Help!! What is this deficiency?

[Waldogrumpley]

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

 

[Fonzyyy21]

Possibly a cal-mag deficiency! Looks exactly like what happened to my girls.
By chance you using RO water?!

 

[Waldogrumpley]

Possibly a cal-mag deficiency! Looks exactly like what happened to my girls.
By chance you using RO water?!

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!

 

[Fonzyyy21]

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!

 

[Fonzyyy21]

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!

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!

 

[Waldogrumpley]

ok cool man, thank you for the info. Also, just a question but can you give a plant to much cal mag?

 

[Fonzyyy21]

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!

 

[Waldogrumpley]

Perfect, Thanks for the information amigo!

 

[Gorio123]

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.

 

[Waldogrumpley]

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!

Another question for you, where is the sweet spot for the PPM and PH?

 

[Fonzyyy21]

Another question for you, where is the sweet spot for the PPM and PH?

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!

 

[Waldogrumpley]

Hell yeah!! Thanks man, good shit!

 

[Fonzyyy21]

Hell yeah!! Thanks man, good shit!

Anytime my guy!

 

[Waldogrumpley]

Been seeing a bunch of my lower growth having these brown leaves. What causes this?

 

[Gorio123]

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.

 

[Gorio123]

11weeks 4 days since germ start.
big girl is 6’6” tall
Li’l girl is 4’2” tall. Both beginning to flower

 

[Fonzyyy21]

Been seeing a bunch of my lower growth having these brown leaves. What causes this?

Add some cal mag asap!
You're using RO water right?! These babies love extra cal mag in RO water
Always add a little more!