Nitrogen toxicity?

This is my purple Afghan Kush plant. She's been in flower a week and I've noticed a few problems.

She's always been a darker green than the other plants with her but since repotting and putting into flower her new growth has been twisted. The mature leaves never pray to the light but the tips aren't exactly clawed.

She's barely stretched atall yet also. I'm hoping it's strain related but I'm starting to suspect N toxicity. I just want a second opinion before I flush her incase it's over watering or a deficiency and I make it worse ha!

Ps; the pH is in range, using biobizz nutes in biobizz allmix soil. 5 gal air pots and 600w hps

I see 2 issues here...N Toxicity as well as Phosphorous Deficiency. Take look here:

http://www.growweedeasy.com/nitrogen-toxicity-cannabis

http://www.growweedeasy.com/phosphorus-deficiency-cannabis

Mostly the latter I think.

Good Luck and Great Growz!

What EC (or PPM) are you feeding at?

If you're using the nutrients they way the mfg instructs, you shouldnt be having a problem this bad as long as your pH is under control.

Make sure to double check your math (ml per gallon). One simple error can cause a ton of problems. I know it sounds stupid but its true.

Another thing to consider. Liquid nutrients can fall out of solution. This is a huge problem, and one of many reasons why we did a powder line.



Nutrient companies mix their products at a certain temperature. They try to make a lot of these liquids as concentrated as possible. If your nutrients get outside of this optimum range, salts (ie. nutrients) will fall out of solution. This will cause imbalances in your nutrient profiles.


If you hear any solid material when you shake the bottle, you've got a problem.