Calcium deficiency ?

[Thecannoiseor]

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

 

[myke]

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]

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.

 

[Jypsy Dog]

Looks like your in Coco... watch your pH.

 

[beercan]

How about this one? Soil, 6.5 ph dyna gro nutes, 4 1/2 weeks into flower, maybe zinc deficiency?? Or overwatering?? Not sure

 

[Merlin1147]

How about this one? Soil, 6.5 ph dyna gro nutes, 4 1/2 weeks into flower, maybe zinc deficiency?? Or overwatering?? Not sure

Better to start a new thread for this. K deficiency maybe S too

 

[Thecannoiseor]

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.

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 ?

 

[Thecannoiseor]

Looks like your in Coco... watch your pH.

Thank you for the help

 

[Thecannoiseor]

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.

Ok will do !

 

[R Burns]

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 ?

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]

How about this one? Soil, 6.5 ph dyna gro nutes, 4 1/2 weeks into flower, maybe zinc deficiency?? Or overwatering?? Not sure

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.

 

[Thecannoiseor]

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?

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]

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

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.

 

[Jypsy Dog]

Give this site a look, enough guessing. Get her back on track.

Cannabis Grow Guide - Coco For Cannabis - Science and Practice

Cannabis grow guide: articles, tutorials, DIY projects & more! Dedicated to the science and practice of growing cannabis in coco perlite and other media.

www.cocoforcannabis.com

 

[beercan]

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.

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]

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

THIS... is why you don't jump a thread.

 

[SheeshM]

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.

 

[CannaCountry]

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.