Is this magnesium deficiency ??

[Komonsense]

That's alright, I am a bit of a dickhead, maybe you picked up on that lol

Have you used this medium formula before, or is it a new mix?

I have used before but before I was using dolomite/ lime for calcium and magnesium but it raises the ph too much which was causing some minor problem so I didn’t add any this time so the only calcium and magnesium available would be in the earthworm castings and I’m not sure how much of either is actually in castings. I know you def need to add calcium and magnesium to coco so I’m assuming the earthworm castings don’t have enough which is why I’m getting the first signs of it. Tryna catch it before it gets worse.

 

[Robar]

I like your mix I was looking at peat last night thinking about mixing up a batch with peat instead of coco and comparing. Any suggestions for a good mulch for my current coco mix ?

Chopped straw, leaves, or natural wood chips (Not cedar) work well. Even a black trash bag loosely over the top works. Your purposes in small container isn't for the mulch to breakdown over time rather too retain the moisture yet still allowing it to breath. All the natural stuff I mention does that. if you were to use a trash bag and "Tuck it in" you'd cause a situation without oxygen and thats bad and nasty shit happens. I needs to breath no matter what you use.

 

[Robar]

I have used before but before I was using dolomite/ lime for calcium and magnesium but it raises the ph too much which was causing some minor problem so I didn’t add any this time so the only calcium and magnesium available would be in the earthworm castings and I’m not sure how much of either is actually in castings. I know you def need to add calcium and magnesium to coco so I’m assuming the earthworm castings don’t have enough which is why I’m getting the first signs of it. Tryna catch it before it gets worse.

what did you use to add calcium and magnesium to your mix?

 

[Komonsense]

what did you use to add calcium and magnesium to your mix?

I didn’t. earthworm castings apparently have calcium and magnesium in them I thought it would be enough possibly but nothing really states how much calcium and mag are in EWC. I didn’t want to use dolomite lime again because it raised ph to much. I was planning on adding gypsum and Epsom salts today

 

[Komonsense]

Chopped straw, leaves, or natural wood chips (Not cedar) work well. Even a black trash bag loosely over the top works. Your purposes in small container isn't for the mulch to breakdown over time rather too retain the moisture yet still allowing it to breath. All the natural stuff I mention does that. if you were to use a trash bag and "Tuck it in" you'd cause a situation without oxygen and thats bad and nasty shit happens. I needs to breath no matter what you use.

Yes I need this the top always dries out way faster then the rest thanks for the info !

 

[Rurumo]

Don't start chasing deficiencies when you just see a few tiny blemishes on a leaf, lots of times a young plant will grow out of it. If you start adding cal/mag now, I think you'll just create problems. Give it time, then if you see things worsen, you can always reconsider.

 

[Robar]

I use r/o water as well. I always add dolomite lime to my mix but I also adjust ALL my R/O water with cal/mag to 150+ ppm this is a must for me or my plants become mag deficient.

 

[Robar]

Don't start chasing deficiencies when you just see a few tiny blemishes on a leaf, lots of times a young plant will grow out of it. If you start adding cal/mag now, I think you'll just create problems. Give it time, then if you see things worsen, you can always reconsider.

He's not chasing a phantom. He didn't add any enough to his mix to start with and is using straight R/O water.

 

[Kassiopeija]

Both epsom & gypsum contain sulfur so that would maybe go out of bounds. Epsom is also highly water-soluble and not much a soil ingredient but to add to your water.
Dolomite & calcitic lime 1:2 ratio to arrive at a good Ca:Mg ratio

 

[Robar]

I've been using Promix, perlite, coast of maine compost and worm castings plus all the normal npk fert stuff and amendments. I used to do super soil ala the rev but have dialed back a lot as I always found it to nute heavy and a lot of plants don't dig it.

Here are some pics I just took of one of my chucks day 38 from flip. Duke Diamond C-99 x Swami Organic Seeds Chocolate Thai grown in my mix using cal mag r/o water

 

[HydroKid239]

3 leaves those are the leaves in question and they are on the bottom. What else do you want ? Pic of the plant ?

Raise your light. Check out the leaf edges. They shouldn’t look like road spikes.
That alone could solve the issue. Just keep it fed, you’ll be rolling up your own bud in a few months. Don’t overthink things.

 

[blueberrymilkshake]

I've been using Promix, perlite, coast of maine compost and worm castings plus all the normal npk fert stuff and amendments. I used to do super soil ala the rev but have dialed back a lot as I always found it to nute heavy and a lot of plants don't dig it.

Here are some pics I just took of one of my chucks day 38 from flip. Duke Diamond C-99 x Swami Organic Seeds Chocolate Thai grown in my mix using cal mag r/o water

Very sexy leaves

 

[Komonsense]

I've been using Promix, perlite, coast of maine compost and worm castings plus all the normal npk fert stuff and amendments. I used to do super soil ala the rev but have dialed back a lot as I always found it to nute heavy and a lot of plants don't dig it.

Here are some pics I just took of one of my chucks day 38 from flip. Duke Diamond C-99 x Swami Organic Seeds Chocolate Thai grown in my mix using cal mag r/o water

Good looking plants !

 

[Komonsense]

Both epsom & gypsum contain sulfur so that would maybe go out of bounds. Epsom is also highly water-soluble and not much a soil ingredient but to add to your water.
Dolomite & calcitic lime 1:2 ratio to arrive at a good Ca:Mg ratio

I was going to water in Epsom and top dress gypsum but yeah your right I do want to add some sulfur but both would probably be too much. Thank you

 

[Komonsense]

Raise your light. Check out the leaf edges. They shouldn’t look like road spikes.
That alone could solve the issue. Just keep it fed, you’ll be rolling up your own bud in a few months. Don’t overthink things.

Lights are 24 inches from canopy at about 55 % dimmed it’s a viparspectra xs2000 I wouldn’t think that would be too much although I don’t have a par meter

 

[Komonsense]

He's not chasing a phantom. He didn't add any enough to his mix to start with and is using straight R/O water.

He's not chasing a phantom. He didn't add any enough to his mix to start with and is using straight R/O water.

Precisely

 

[Komonsense]

I was going to water in Epsom and top dress gypsum but yeah your right I do want to add some sulfur but both would probably be too much. Thank you

I have some dolomite lime should I just top dress with that ?

 

[Autodoctor]

Think this is an example you can use when I had a mag deff

 

[Robar]

I don't think a reasonable amount would hurt but I don't remember how line it takes for the plants to be able to uptake. As I can see it you have an early indication of a coming problem that looks like mag def. You said you don't have mag added to your mix other than trace amounts coming from castings which your plant seems to have drawn to depletion. Biggest thing beyond that is you are watering with dead water. My r/o comes out of my super cheap r/o filter is 4ppm I assume your is similar so there is nothing balanced or imbalanced it's just not there and your water should be real close to Ph of 7. As long as your plant roots aren't like in the 50's or lower you shouldn't be having much problem in that direction. If I have all the info correct there isn't anything stopping the uptake of magnesium except the lack of magnesium. The easiest way to supply it at this point is to feed every watering with cal/mag at 150-175 ppm with every watering. I'm not a cal/mag fanboy however I do use a calcium/magnesium supplement with every watering until the last 2 weeks of flower. Since I started using it religiously in my R/O water I've suffered no mag problems.

 

[Robar]

Think this is an example you can use when I had a mag deffView attachment 5107271View attachment 5107272

Yep that's what I think he has only in the very earliest stage. I used to suffer it a lot before I understood you had to supplement it if using R/O water especially when using small pots.
* and on second look your tips are burnt. You may have a lockout problem. High nutes can throw of ph which in my experience causes lockout! I don't consider myself the high authority of growing weed but thats what it looks like.