P Deficiencies or Toxicity?

[Tranquilidade]

I'm growing in 1-gallon fabric pots, and I can't eliminate deficiencies/toxicities. I water every 3rd day, but my soil seems compact; the lights are 480watts LED with 60% power. I had nitrogen toxicity at the start of flowering, but now I run into different stuff. At first, I saw underfeeding signs, and now I suspect either toxicity or deficiencies of Phosphorus. My soil is BioBizz ALL MIX with 20% worm castings. Two weeks ago I top-dressed with Guanokalong Bat Guano Powder but not too much just a few sprinkles on top. Other nutrients I use Guanokalong® BatBoost Liquid, Cal Mag agent, and CANNA Terra Flores. The temperature at night is 17C/62F, day temp 25C/77F. Now humidity ranges from 50-70, but a month ago it was much higher at 70-90, especially at night. I know there are a lot of fuck ups here, but any help would be great.

 

[Pineboy212]

An underfed plant will have numerous deficiencies because it’s under fed,remember macro deficiency starts at the bottom, micro deficiency starts at the top except magnesium that starts at the bottom as well,imo looks like a nitrogen deficiency and the dark spots r looking like phosphorus and the incoming coloring definitely,your plant is n heavy flowering,thus prolly wouldn’t mind a pk booster as phosphorus is usually bumped up during that initial phase if needed.So give your plants what their asking for nothing else,because lower is better than higher but too low is just as bad as higher,hope this helps

 

[Tranquilidade]

I would like to hear more opinions, please. I'm still not sure if this is toxicity or if my plants are underfed.

 

[St. Phatty]

Sounds like Primo Soil.

The one thing I notice we Canna philes do is, we sometimes over-nute the plants.

It's like feeding someone Filet Mignon - and they starve.

I would add a pH neutral mixer, like sand or gravel or perlite, to dilute the Soil.

If you dilute 50% and performance improves, that is a sign.

Are you measuring the pH of the run-off ?

 

[Creeperpark]

Just up pot into a larger container with fresh soil. One-gallon containers are very small and run out of nutrients fast.

 

[Tranquilidade]

Just up pot into a larger container with fresh soil. One-gallon containers are very small and run out of nutrients fast.

My goal is to master growing in small pots. I know it's difficult, but I want to learn.

 

[jackspratt61]

My goal is to master growing in small pots. I know it's difficult, but I want to learn.

Have you checked the roots. What's the ph? 20% castings can make a muddy mix with poor gas exchange. 5% is plenty castings.

 

[Cerathule]

My soil is BioBizz ALL MIX with 20% worm castings. Two weeks ago I top-dressed with Guanokalong Bat Guano Powder but not too much just a few sprinkles on top. Other nutrients I use Guanokalong® BatBoost Liquid, Cal Mag agent, and CANNA Terra Flores

Could you describe how you mix these and how much?

 

[Tranquilidade]

In this case, it was All mix and roughly 15-20% of worm castings. Guanokalong bat guano powder was added at the start of flowering; I mean, I topdressed a few sprinkles on top of the soil. The rest nutrients were added regularly. One thing I've noticed is that almost all my nutrients had nitrogen. The first symptoms were leaves clawing, so I flushed it but clawing may also be because of too high humidity. The second symptom was one plant started yellowing, but from the bottom, the whole plant started to yellow. And the third and latest stage is that all leaves that were yellowing started to get brown spots, curl, dry out and die eventually.

 

[Creeperpark]

Too much salt exposure at some point during the grow. Every time you water you release salts.. Clawing is a sign that there are more salts in the substrate than in the plant. Water always follows salt and so the water is sucked out of the plant causing the claw. As more salts mixed with water become more nutrients the salt content rise in the soil raising the salt levels. After a while the plant will claw every time because of excess exposure..Back off the amendments.

 

[Lumpy-Gravy]

17 is too cold. Warm them up.