magnesium deficiency?

[slomoking13]

hey guys.. not sure what is going on here.. about 4 out of the 18 plants are getting some yellwing that turns into brown spots.. i was thinking it looks like magnesium deficiency but before i do anything i just want to make sure that's what it is.. any help is appreciated, thanks!

 

[aknight3]

it actually looks like to much nutes to me, it also looks like you ph is off causing the brown spots, the super dark green leaves and claw is from to much nitrogen and they will eventually start to brown and burn

 

[slomoking13]

ill take a look at the ph.. i just read elsewhere that if the ph is too high it can look like a zinc, iron, magnesium deficiency because it locks them out ... i have been using the same nutrients and schedule for a couple of months but maybe ill try backing off and just flushing

 

[lonleysmoka]

ill take a look at the ph.. i just read elsewhere that if the ph is too high it can look like a zinc, iron, magnesium deficiency because it locks them out ... i have been using the same nutrients and schedule for a couple of months but maybe ill try backing off and just flushing

Did you find anything else out about it? What feeding schedule? what nutes? pot size, pH, ppms of nutes going in and ppms of drainage. You must know all your variables to understand what is wrong with your plants.
With the same nute schedule I am wondering why there is a problem....

 

[HobbyBoB]

Hi mate, G'day
wont be able to help you much and hope you just went through a nice harvest.
I do want to share with you what I had going on and shares some resemblence with your pictures, the dimpled leaves....
My babies had this all the way through vegetation, they doing great... but not 100% happy... still figuring out what it has been.

https://www.rollitup.org/attachments/marijuana-plant-problems/708998d1265744933-curling-up-edges-dimpled-leafs-dscn2576.jpg
https://www.rollitup.org/attachments/marijuana-plant-problems/708997d1265744933-curling-up-edges-dimpled-leafs-dscn2597.jpg
https://www.rollitup.org/attachments/marijuana-plant-problems/708996d1265744933-curling-up-edges-dimpled-leafs-dscn2599.jpg


good luck man, and keep on asking and sharing.
Green is for everybody

 

[slomoking13]

View attachment 932079View attachment 932082View attachment 932083View attachment 932084Hi mate, G'day
wont be able to help you much and hope you just went through a nice harvest.
I do want to share with you what I had going on and shares some resemblence with your pictures, the dimpled leaves....
My babies had this all the way through vegetation, they doing great... but not 100% happy... still figuring out what it has been.

https://www.rollitup.org/attachments/marijuana-plant-problems/708998d1265744933-curling-up-edges-dimpled-leafs-dscn2576.jpg
https://www.rollitup.org/attachments/marijuana-plant-problems/708997d1265744933-curling-up-edges-dimpled-leafs-dscn2597.jpg
https://www.rollitup.org/attachments/marijuana-plant-problems/708996d1265744933-curling-up-edges-dimpled-leafs-dscn2599.jpg
View attachment 932079

good luck man, and keep on asking and sharing.
Green is for everybody

Hey dude, thanks for the comments. Harvest went good back in january, got a couple pounds of some nice smoke. My ph was between 7 and 8 and i was overfeeding a bit. I ended up watering with epsom salts and ph'd water for a couple weeks to clean out the soil. In then end, i think i was having a mixture of lockout from high ph and over feeding causing salt build up. They recovered nicely, at the time i didn't have a ph/tds pen. Got one now though and everything is dialed in on my current grow.

Looking at your pictures, it doesn't look like you are having quite the same problems as i had. Your leaves all look fine and healthy minus the curling edges and some dimples. Looks like a little heat stress and beginnning of calcium def. or some slight overfeeding to me.