Can I foliar spary my plants with magnesium 4 weeks into flower?

Hi guys, I'm positive I've got a serious magnesium deficiency. Leaves are turning yellow and brown spots are forming. Can I spray my plants with a magnesium solution when the lights are off, even though they are 4 weeks into flower? Thnx

you really need to root feed them that dureing flowering

Just give Her a Bump through Her roots, all of the CalMag supplement's have instruction's for emergency doses. They will always use more Calcium and Magnesium in the last 4 week's and during flush (If you flush).

silvermt84 said:

Hi guys, I'm positive I've got a serious magnesium deficiency. Leaves are turning yellow and brown spots are forming. Can I spray my plants with a magnesium solution when the lights are off, even though they are 4 weeks into flower? Thnx

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Let's see a full view of the plant first before you do a Fire, Ready, Aim. You can do more harm than good by applying something to a plant that it does not need.

Fess up. What bloom foods have you been using?

UB

Hey UB, great seeing you reply. I'm going to take pictures when my lights are off, as well as give you a full list of nutes. Thanks for time folks.

Here is a picture of one of the leaves that I just took off my plant. Additionally, most all of my leaves look this, or they don't have any brown spots on them, they are just completely level

View attachment 2802945Here is a picture of one of the leaves that I just took off my plant. Additionally, most all of my leaves look this, or they don't have any brown spots on them, they are just completely yellow. I'm currently 5 weeks into flower.

Question in post #4.......

You've been using bloom foods, haven't you? I need to know the NPK values to confirm my educated guess.

By the looks of that leaf, that is not a Mg deficiency, especially if all leaves look that. Mg deficiencies show on lower leaves.

UB

If your 4 weeks into flower and have been using over the counter products then...most likely a cal/mag supplement is required. Most of these mixes are lacking when it comes to cannabis when it is aggressively growing...like in the 4th week for example. We are all guessing though, without info and pics of the set up, its a crap shoot! The leaf shot and the fact your into a 4th week, screams magnesium. Good Luck JAS

I'm currently running the entire Fox Farms lineup with exception of their Boomerang and Flower Kiss: http://foxfarmfertilizer.com/images/pdf/SoilENG.pdf I'm also using Calimagic by General Hydroponics for my cal/mag supplement. My water is R/0 water that usually comes out around 6 PPM. I'm also using Soul Synthetics Nitrogen for my N source. I'm using Liquid Karma, Bloombastic by Atami and Sugaree by Cutting Edge Solutions, too. My plants are in a well controlled climate that during sun up runs at 76.8 and at when they are sleeping the temps hang at 64-66. I'm not quite sure how to come up with the NPK values, UB :\. This is my second grow ever. Thanks again for your time and help

I'm using Liquid Karma, Bloombastic by Atami and Sugaree by Cutting Edge Solutions, too.

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That's what I thought.

The NPK values are out there.

UB