Need help! what is this?

[GreenBeagle]

Late Veg, going to flip in a week or 2. Been fighting this for a while now, cant figure out if its newt burn or a deficiency.

 

[PauliBhoy]

That looks like an acute case of Magnesium deficiency. Get some epsom salts stat!

 

[GNick55]

what you growing in and what you feeding them?

 

[GreenBeagle]

That looks like an acute case of Magnesium deficiency. Get some epsom salts stat!

What brand do you recommend? Can I get it off Amazon? I have never had to add that to my grow before. Thanks - Sara

 

[Ponky]

Amazon.ca

 

[PauliBhoy]

What brand do you recommend? Can I get it off Amazon? I have never had to add that to my grow before. Thanks - Sara

I get it in the 50 pound bag, but for the quantity you need you can probably find it at your local pharmacy.

 

[ComfortablyNumb]

Before you start adding stuff... Answer a few questions.

What's your pH?
ppm's in and out?
What are you growing in?
How often do you water?
How much water do you give?
When do you feed?
What are you feeding?
What light do you have and how far above the plants is it?

 

[GreenBeagle]

I get it in the 50 pound bag, but for the quantity you need you can probably find it at your local pharmacy.

I bought some off Amazon! Comes tomorrow. Hope it helps. I do a full cal Mag every feeding so I don’t know what they are doing this.

 

[GreenBeagle]

Before you start adding stuff... Answer a few questions.

What's your pH? 5.6-6
ppm's in and out? Don’t check this but I have a ppm meter, usually hardly any run off.
What are you growing in? Coco
How often do you water? Every 2 days they are bone dry
How much water do you give? 8 gallons for 35 plants
When do you feed? Night
What are you feeding?

Hyshield 4ml/gal
Heavy roots 1ml/gal
Cal mag 5ml/gal
Vitamax 2ml/gal
The 3 color base from GH 2ml/gal of each color
What light do you have and how far above the plants is it? MH 800 watts @ 27in from canopy

 

[ComfortablyNumb]

I knew it. Try this:

Basic Watering

Marijuana Watering, how media, pot size/shape and environment affect it

Ok lots of posts on how to water plants. So I thought I would put together a thread on how different factors contribute to different results that ppl see. This will be a long read based on my personal knowledge, opinions, research and others work to consolidate information for our members. I'm...

www.thcfarmer.com

Watering COCO

HOW TO WATER COCO FOR BEST RESULTS.

Ok writing this cause i see this issue often and rather have a thread to link than explain this each time. This is not my work but a collection of info from many members here and I have put into practice myself. So first off COCO is NOT soil. For best results we want to keep it saturated...

www.thcfarmer.com

 

[GreenBeagle]

I knew it. Try this:

Basic Watering

Marijuana Watering, how media, pot size/shape and environment affect it

Ok lots of posts on how to water plants. So I thought I would put together a thread on how different factors contribute to different results that ppl see. This will be a long read based on my personal knowledge, opinions, research and others work to consolidate information for our members. I'm...

www.thcfarmer.com

Watering COCO

HOW TO WATER COCO FOR BEST RESULTS.

Ok writing this cause i see this issue often and rather have a thread to link than explain this each time. This is not my work but a collection of info from many members here and I have put into practice myself. So first off COCO is NOT soil. For best results we want to keep it saturated...

www.thcfarmer.com

Ok I read it. Thanks for that. So sounds like I need to water more with more run off. So you don’t agree the leaves are showing a mag deficiency?

 

[ComfortablyNumb]

Ok I read it. Thanks for that. So sounds like I need to water more with more run off. So you don’t agree the leaves are showing a mag deficiency?

They are showing a lot of things. I think the problem is that you're not watering enough and now you need to flush, then start feeding less intense with more water.
It looks like a lockout.