nitrogen toxicity?

[Dee_Nugs]

Hi,

I am currently growing 3 bag seeds (fems) organically and am worried I may have nitrogen toxicity or another issue and am wondering if anyone can help make a diagnosis and a subsequent

Soil:
dirt
perlite
peat moss
worm castings
bone meal
dr. earth's organic all purpose fert
tribus (will be adding to soil for first time today)

watering with seaweed powder and molasses

I haven't added any supplemental nitrogen beyond the dr. earths all purpose and the bone meal (both in the soil)

the ladies are about 6 or 7 weeks old.

Also I did some FIM'ing yesterday so a couple of the tops look wonky and fucked up, just a heads up.

Thank you in advance for any advice you may have!

 

[TreeFarmerCharlie]

They look a little dark, but I've had some plants that just had dark leaves and had no issues at all. I think the plants look fine. The only thing I noticed, when I zoomed in on the second picture, is (possibly) a couple of bugs on the big fan leaf at the bottom middle of the picture. It could just be some soil that dropped don the leaf, though, so I would just do a quick check for bugs and don't let my comment freak you out.

 

[Snoopy808]

Are you wondering if the mosaicism in the top is nitrogen toxicity?
Maybe, urea or ammonia can cause that but usually goes away.
The whole plant looks good.
If looking at individual aspects...
The overall growth is dark green. The kelp might be high potassium? Which would contribute to dark green.
No tip burn, leaf curl or swirl. Not likely nitrogen toxicity. But if want to hedge your bet some dolomite lime would never hurt. Would raise pH, high nitrogen in soil is acidifier. To utilize nitrogen calcium is needed and magnesium to transport them, then for chlorophyll.

 

[Dee_Nugs]

They look a little dark, but I've had some plants that just had dark leaves and had no issues at all. I think the plants look fine. The only thing I noticed, when I zoomed in on the second picture, is (possibly) a couple of bugs on the big fan leaf at the bottom middle of the picture. It could just be some soil that dropped don the leaf, though, so I would just do a quick check for bugs and don't let my comment freak you out.

Yeah plus I use seaweed, so that may be darkening them up. And yes I think you are right. I've had some minor spider mite issues but have been treating with neem oil.

Are you wondering if the mosaicism in the top is nitrogen toxicity?
Maybe, urea or ammonia can cause that but usually goes away.
The whole plant looks good.
If looking at individual aspects...
The overall growth is dark green. The kelp might be high potassium? Which would contribute to dark green.
No tip burn, leaf curl or swirl. Not likely nitrogen toxicity. But if want to hedge your bet some dolomite lime would never hurt. Would raise pH, high nitrogen in soil is acidifier. To utilize nitrogen calcium is needed and magnesium to transport them, then for chlorophyll.

Yes the seaweed is 0-0-17 so def high potassium, think I should cut back? I have also foliar fed with it. Side question- do you think I have a magnesium deficiency? I don't use cal-mag and didn't use epsom salt in my soil mix. Thanks so much for your response, feeling much better. Another user mentioned that it looked like nitrogen toxicity but I was skeptical as I haven't fed with any additional nitrogen.

 

[FlowerPower001]

Dark, waxy leaves = too much nitrogen

 

[Snoopy808]

Definitely cut out the seaweed for a while. That will acidify soil too.
So too much potassium can make the soil functionality deficient in calcium and magnesium. Corn farmers have this problem.
Raise pH and cal mag boost with dolomite lime.

 

[Snoopy808]

Dark, waxy leaves = too much nitrogen

Maybe...but i think its the blurple lighting.

 

[Dee_Nugs]

Definitely cut out the seaweed for a while. That will acidify soil too.
So too much potassium can make the soil functionality deficient in calcium and magnesium. Corn farmers have this problem.
Raise pH and cal mag boost with dolomite lime.

so I just PH’d my molasses/seaweed water- it came in at 6.4

also worth mentioning- I use tap water (city water) does this mean I won’t have cal-mag issues, or is that a myth?

also I have attached more images from today with a closeup on one of the darkest leaves.

will the lime both give me cal-mag and raise my ph? I’ll be sure to pick some up.

 

[Snoopy808]

Ok...but its getting more potassium. And molasses isnt needed with every feed.

Yes that is what the lime will do.

.....And tap water is fine, BUT, dechlorinate it over night in an open to air, 5gal bucket. Stir it and just let it sit. The chlorine will out gas easily overnight. And expect pH to change overnight too.
And yes myth that tap water has enough cal-mag in it, if its in the water in not enough for a cannabis plants needs. And or in an unavailable form. More relevant for ppm and hydro/dwc setups.