HELP! Nutrient Burn + Mg deficiency + Over Watering?

[LowGrower]

Hey guys, started growing my girl along with others, and this was the only to survive so far (all my fault, since this is my first grow).

SETUP:
I'm running a pc grow, with a simple push(85mm) and pull(125mm)air system, with 3 simple grow lights, 28w each (84w), in a 44cmx46cmx22cm.
Got a variation on humidity/temps of [47/31,5°] to [80/25,5°] throughout the day/night (worst and best scenarios).




PROBLEM:
I had this problem start a couple weeks ago, it started as a tip burn, wich i thought it was a cold soil then i watered it with a organic N-P mixture diluted 50-50 in water (coffee grounds with cinnamon and banana peel [had no eggshells ]), and it ended up worstening it. Unfortunately i had never grown a plant that far (4 weeks+), so i suplied it again with the N-P mixture a week later the last one. Then i decided to flush my soil and supply it again but i forgot to mix it after diluting it, wich made a cover over the ground with it.

TREATMENT:
After i suplied it with the N-P mix, i moved it closer to the light (not enough for a burn), and saw A LOT of growth, but got quite scared after the tip burns started spreading in the leaves, so after a week i moved back to its placed, far from the light. Im doing a LST with HST.



PROBLEM:
But since i dont have a PH/EC meter i can only imagine what has happened after all the research i did (quite a lot actually), i would like some help/thoughts what can be happening with my dear plant, my suspicions are the ones in the title: a nutrient burn, since the tips burn wont stop spreading, a possible over watering, since i used to water it every night (now i started watering every 2 days, or when i see the soil start to dry) and the plants are pointing downwards and last but not least a possible magnesium deficiency, since there are a light colourings in some leaves.

[Rwise]

Coffee grounds contain caffeine and it is an herbicide, it will hurt of even kill MJ, it will also fuck up the PH. Now if you wash them really well, let them set out in the rain so all the bad is washed out, then they would be ok.
I used coffee and coffee grounds to PH with (they are acidic), my 90 day autos took 120+ days to finish lite, in that time I stopped using the coffee and grounds. To the compost pile with them!
Before looking at any deficiency, look to PH.
I agree with nute burn and watering issues, and add the the stack PH and Root issues. We all need and must have at least a cheap PH test, whatever type that may be.

[LowGrower]

it will hurt of even kill MJ

Really?! could you point me any research on it?

it will also fuck up the PH

Yes, but thats where the cinnamon comes in as a alkaline, plus the water dillution! Since i always gave it 50ml (50-50 mix and water). But still, i gave it too much

and add the the stack PH and Root issues

Yes, i have ordered a PH and EC meter, i'm using a homemade organic soil with earthworm humus and compost, that my friend made and use in her garden (which is really pretty), so i believe it had all the nutrients it needed, but it was my fault trying to rush it. And also i got another seed showing her colors, using only water!


So what do you think, should i try cleaning the cover that it has formed on top of the soil, and replace the amount with the same soil? I'll flush it again tomorrow, since i watered it yesterday, and that gives me more time for the PH/EC meter to arrive.

Thanks for the help!

[Rwise]

https://www.livescience.com/56603-interesting-facts-about-caffeine.html

https://jerry-coleby-williams.net/2017/12/10/coffee-grounds-as-a-herbicide/

Read on!

[crucialbunny]

Coffee grounds should be composted first. It provides a nitrogen boost but can be harsh if it isn't broken down and buffered first.

[dilvish]

Looks like the soil you are growing in is bark mulch. If it is, that makes the soil too acidic.

I could go on but there are just too many things that appear to be going wrong with your grow.

for cannabis to grow well you need this: Light...full spectrum light is food. Added nutrients are vitamins. Vitamins are useless if you don't have proper food. Cannabis loves food more than most plants.

[PLreef]

I wouldn't dare to try and grow without being able to check/monitor PH. Way to much invested to guess if it's OK or not.

[SoOrbudgal]

Not much invested with this grow. I understand not having enough $$$ but making good soil and proper lighting is a key that unlocks good grows.

[LowGrower]

Yeah, i'm working with what i have, thanks for understanding.

[LowGrower]

Okay, so i wasen't THAT wrong about treating the soil with coffee grounds, but i did it the wrong.
So i should have feed it "solid" coffee grounds, instead of a liquid solution, for the worms. But still, i have most certaintly caused root damage and a hot ground.
https://www.cannaconnection.com/blog/1867-how-coffee-grounds-can-improve-garden#:~:text=Coffee%20grounds%20can%20be%20place d,known%20as%20vermiculture%20or%20vermicomposting


To clear out the soil mix: its bark mulch, worm castings (since there are at least 2 "swimming" by) and compost (horse manure).
And i believe that mulch has probably saved that girl:

https://www.royalqueenseeds.com/blog-what-is-mulch-and-how-to-use-it-for-cannabis-cultivation-n905

Since i have ordered both PH and EC meters, and the little one has risen, i'll flush the damaged one, and keep feeding the little one with just water and use it to compare it once my meters arrive.
And i have read what Rwise posted but i couldn't tell if you were being sarcastic or trying to help, but anyways thanks for both links.

About the Grow, yes its awful, its cheap, but its an experiment, i intent to prepare a bigger space, a better light source and soil. But right now, i'm asking for help with what i have, thanks for you time!

[CaptainWiese91]

if you want use that soil you need to add some leca or perlite.

[oldjarhead100]

LowGrower I read all the comments and I didn't think any where not try to help ,you did a good job explaining things and you have pretty good handle on things, you asked for help and you seemed to have gotten all six ways to do it thats right in Cannabis there is six ways to do everything what you have to do is pick what makes the most sense to you and stick with it , You defiantly have a root issue my thought would be your soil was to hot then you added more nutrients, I start my seeds in root riots then into 1 gallon pots (if I was only growing a couple of plants like you I would put them in there forever homes) but then watering would be an issue. My suggestion start over get a good potting soil start small and slowly increase pot size until you get to the size you want for soil I don't use anything under a 7 gallon pot good luck

[SoOrbudgal]

We mean well LowGrower we give advice on our own personnel ways of doing our grows what has worked and we grow good weed 99% of the time. You ask we tell ya, I truly hate BS advise but what we know is... it works. Tips and tricks just take what we say and work it for your soil believe me nothing wrong with trying new ways but expect truthful feedback .

[dilvish]

Yup now we now it's likely a soil issue especially since it's in bark mulch...too acidic and unless that horse doo doo was properly composted it could be causing issues too

[LowGrower]

I'm overwhelmed by everyone's help, really, thank you all!

Unfortunately i'm here to tell you guys that both my girls died, yes it was a soil problem that led to a roots problem and i made it worse by not knowing how to treat it. The newer one flowered in 3 days and got a nutrient burn like in the first day, died in the second. The bigger one, died probably because of the roots problem, the leaves just got "down" and never came back.

But i have learned a lot, i also learned that i didn't knew anything about taking care of flowers, actually lol. But got to experience it!

And yes, i'm gonna try again, but this time i'll wait until my PH and EC meters arrive and i'll buy a proper soil! (wow, seems amazing but thats the basic, right?! )

So i would like you guys opinions and thoughts again to help me out! The soil mix that's available for me right now, go as below:

Perlite + Peat + Sphagnum Peat + Bokashi

It's properties according to them:
EC: 0.9 ~ 1.1
PH: 5.9 ~ 6.2
NPK and Micronutrients balanced and available
Fungi, bacteria and beneficial protozoa

So, is it worth it or should i consider saving a little more a making my own? Cause personaly i really liked it, and its also "approved"/tested by them, for cannabis with great results!

And here's a question: the base soil PH is what i should keep while measuring before watering or can i adjust it with whatever i prefer (which would be 6,5 ~ 6,8)?
Once again, thank you all!

[Rwise]

Bokashi works well for kitchen scraps, but it does not work as well for the high carbon material traditionally found in fall gardens. Composting is better at getting rid of the organic material generated by most gardens.

Un-composted materials invite bugs.
peat moss is acidic PH near 3.3, I use it in my alkaline soil.
Perlite, for me perlite only causes PH problems.