I am using green planet GP3 at 25% strength for the last two weeks following their nute chart in terms of npk. Ph is consistently at 6.0. I am using tap water to top off. Only supplement I added was bushdoctor bembe which is a blend of carbs. I'm looking and some of the impacted leaves aren't in hot spots so I'm wondering if maybe its deficient in magnesium based on some pictures I see online (I dont see much in the GP3)
What are these spots and am I too crowded?
- Thread starter bdigi
- Start date
Reason being.
If you're not letting you reservoir swing, you'll lock out calmag.
IMHO I don't think it's deficiency at all.
This chart should give a good idea, of what it may be.
You need to be having healthy swings, between 5.5; and 6.5
When running a reservoir. I usually start low on ph. Say 5.6, then let it rise to 6.5, before topping off.
I do the same with ppms. I start low, then start topping off with nutrient, about halfway before needing a reservoir change.
When you're in bloom. If you're below about 6. It is a little low.
If you're not letting you reservoir swing, you'll lock out calmag.
IMHO I don't think it's deficiency at all.
This chart should give a good idea, of what it may be.
You need to be having healthy swings, between 5.5; and 6.5
When running a reservoir. I usually start low on ph. Say 5.6, then let it rise to 6.5, before topping off.
I do the same with ppms. I start low, then start topping off with nutrient, about halfway before needing a reservoir change.
When you're in bloom. If you're below about 6. It is a little low.
I can't find any info about gp3 on Google. I see it is a 3 part.
The npk ratio, on the bottles. What's the ratio, when you add them all together?
What's the calcium, and magnesium %, in the analysis, on the back of the bottles?
OK.
I think I found your nutrients.
Is this them?
If they are-
What week are you in on the chart?
Your total npk, is 7.6.11.
Total magnesium 2%
Total calcium 6%
It should have plenty of everything man. Plenty.
It's actually a lot of calmag in there already.
It's normal to have 3X the calcium to magnesium.
For instance, in my case. I'm in coir. I very rarely use calmag. I don't buffer my coir, with lime, or any shit like that either. I use tap water. But it's well under 200ppm.
My nutrients are a 5.3.9.
Calcium 3.5%
Magnesium 1%
I'm currently in the third week of bloom. 900ppm is pushing it for mine. I never need to add anything either.
Your nutrient has double the calmag to mine. Npk is a lot higher too. 900ppm of your nutrient, is a lot stronger than mine.
6% calcium is a lot. My bottle of 2.0.0 calmag has 1% magnesium, and 3% calcium.
I really do think your giving them too much love dude
I think I found your nutrients.
Is this them?
If they are-
What week are you in on the chart?
Your total npk, is 7.6.11.
Total magnesium 2%
Total calcium 6%
It should have plenty of everything man. Plenty.
It's actually a lot of calmag in there already.
It's normal to have 3X the calcium to magnesium.
For instance, in my case. I'm in coir. I very rarely use calmag. I don't buffer my coir, with lime, or any shit like that either. I use tap water. But it's well under 200ppm.
My nutrients are a 5.3.9.
Calcium 3.5%
Magnesium 1%
I'm currently in the third week of bloom. 900ppm is pushing it for mine. I never need to add anything either.
Your nutrient has double the calmag to mine. Npk is a lot higher too. 900ppm of your nutrient, is a lot stronger than mine.
6% calcium is a lot. My bottle of 2.0.0 calmag has 1% magnesium, and 3% calcium.
I really do think your giving them too much love dude
If you have been feeding 25%. Divide the ppms on the feeding chart by 4. It will give an estimate of yours. Just go by the week you're following on the chart.
Let us all know, if you can please.
According to the analysis, of bushdoctor bembe, npk is 0.1.3.
How much have you been dosing. It could almost be used as a pk booster. It's almost all it is.
Not that you are. But, if you mixed your nutrients, in a standard dose, with a standard dose of bembe. You get an npk of 7.7.14.
Something is way out of balance.
You were supplementing calmag before. Was that while running the GP3 at 25% as well?
Are you still using calmag?
Or just the bush master Bembe?
What did you change, in your reservoir, when you went away?
Let us all know, if you can please.
According to the analysis, of bushdoctor bembe, npk is 0.1.3.
How much have you been dosing. It could almost be used as a pk booster. It's almost all it is.
Not that you are. But, if you mixed your nutrients, in a standard dose, with a standard dose of bembe. You get an npk of 7.7.14.
Something is way out of balance.
You were supplementing calmag before. Was that while running the GP3 at 25% as well?
Are you still using calmag?
Or just the bush master Bembe?
What did you change, in your reservoir, when you went away?
Last edited:
I'm leaning towards potassium toxicity, if you've been supplementing PK.
Besides being quite informative. This article I think explains potassium toxicity quite well. Down the bottom of the page.
http://plantprobs.net/plant/nutrientImbalances/potassium.html
Besides being quite informative. This article I think explains potassium toxicity quite well. Down the bottom of the page.
http://plantprobs.net/plant/nutrientImbalances/potassium.html
Yup, that's it... combined is 7-6-11 and I mixed 28ml grow, 75ml micro, and 113ml bloom to a 40 gal reservoir (25% strength of mid bloom recommendation) should be 325 PPM. I added half a tsp per gallon of the bembe (recommendation is 1-2 tsp). Thanks for the link. I'll read up on it tonight.
No problem.
Honestly it ain't many ppms at all. You could be over 700, quite easily. If you're diluting your nutrient to 325ppm, this far into flower. Then adding extra PK, calmag etc. You're outta balance for sure.
In my opinion potassium is your antagonist, and is locking out calmag. Adding calmag, will just make it worse too.
Phosphorus, would explain the already, very green leaves too. Is there red stem, or leaves?
Even at the petiole.
Are any leaves, thick and leathery?
I'll take a look when the lights come back on. Some of the leaves are purple at the petiole but I'm not sure how widespread. I dont remember the leaves being leathery though... maybe the chem 91 if any.
I haven't supplemented yet other than adding the bembe. I was thinking of adding magnesium though since some of the leaves that are on the outside are yellowing from the outside in. I flushed for 4 days and went with a quarter strength for 7 more days. I changed out again and am going 25% again, but it seems to be getting worse. Could the roots be the problem?
This isn't my first run, but something is way off.
I haven't supplemented yet other than adding the bembe. I was thinking of adding magnesium though since some of the leaves that are on the outside are yellowing from the outside in. I flushed for 4 days and went with a quarter strength for 7 more days. I changed out again and am going 25% again, but it seems to be getting worse. Could the roots be the problem?
This isn't my first run, but something is way off.
No worries.
TBH, I'm inclined to think it's the extra pk, in your Bembe. Combined with not enough of your GP3.
The GP3 honestly looks like a fantastic nutrient, on its own for cannabis.
IMHO. I'm inclined to think, flush out whatever it is. Then give it a good hit of your GP3, only.
Maybe start at 500ppms. Then if they start improving, begin bumping it up.
I guess root disease could be an issue, depending on your medium. What was your medium?
Root disease seems unlikely to me though. The leaves are pretty crispy. There's not a lot of droopy ness either.
IMHO. You need to flush, and hit them with some proper npk. Your GP3 looks more than proper, judging by the analysis on the label.
TBH, I'm inclined to think it's the extra pk, in your Bembe. Combined with not enough of your GP3.
The GP3 honestly looks like a fantastic nutrient, on its own for cannabis.
IMHO. I'm inclined to think, flush out whatever it is. Then give it a good hit of your GP3, only.
Maybe start at 500ppms. Then if they start improving, begin bumping it up.
I guess root disease could be an issue, depending on your medium. What was your medium?
Root disease seems unlikely to me though. The leaves are pretty crispy. There's not a lot of droopy ness either.
IMHO. You need to flush, and hit them with some proper npk. Your GP3 looks more than proper, judging by the analysis on the label.
That medium sounds fuken awesome man!!!
No problem. I want you to finish them strong too.
Good luck bro.
Hear from you soon.
Here are updates pics from running mid strength nutrients... looks like I can go back to normal strength, but I'm open to feedback.
Guessing I should leave p/k boosters alone for the rest of the run to be safe. I don't want to lose any quality for minimal gains or stress them out any more than I have.
Guessing I should leave p/k boosters alone for the rest of the run to be safe. I don't want to lose any quality for minimal gains or stress them out any more than I have.
