Calcium deficiency ?

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Thecannoiseor

New Member
Hey, my plant recently started showing the yellowish marks, and now I see some white greyish marks on it, I’m not sure if it’s calcium deficiency, or if it could be pests?
any help would be very much appreciated :)
- I’m growing in coco four with perlite
- nutrients are General Hydroponics: 2.5 ml micro 2 ml grow 1ml Bloom & 2.5 ml CalMag per gallon of water
-Light is Electric sky 300w
 

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myke

myke

Well-Known Member
If you post all the proper info you’ll get more responses. At the top of the forum is a list of what you should provide.
 
R Burns

R Burns

Well-Known Member
It is calcium def. You also have a mag def starting to show too. See the yellowing beginning to happen between the leaf margins, on those same leaves? Usually at this size its that your SOIL ph is too low. Really need to be at 6.4/6.5 in veg. Also can see if you are using RO or distilled water. Gotta supplement from the start in these cases. Make sure your ph is up and a healthy dose of cal/mag with the next couple waterings.
 
T

Thecannoiseor

New Member
R Burns said:
It is calcium def. You also have a mag def starting to show too. See the yellowing beginning to happen between the leaf margins, on those same leaves? Usually at this size its that your SOIL ph is too low. Really need to be at 6.4/6.5 in veg. Also can see if you are using RO or distilled water. Gotta supplement from the start in these cases. Make sure your ph is up and a healthy dose of cal/mag with the next couple waterings.
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Thank you so much ! Yeah my ph levels have been at 6.1- 6.3 for most of the time. And I’m using filtered water, the nutrients are general hydro flora bloom and grow, and also CalMag; to fix this, do I just up the ph levels of the water and add more CalMag ?
 
R Burns

R Burns

Well-Known Member
Thecannoiseor said:
Thank you so much ! Yeah my ph levels have been at 6.1- 6.3 for most of the time. And I’m using filtered water, the nutrients are general hydro flora bloom and grow, and also CalMag; to fix this, do I just up the ph levels of the water and add more CalMag ?
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If you are in coco, that ph is fine. But explains your problem some. My ph advice is for soil. But diagnosis is the same. Coco robs cal and mag from the medium. Plant can't get it. Did u follow instructions for buffering the coco before use? Did you buy it pre-prepared?
 
R Burns

R Burns

Well-Known Member
beercan said:
How about this one? Soil, 6.5 ph dyna gro nutes, 4 1/2 weeks into flower, maybe zinc deficiency?? Or overwatering?? Not sure
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Jeez man, idk. Got any pics of when it started? Looks like a few things now. It is not Potassium, like someone suggested. K will be on the bottom, not the top. It is def an immobile nutrient/nutrients. They appear at top of the plant. In soil, I want my ph higher than that. So around 6.8. I would start there. Get ur ph up and some things should become clearer. Keep in mind that its an immobile nute. That helps limit the possibilities. If it were me, I would get the ph up and hit it with a couple feedings of a complete micronutrients product.
 
T

Thecannoiseor

New Member
R Burns said:
If you are in coco, that ph is fine. But explains your problem some. My ph advice is for soil. But diagnosis is the same. Coco robs cal and mag from the medium. Plant can't get it. Did u follow instructions for buffering the coco before use? Did you buy it pre-prepared?
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I bought CANNA organic Coco, it said that it was already buffered, do you think using the Canna Coco A or B nutes would help it better ?
- thanks again for the help
 
R Burns

R Burns

Well-Known Member
Thecannoiseor said:
I bought CANNA organic Coco, it said that it was already buffered, do you think using the Canna Coco A or B nutes would help it better ?
- thanks again for the help
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No. I would just start using extra cal/mg. Maybe 50% more at a time. See how that goes. The mag will show improvement better than the cal, btw. I would imagine that some coco is handled better than others. You may have just got a batch that wasn't prepared as well as it could have been.
 
B

beercan

Well-Known Member
R Burns said:
Jeez man, idk. Got any pics of when it started? Looks like a few things now. It is not Potassium, like someone suggested. K will be on the bottom, not the top. It is def an immobile nutrient/nutrients. They appear at top of the plant. In soil, I want my ph higher than that. So around 6.8. I would start there. Get ur ph up and some things should become clearer. Keep in mind that its an immobile nute. That helps limit the possibilities. If it were me, I would get the ph up and hit it with a couple feedings of a complete micronutrients product.
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She looked great up until a couple werks ago, been playing around with different things, cal mag and cutting back on water, also been upping nutes, she is very large, just cant seem to get er to snap out of it???, this thing is a pain in my ass! About to trash it
 
Jypsy Dog

Jypsy Dog

Well-Known Member
beercan said:
She looked great up until a couple werks ago, been playing around with different things, cal mag and cutting back on water, also been upping nutes, she is very large, just cant seem to get er to snap out of it???, this thing is a pain in my ass! About to trash it
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THIS... is why you don't jump a thread.
 
SheeshM

SheeshM

Well-Known Member
Back to the coco question, I used Canna Coco in the bag this last grow and I still rinsed and buffered it manually. Too late for that but you'll be OK. IMO, run your ph between 5.7 and 6.2 and add some more Cal-mag like R Burns said.
 
C

CannaCountry

Well-Known Member
Yes and yes to the suggestions above...pH of 5.8 ideally and looks like you need more Ca and Mg. As also noted by SheeshM, if it was an odd batch of coco and it wasn't washed / buffered correctly, the plants will be ok...it just may take some time. Good luck.
 
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