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- #61
Both of the plants are in cyco coco coir with perlite, I've never actually tried a soil grow. Is it the same with coco? Should i be alternating?
Do I bother?
- Thread starter Jdsurfer
- Start date
Both of the plants are in cyco coco coir with perlite, I've never actually tried a soil grow. Is it the same with coco? Should i be alternating?
Emilya Green
Well-Known Member
oh, ooops... excuse me... should have checked again. coco is not soil... here it is appropriate to feed every time.
Emilya Green
Well-Known Member
so we are back to adjusting the feeding rate or making sure you are using the correct proportions for this week of the grow
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- #64
Phew haha
Yeah there has been a bit of guesswork in my measurements to be honest so probably my fault and overdosed. The main thing I'm worried about at this point is all the lower leaves dropping off, seems to be impacting the fan leaves the most.
Emilya Green
Well-Known Member
how many?
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- #66
I'll wake up with another 2-3 every morning, all at the very bottom of the plant. You can see it happening to that front one in the pics.
Emilya Green
Well-Known Member
They just turning full yellow and withering off?
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- #68
Not completely yellow, just a pale green. You can see the contrast of that dying fan leaf in the pic next to the one with suspected thrips
Emilya Green
Well-Known Member
Well, the symptoms describe a major nutrient deficiency and since it starts with the older leaves and continues to move up the trunk it is clearly a mobile nutrient deficiency. This points to potassium and phosphorus. Everything you have told us though says that you are giving the correct nutrients in the correct percentages for this stage of the grow and at the correct pH. Something however is not right. You are describing a slowly starving plant. I am as perplexed at this point as you are. Somewhere in all of this an assumption is being made that is incorrect.
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- #70
I was kind of thinking Phosphorus as well but at the same time that's why I was considering root bound since multiple signs of deficiencies that shouldn't be there can show up. I also thought that'd explain the drooping lower leaves.
It just seems weird that I have these signs of deficiency when the nutes haven't had issues covering those bases before and I've been meticulous with my pH.
Emilya Green
Well-Known Member
It wouldnt hurt anything to uppot really, but I don't think that is it. It appears to be a lockout of some kind though. I wish someone else would chime in with an idea.
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- #72
Just confirmed your guess of the leaf damage to be thrips, caught one in the act! I've only just noticed the damaged leaves though so I think it's a relatively recent infestation. I'm gonna get some neem oil and sticky traps tomorrow.
I mean would it be worth it? Do I have the potential of saving the plant and stopping these symptoms or would it only set it back. Hard decisions, so much guess-work
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subliminal
Well-Known Member
This single act of intelligence to me is proof that plants are sentient - @Emilya
This might be going on my tombstone
This might be going on my tombstone
Emilya Green
Well-Known Member
If you dont follow this through and figure it out, the next grow will be an unknown... even if you lose the plants in the struggle but eventually figure it out, you gained in the process.
subliminal
Well-Known Member
And now I am gonna chime in, and although my knowledge is limited in comparison to some of the help you have going on here a new eye never hurts..It looks like you have some sort of nute lockout going on. Did you over compensate in any form with your Potassium? This would lead to most of the issues I am looking at in your pictures. I am seeing possible iron and magnesium deficiencies, which could be brought on easily with excessive K.
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- #76
I've actually been adding small amounts of PK 13/14 to my water just due to the plant beginning bloom. The problem was there before I was adding that though so I think what may have initially been the issue was my pH was too low and that caused the lock-out. I've corrected it since then and even flushed with pH'd water because I was adding epsom salts and was advised not to haha, after the flush is when the burning potassium/phosphorus deficiency symptoms up top started to show. Magnesium deficiency definitely seems appropriate for the lower leaves but it's just weird now that I've got these new symptoms up top.
Literally every grow brings up new issues, the last was nitrogen toxicity
subliminal
Well-Known Member
Just remember, Potassium is a "MOBILE" nutrient and if it is a deficiency with a mobile nutrient, you will see it move up the plant accompanied with yellowing most the time.
subliminal
Well-Known Member
I am contradicting myself with the nute lockout and over-use of K and with what I just posted. But it's important that you know if you are seeing problems moving up a plant that you realize it's a mobile nutrient problem. It narrows down your search. I didn't read your mention of it's movements until you replied to my post.
subliminal
Well-Known Member
Here is a good off-site guide that I used to learn to tell the difference between the two from Michigan State University... I'm a Michigan guy myself, all Blue and I took this with a grain of salt, but it's good and simple
Mobile or Immobile?
Mobile or Immobile?
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- #80
Thanks for that, I'll have a read of it. I think what I'll do at this point may be another flush to eliminate nute lock-out potential, I'm just hoping that won't make any potential deficiencies progress... Such a balancing act, full of trade-offs
