Cal mag causing nitrogen toxicity?

rsx2009

Well-Known Member
Ok so a lot of my plants are getting minor clawing.. I guess the leaves have always been kind of dark. I guess fox farm soil is mega rich in nitrogen because honestly I haven't given them much nitrogen st all. Any ways I'm starting to wonder if the small amount of nitrogen in my bloom + the small amount of nitrogen in cal mag is adding up and causing too much nitrogen. I like usuing RO water because of low PPM but if the cal mag is to much maybe I should switch back to tap water some?
 

greg nr

Well-Known Member
how much cal-mag are you using? It's only 1-0-0........

how often are you watering/feeding?
 

rsx2009

Well-Known Member
But ok so say I am having a nitrogen toxicity. Should I dump the cal mag since it does have a slight amount of nitrogen in it?
 

greg nr

Well-Known Member
Well, without knowing how much and what nuts you are adding, I doubt anyone can tell you.

A good step would be to run some plain water through the pot and measure the ppm of the runoff. If the runoff is hot, you have been overfeeding. Flush the plant well and cut back on all the nuts.
 

Dr. Who

Well-Known Member
Ok so a lot of my plants are getting minor clawing.. I guess the leaves have always been kind of dark. I guess fox farm soil is mega rich in nitrogen because honestly I haven't given them much nitrogen st all. Any ways I'm starting to wonder if the small amount of nitrogen in my bloom + the small amount of nitrogen in cal mag is adding up and causing too much nitrogen. I like usuing RO water because of low PPM but if the cal mag is to much maybe I should switch back to tap water some?

Well, without knowing how much and what nuts you are adding, I doubt anyone can tell you.

A good step would be to run some plain water through the pot and measure the ppm of the runoff. If the runoff is hot, you have been overfeeding. Flush the plant well and cut back on all the nuts.
OH BULL SHIT!

Your not telling shit from run off ppm! What the fuck was the run off of just the soil before you added nutrients? Don't "know" do ya?
So tell me then. Just how do you know whats "hot" or "not"?

Flushing here is NOT the fucking answer!

You have no real Idea of what the problem is! No pics of the plant, no pics of the leaves......No answer about what if anything he's feeding - other then a 2-0-0 Ca/Mg with RO (That he has to use with RO)......

First off. Lets see a pic of the plant and then the affected leaves.
Tell us what nutrient you use and how much at a time.
How often?

I'm not going to stick my head out and tell you anything before I can see the plant and then make an actual and informed diagnosis!

You must run a Ca/Mg with RO!
What one do you use?
I liked G&H CALi MAGic for an RO "buffer". The Ca in it is not so much Ca nitrate as the others. It makes a better "buffer" that way. Lowest N value on the market!

Also. Don't jump off and believe the first answer you get... Look at a cpl and do a little checking on what they say and then pick the best answer as the road to follow!

"Flushing" can cause more problems then what your attempting to cure.

You answer mine and I'll give you a quality answer!
 

Flowki

Well-Known Member
This is the exact reason why I hate cal mag but it does sound odd that a low N bloom feed and calmag alone would do this.

Dr.who will find your problem for sure with more info. I would in the mean time like to risk a limb with a curious suspicion, don't mind being utterly wrong ;p. Perhaps feeding during veg was done too heavily, before the plant used up enough of the soil, CFL light sources don't seem to require as heavy feeding too so possible added to the build up of N if they are/were the main light source at a stage. Forgive me for treating your problem as a mystery game ;[.
 

greg nr

Well-Known Member
OH BULL SHIT!

Your not telling shit from run off ppm! What the fuck was the run off of just the soil before you added nutrients? Don't "know" do ya?
So tell me then. Just how do you know whats "hot" or "not"?

Flushing here is NOT the fucking answer!

You have no real Idea of what the problem is! No pics of the plant, no pics of the leaves......No answer about what if anything he's feeding - other then a 2-0-0 Ca/Mg with RO (That he has to use with RO)......

First off. Lets see a pic of the plant and then the affected leaves.
Tell us what nutrient you use and how much at a time.
How often?

I'm not going to stick my head out and tell you anything before I can see the plant and then make an actual and informed diagnosis!

You must run a Ca/Mg with RO!
What one do you use?
I liked G&H CALi MAGic for an RO "buffer". The Ca in it is not so much Ca nitrate as the others. It makes a better "buffer" that way. Lowest N value on the market!

Also. Don't jump off and believe the first answer you get... Look at a cpl and do a little checking on what they say and then pick the best answer as the road to follow!

"Flushing" can cause more problems then what your attempting to cure.

You answer mine and I'll give you a quality answer!
Sorry for making a lot of assumptions. I'll know better next time. But, he is using fox farm soil, so I kinda do know what the runoff ppm of that should be. Also, he is watering 3-5 times a week. If there is no runoff when he waters, I jumped the gun to assuming a buildup of salts in the soil. The flush I talked about wasn't gallons, it was enough to collect runoff to check. If it comes in at 5000 ppm, its a build up. Quick test.

But apologies for rattling the anti-flush gods. Mea-Culpa. ;)
 

rsx2009

Well-Known Member
This is the exact reason why I hate cal mag but it does sound odd that a low N bloom feed and calmag alone would do this.

Dr.who will find your problem for sure with more info. I would in the mean time like to risk a limb with a curious suspicion, don't mind being utterly wrong ;p. Perhaps feeding during veg was done too heavily, before the plant used up enough of the soil, CFL light sources don't seem to require as heavy feeding too so possible added to the build up of N if they are/were the main light source at a stage. Forgive me for treating your problem as a mystery game ;[.
Thanks I'll get some pictures when the light come back on .. I'll take them out of the light too of course
 

Dr. Who

Well-Known Member
Sorry for making a lot of assumptions. I'll know better next time. But, he is using fox farm soil, so I kinda do know what the runoff ppm of that should be. Also, he is watering 3-5 times a week. If there is no runoff when he waters, I jumped the gun to assuming a buildup of salts in the soil. The flush I talked about wasn't gallons, it was enough to collect runoff to check. If it comes in at 5000 ppm, its a build up. Quick test.

But apologies for rattling the anti-flush gods. Mea-Culpa. ;)
No problem and I may have come off a bit strong....sorry.

I first learned from and old guy back in the early 70's....I spent just over 3 years with the guy. He used "reading the plant" to tell him what he needed to do. I left and went home, with a fair base of knowledge and the urge to learn more. This time it was schooling and book learning...
I got to the old guys point and had that book knowledge to work with too. i know and understand meters and such....I just don't have much use for them! I find it far easier to simply let the plant tell me what it's doing and I'll know why....

I always pic up rooted clones before transplant and pull them from the containers and smell the roots. I was doing this with out thinking and was totally absorbed in what I was doing. I didn't see one of my employee's watching me. She came over and ask what I was doing.....I didn't even stop. I simply said I was figuring out what one's are the healthiest, and ready to transplant. "With out looking at the plant? she asked. I then realized what I was doing and lined out what the different assortment of plants meant.

"These need more time. These cpl are having a problem and the rest are ready to go! Pick them up and smell closely the roots and soil from the sides and bottom of the root ball. Try it, and tell me what do you smell?" I said.

"These smell like nice dirt. Like from the woods". (ready to go one's) These smell off, a little bit. Kinda sweet maybe a small ammonia odor but, just a little tiny bit. The roots aren't as quite as thick or heavy. (needed more time before trans)... These two smell sour like, kinda cheese like.." (the bad one's - I had her toss those into the incinerator.)

I helped her through College as she studied Agronomy and Horticulture. She now runs the operations on my organic ground grown produce farms.....She's one of the best growers I know....still always experimenting....

The moral.....There's more then one way to skin a deer (I like cats).....Always keep learning and don't rely on any tool to do the work you can do better!

I better shut up or Sparkle will show up and say I'm an old wind bag.....:cuss:
 

rsx2009

Well-Known Member
OH BULL SHIT!

Your not telling shit from run off ppm! What the fuck was the run off of just the soil before you added nutrients? Don't "know" do ya?
So tell me then. Just how do you know whats "hot" or "not"?

Flushing here is NOT the fucking answer!

You have no real Idea of what the problem is! No pics of the plant, no pics of the leaves......No answer about what if anything he's feeding - other then a 2-0-0 Ca/Mg with RO (That he has to use with RO)......

First off. Lets see a pic of the plant and then the affected leaves.
Tell us what nutrient you use and how much at a time.
How often?

I'm not going to stick my head out and tell you anything before I can see the plant and then make an actual and informed diagnosis!

You must run a Ca/Mg with RO!
What one do you use?
I liked G&H CALi MAGic for an RO "buffer". The Ca in it is not so much Ca nitrate as the others. It makes a better "buffer" that way. Lowest N value on the market!

Also. Don't jump off and believe the first answer you get... Look at a cpl and do a little checking on what they say and then pick the best answer as the road to follow!

"Flushing" can cause more problems then what your attempting to cure.

You answer mine and I'll give you a quality answer!
Ok as per request here is a picture
 

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Dr. Who

Well-Known Member
Ok as per request here is a picture
As I suspected all along!

There are no problems with that plant! It looks to be just about perfectly in the "sweet" spot at that point!
The P level look great (to much=yellowing - very common around here)
N level look to be right in the zone...For the age of the plant...

Any soil sourced N will begin to deplete some, later - Should be about perfect!


NICELY DONE so far!
Keep going as you are!
 
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rsx2009

Well-Known Member
As I suspected all along!

There are no problems with that plant! It looks to be just about perfectly in the "sweet" spot at that point!
The P level look great (to much=yellowing - very common around here)
N level look to be right in the zone...For the age of the plant...

Any soil sourced N will begin to deplete some, later - Should be about perfect!


NICELY DONE so far!
Keep going as you are!
Ok thanks so much for the help
 
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