Thanks in advance! I’m in week 4 of flower. Photos show my leaf problem. Growing indoor in coco under a Mars Led, all Botanicare nutes, (Bloom currently). 3mm cal mag each water. Ph is always adjusted to between 6 and 6.5. Highest temp is 80. Lowest is 65. I water when the grow bag pot feels light and coco feels dry under 1st knuckle test. Was thriving until today. Plant itself is not droopy or affected…yet. Lovely flowers. I see the very tips show possible nute burn. I can cut back, but I only give half recommended dose. I will probably flush if no one responds. Also, I suspect the led light may have been too close? Could this be from that? There is nothing else I can point to. The pics aren’t as clear as I hoped. It’s like the leaves are darkening and the area around the veins are green, but lighter than when healthy. I also raised the led light. If you have a thought, please chime in. Could someone send a link to that poster that shows all the leaf problems? I can’t seem to find it. Thanks!
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Emergency help please. Leafs turning a color I cant find on the charts.
- Thread starter Spanky
- Start date
Rootsruler
New member
Coluld be either an Iron deficiency or spider mites.
Bluey
Well-known member
4th week of flower I'd be stopping calmag suppliments and replacing with PK suppliments and I'd be a bit tighter on pH, maybe 6.15 to 6.3.
Don't bother with the knuckle test on the coco. Water it twice a day if in a decent size pot and allow for a bit of runoff a few times a week. 10% to 20% of what goes in should be fine.
I flush my pots to clean out excess salts prior to flipping also,but I dont go overboard to minimise stress.
Reduce light levels until you have sorted the leaf symptoms
Don't bother with the knuckle test on the coco. Water it twice a day if in a decent size pot and allow for a bit of runoff a few times a week. 10% to 20% of what goes in should be fine.
I flush my pots to clean out excess salts prior to flipping also,but I dont go overboard to minimise stress.
Reduce light levels until you have sorted the leaf symptoms
Gingerbeard
New member
4th week of flowering seems early to be going this dark. But, yeah. More porn. We need the weed and the warts.
I also use Botanicare. One, half strength nute'ing beginning about 10 days above coco, full strength after, when the pots are light. A little more than full strength if they can handle it. Not dry light. Just light. Maybe every third day my 5-gallon bags get one gallon of liquid. I do not understand why people use less than recommended nutes unless they are showing toxicity. Letting coco go dry is not as good as keeping it a bit damp. Plants get nothing from dry coco.
Forget the knuckle test.
If I ever get that coloring, it is early veg or late stage flowering. I'll call it closer to 6 weeks for LSF autos.
So, maybe, early LSF because of only half nutes.
Bluey Water twice a day??? Why do you stop CalMag? Salt buildup in coco? Never had an issue with salts.
I also use Botanicare. One, half strength nute'ing beginning about 10 days above coco, full strength after, when the pots are light. A little more than full strength if they can handle it. Not dry light. Just light. Maybe every third day my 5-gallon bags get one gallon of liquid. I do not understand why people use less than recommended nutes unless they are showing toxicity. Letting coco go dry is not as good as keeping it a bit damp. Plants get nothing from dry coco.
Forget the knuckle test.
If I ever get that coloring, it is early veg or late stage flowering. I'll call it closer to 6 weeks for LSF autos.
So, maybe, early LSF because of only half nutes.
Bluey Water twice a day??? Why do you stop CalMag? Salt buildup in coco? Never had an issue with salts.
Bluey
Well-known member
Plants don't like calmag after about 3rd week of flowering because typically these are almost always nitrates and nitrates will block the uptake of P and maybe K which is what the plant needs in flower, not so much N.
What I'm seeing on those leaves is easily diagnosed as a cal deficiency but I think it is actually the start of a P deficiency which I have misdiagnosed previously as a calmag deficiency. Being in flower I'd treat for PK, that's my thinking.
What I'm seeing on those leaves is easily diagnosed as a cal deficiency but I think it is actually the start of a P deficiency which I have misdiagnosed previously as a calmag deficiency. Being in flower I'd treat for PK, that's my thinking.
Gingerbeard
New member
I'm going to consider your calmag argument. I don't know any different so I'm going to backoff on this grow. See what happens. Always looking for a tweak.
Nutrients disorders are tricky and hard to diagnosis by eyes specially when only some leaves are given without knowing which part of plant they are from and how disorders are in progress and spreading. You have taken from me many data which can help diagnosing this disorder.
it is a necrosis not chlorosis. So it is not iron deficiency at all if you ask me and im sure it is not light stress. I don't think it is a macro element deficiency so fortunately it is not going to reduce your yield much.
All together, even with this limited data, i can still guess it is #copper deficiency. If this is the case the 1st thing you have to check and fix is pH.
it is a necrosis not chlorosis. So it is not iron deficiency at all if you ask me and im sure it is not light stress. I don't think it is a macro element deficiency so fortunately it is not going to reduce your yield much.
All together, even with this limited data, i can still guess it is #copper deficiency. If this is the case the 1st thing you have to check and fix is pH.
Dont you understand why people use less than recommended nutes?
There are 4 ranges for nutrients concentration; Insufficient, sufficient, luxury and toxic. In the sufficient range, plant grow optimal with minimum waste of nutrients. In the luxury range plant grow the same as sufficient range but nutrients waste is high. Manufacturers want you to run out of their products as soon as possible so what they recommend you is in luxury range.
There are 4 ranges for nutrients concentration; Insufficient, sufficient, luxury and toxic. In the sufficient range, plant grow optimal with minimum waste of nutrients. In the luxury range plant grow the same as sufficient range but nutrients waste is high. Manufacturers want you to run out of their products as soon as possible so what they recommend you is in luxury range.
Although too much nitrate can reduce P uptake because of common charge effect but this effect is not strong enough to cause P deficiency. Too much calmag can reduce P uptake but it is not because of just nitrates they have. It is because of precipitation of phosphorus containing compound called calcium apatite at higher pH which can be enhanced by pH raise caused by reduction of ammonium:nitrate ratio by calmag formulas. So reduction of P uptake is the fault of Ca and pH not nitrate although nitrate can effect pH.
One more thing to mention is that calcium and phosphorus deficiency appear as irregular shape of necrosis. So this deficiency is neither P nor Ca deficiency.
One more thing to mention is that calcium and phosphorus deficiency appear as irregular shape of necrosis. So this deficiency is neither P nor Ca deficiency.
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Gingerbeard
New member
Less food, less energy, less growth.
If I can add more nutrients than recommended, I am pretty sure the recommended dose is not a maximum dose the company wants me to use to use up my stock quicker.
Go with recommendations and adjust from there. Or be a man and do not worry about directions. Real men do not follow directions. ​
If I can add more nutrients than recommended, I am pretty sure the recommended dose is not a maximum dose the company wants me to use to use up my stock quicker.
Go with recommendations and adjust from there. Or be a man and do not worry about directions. Real men do not follow directions. ​
Gingerbeard
New member
Just as you grow from experience, so do I. Being one of them thar newbies, I like to follow directions until I find the directions inadequate. Manufacturer's directions, their baseline, not an amalgamation of what I read online. That comes later.
This website is Grow Weed Easy. Not Grow Weed after checking the VPD, EC, PPd, Lmk, adjusting the flavin, and doing three verses of the Hokey Pokey Dance.
This website is Grow Weed Easy. Not Grow Weed after checking the VPD, EC, PPd, Lmk, adjusting the flavin, and doing three verses of the Hokey Pokey Dance.
Gingerbeard
New member
False propositions?
Gingerbeard
New member
Heathen!
Gingerbeard
New member
All plants are not created equal, nor do all plants require the same nutrients. Right. I got that.
Non-plant specific fertilizers are tested on a pantheon of plant species and manufacturers give general information on how to use their products.
If a company is making false propositions about their product, they are encouraging people to kill their plants. That pretty much removes their client base and puts an end to the company.
I'll bet a shiny new nickel than in general, plants that eat less will be smaller plants and have deficiency. In general.
Non-plant specific fertilizers are tested on a pantheon of plant species and manufacturers give general information on how to use their products.
If a company is making false propositions about their product, they are encouraging people to kill their plants. That pretty much removes their client base and puts an end to the company.
I'll bet a shiny new nickel than in general, plants that eat less will be smaller plants and have deficiency. In general.