Clawing and tips burning, no clue why (Pics)

[SlappyD]

Hey everyone

Growing in Soil - Fox Farm Happy Frog with a bit of perlite added
Transplanted from 1 gallon pots as of August 31st to 5 gallon pots
Nutes - nothing yet, will start feeding about 2.5 to 3 weeks after transplant since soil has nutes in it
Temps are around 76 degrees on average and humidity has increased a bit lately to around 54%

So not sure whats going on but over the past week my plants have started clawing, changing color slightly, getting skinny leaves and tips are burning. I'm using a 700 watt LED quantum board, it was running at 80% for a while but since the clawing started I brought it down to 70% since i thought it might be burning. The light is 36" away from top of tallest plant and I put my hand over the plants and there's no heat at all.

Here are 2 pics of the plants as of Sept 5th, as you can see they look fine, and I didn't change anything up since then



And here are pics of the plants as of Sept 14th. First is just a pic showing how far away the light is.




Any idea whats going on? I thought maybe Nitrogen burn but I haven't added any nutes at all and I used Happy Frog since the plants started and they've only now started showing these signs. Not sure what the issue could be.

Any help much appreciated!

Cheers

 

[Richard Drysift]

That clawing is N toxicity. You can tell because the leaves are so dark. It’s not major though and the solution is to water as normal. Did you mix up the soil at all before you transplanted or did you pour it straight out of the bag into the pots?
Reason I ask is because I’ve had similar issues with ocean forest in the past and found that bag soil that has been sitting for awhile can settle making “hot spots.” Not a big deal though just dump out the bag into a bin or something next time and mix it up good before use. Also if you don’t have it already get some granular mycorrhizae..like Great White or Mykos xtreme which will help the roots absorb nutrients from the soil more efficiently than without. Sprinkle some in the hole at each transplant and place the root ball directly in contact with it.

 

[SlappyD]

That clawing is N toxicity. You can tell because the leaves are so dark. It’s not major though and the solution is to water as normal. Did you mix up the soil at all before you transplanted or did you pour it straight out of the bag into the pots?
Reason I ask is because I’ve had similar issues with ocean forest in the past and found that bag soil that has been sitting for awhile can settle making “hot spots.” Not a big deal though just dump out the bag into a bin or something next time and mix it up good before use. Also if you don’t have it already get some granular mycorrhizae..like Great White or Mykos xtreme which will help the roots absorb nutrients from the soil more efficiently than without. Sprinkle some in the hole at each transplant and place the root ball directly in contact with it.

Ahh so it is likely a Nitrogen issue. That's good to know. Hopefully with a few more waters it will go away. Ya I just scooped it from the bag right into the pot and mixed a bit of perlite in, so it could have just been a hotter than usual portion of the bag like you said.

 

[Jeffislovinlife]

Yup what Bruce's best friend said as always thank you for your time