Help!! What is this deficiency?

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Waldogrumpley

Member
What is the dark brown spots on my leaves? Nute burn? Not enough cal mag?

Please help with any suggestions!!

Plant is about 4 weeks old
DWC
5.8-5.9 PH
725 PPM
Have added Cal Mag, fox Farm trio (only grow big, big bloom so far)
18hrs on cycle
Temp is 80.2 day and 78 night
45-60% humidity BDD89C8E-8073-4981-AB8B-29714A24B9D9.jpeg
 

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Possibly a cal-mag deficiency! Looks exactly like what happened to my girls.
By chance you using RO water?!
 
Fonzyyy21 said:
Possibly a cal-mag deficiency! Looks exactly like what happened to my girls.
By chance you using RO water?!
Click to expand...
Will they bounce back if I add more cal mag?

yes, using distilled water, you think I should go with tap water?

This is my first time to do this, so very green!
 
Nah, I'm using RO water as well! But yeah I'd give them a healthy dose of cal-mag probably like 2-5ml!
I like my RO water I just have to add some extra cal-mag then what the feeding chart asks for!
 
Waldogrumpley said:
Will they bounce back if I add more cal mag?

yes, using distilled water, you think I should go with tap water?

This is my first time to do this, so very green!
Click to expand...
But yeah they should definitely make a comeback! It looks like you caught it early!
Just make sure new growth doesn't look like that! That leaf will brown or die don't worry about affected leaves!
 
You can give a plant to much cal-mag and begin to lock out other nutes!
But here I'll give you a reference!
I usually make up a 12 gallon res I add about 45 ml to the 12 gallons. Then when I put my res water in my dwc buckets (around 3 gallons give or take) I add about 5 more ml to each dwc bucket! Since then I have not had any more deficiencies!
 
I add 3 tbsp dry epsom salts to my nute mix. I grow outdoors inground.
5 gallon bucket.
fill to the 3 gallon mark with a good mulch
Add 1lb worm castings
3 tbsp epsom salts,
1 cup vermiculite or perlite
shells from about 3-4 eggs
1/4 cup sugar
A scoop of powdered milk
Mix well, spread by hand covering your grow surface area then cultivate into soil 2-3 inches, water with distilled water.
I alternate fertilizer. One month my mix, the next month(or when chemistry indicates) I fertilize with a fish emulsion. Water when needed.
This works for me.
 
Fonzyyy21 said:
You can give a plant to much cal-mag and begin to lock out other nutes!
But here I'll give you a reference!
I usually make up a 12 gallon res I add about 45 ml to the 12 gallons. Then when I put my res water in my dwc buckets (around 3 gallons give or take) I add about 5 more ml to each dwc bucket! Since then I have not had any more deficiencies!
Click to expand...
Another question for you, where is the sweet spot for the PPM and PH?
 
Waldogrumpley said:
Another question for you, where is the sweet spot for the PPM and PH?
Click to expand...
So, I was having problems with my ph sitting around 6.0 I ph it down to 5.6 thanks to some help from guys on here. And I'll never look back! My ppm likes to sit in between like 900-1300 I felt that 1300+ was burning my plants!
 
Been seeing a bunch of my lower growth having these brown leaves. What causes this?
 

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Gorio123 said:
I add 3 tbsp dry epsom salts to my nute mix. I grow outdoors inground.
5 gallon bucket.
fill to the 3 gallon mark with a good mulch
Add 1lb worm castings
3 tbsp epsom salts,
1 cup vermiculite or perlite
shells from about 3-4 eggs
1/4 cup sugar
A scoop of powdered milk
Mix well, spread by hand covering your grow surface area then cultivate into soil 2-3 inches, water with distilled water.
I alternate fertilizer. One month my mix, the next month(or when chemistry indicates) I fertilize with a fish emulsion. Water when needed.
This works for me.
Click to expand...
 

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