problem plant is in the back right corner of the photo...you can see it's fan leaves are very yellow compared to the surrounding plants...the runoff is the same, maybe a little higher, than the surrounding plants...not sure how over feeding would cause uniform yellowing of fans though.
Thanks a lot.
I'm using House and Garden Coco A+B, Drip Clean, Cal-mag, and Hydroplex for a root innoculant.
6ml/gallon coco A/B (directions call for 9.5ml/gal at week 4 but it seems redic. high EC wise), 3ml/Gal cal/mag (which I stopped last week, didnt see any interveinal chlorosis), 0.5ml/gal drip clean.
I'm running two strains, in 5 gallon pots on day 23 flower. One of the 10 is showing bad yellowing of all the fan leaves, and all the others are starting to show what I believe to be either a K deficiency or nute burn. I checked the runoff the past few waterings and it has always came out 0.2 lower, to 0.2 higher than what was put in, so I don't think it's burn? The leaves match the K Def pics in the sick plant guide, so I started adding 4ml/gal Hydroplex (0-10-6) to up the K, and the problem plant is still yellowing away, while the other 9 are still having the problem with their older leaves.
The EC of my solution after the cocos and hydroplex is about 1.4, 700ppm. I was reading in the House and Garden thread that a good recipe is 6ml/gal AB, 4ml Gal Hydroplex...and thats what I am running...and seeing this yellowing issue.
My pH going in is 5.5-5.8, runoff pH is 6.0 to 6.5..(I know coco runoff pH isn't accurate, just posting it anyways)
Am I misdiagnosing my K def and it's actually over feeding? Or maybe it's really a Cal/Mag def that I just don't have the experience to see? I stopped adding Cal/Mag because I remember years ago in coco I stopped adding it at week 3 because the coco would be "full" of mag by then...if that makes any sense, I forget the science behind it..... I hope the pictures can let some of you experienced growers help me out.
The pic of the whole tent, the problem plant is in the back right corner of the photo...you can see it's fan leaves are very yellow compared to the surrounding plants...the runoff is the same, maybe a little higher, than the surrounding plants...not sure how over feeding would cause uniform yellowing of fans though.
Thanks a lot.
