What's this messing with my colas?

Sirsmokealot91

Sirsmokealot91

Well-Known Member
Can anyone help me figure out what problem/deficiency is messing with my crop. The cola to the right with the yellow leaves and the reddish/brownish spots. It's only really affecting a few of the upper colas. The bottom growth grows in well, all green, and the buds look sicker than the tops! All in all they seem to be progressing more or less. It's been 8 weeks since I hit the switch. I have been feeding tiger bloom and big bloom @ 3 tsp each per gal every other watering. I give 1 gal each. Light is 600w hps. Temps remain around 72-79F. FFOF in 5 gal smart pots. Ph was @ a low of 5.8 about to weeks ago but now I keep the runoff @ about 6.8. Any help would be welcomed
 

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xtsho

xtsho

Well-Known Member
ChaosHunter said:
You should always have a bottle of Calmag on hand. Plant specific.
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Why?
In grow in coco and never use calmag even though it's the first thing most coco growers use. If you use a nutrient that has everything in it to begin with there is no need for any additives.
 
ANC

ANC

Well-Known Member
It doesn't say how much is in there.
If I had to guess, it would be in the 0.5 to 0.8% range like everything else.
Cannabis, unlike most plants, is a Mg whore.
 
Sirsmokealot91

Sirsmokealot91

Well-Known Member
xtsho said:
Vitagrow
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Is that a veg nute or flower or both? This is only my first grow so I haven't had enough time/runs to experiment and check the effects of different nutes. IN MY OPINION the fox farm nutes thru veg and flower seemed to serve me well. Besides some yellowing, and ph problems, compared to other ppls plants "problems" I have seen my look great. I was thinking of DEFINATELY adding some calmag for next run but if there is some nute with enough in it then great
 
Stink Bug

Stink Bug

Well-Known Member
ANC said:
It doesn't say how much is in there.
If I had to guess, it would be in the 0.5 to 0.8% range like everything else.
Cannabis, unlike most plants, is a Mg whore.
Click to expand...
https://www.1000bulbs.com/pdf/gh-gh1622-label.pdf
Sure it does. Its 4% calcium and 1.5% magnesium. Which is pretty close to the 3:1 ratio we are looking for. More than enough of both for the majority of cannabis strains. Or most any other annual as far as that goes.
 
Mass Medicinals

Mass Medicinals

Well-Known Member
Just curious but if the OP starts using the suggested Cal/Mag doses and this discoloration is still present in a couple weeks, would you say still not enough Cal Mag? Or would that be indicative of another issue?
 
Sirsmokealot91

Sirsmokealot91

Well-Known Member
Mass Medicinals said:
Just curious but if the OP starts using the suggested Cal/Mag doses and this discoloration is still present in a couple weeks, would you say still not enough Cal Mag? Or would that be indicative of another issue?
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Excellent question. Especially for a noob lol. It's not ph, my runoff is constantly 6.5-6.8. I don't think it's heat or light stress. The atmosphere around each cola is real comfortable to the hand. If it's not cal/mag def then what else would you guys suggest it to be. Arm me for the next battle lol
 
Mass Medicinals

Mass Medicinals

Well-Known Member
Well we just ask because personally, we are also newish and are harvesting a crop that had been pH balanced for coco coir, light and temps were good, and we did feed with cal/mag at every feeding even during the off nute days.
 
ANC

ANC

Well-Known Member
Stink Bug said:
https://www.1000bulbs.com/pdf/gh-gh1622-label.pdf
Sure it does. Its 4% calcium and 1.5% magnesium. Which is pretty close to the 3:1 ratio we are looking for. More than enough of both for the majority of cannabis strains. Or most any other annual as far as that goes.
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Thanks I will add it to my records.
I am quickly starting to learn that this hobby repeats the exact same shenanigans as the planted aquarium fertilizer trade.
They will sell you a bottle that is 90% water with a few grams of fertilizer salts in for a fortune.
What happens in the aquarium world is there are now individuals selling mixed or pure smalle scale fertilizer salts of high quality at low quantities and price.
I have a bit more work to do but I reckon I could put a mix together rather cheaply that is tailor-made for our coco, water and grow cycle.
Speak fertilizer to someone in the hobby and he is not even going to reply until you at least go out and measure the hardness of your water.
 
ANC

ANC

Well-Known Member
Mass Medicinals said:
Just curious but if the OP starts using the suggested Cal/Mag doses and this discoloration is still present in a couple weeks, would you say still not enough Cal Mag? Or would that be indicative of another issue?
Click to expand...
If coco coir was not properly buffered, it may be up to 4 months until it stops stealing your calcium and magnesium and kicking off Na and K in high quantities.
 
Stink Bug

Stink Bug

Well-Known Member
IMO the easiest way to buffer coco is with the addition of EWC. A heaping cup per gallon of medium. I use Black Magic coco mix from Home Depot. EWC is the only thing I add to it. From the bag it's nothing more than washed coco and perlite. And Floranova Grow is the only nutrient I use. The biggest thing you need to keep in mind is to vigorously shake the bottle each time you use it. My well water is about 320 ppm @ 7.4pH. I never use pH up or down. I let the EWC keep things in check for me.
 
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ANC

ANC

Well-Known Member
Yeah I've seen some nice grows using only that and calmag and maybe epsom salt in place of that in late flower when the buds need to fatten.

 
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