Plant Problem, lost between deficiency or nut burn

Hello this is my second grow
Im in a 2,5x2,5x7 growroom with 450w LED got 4 Northern Lights Autoflower

They are not all in the same stage of flowering
Plant 1 is far in flower
Plant 2,3 both the same, got a good bud formation ( but seems to be really slow/anormal )
Plant 4 in flower but reeeaally slow bud formation

So here is my problem NUTRIIEENTS
I not feed them a lot when they induce flowering, i gave them one nutrients feed and they are now in the 3 weeks of flowering
Thought it was nut Burn cause it started with the edges burnt, but soon realised it might be phosphorus,potassium deficiency.... So I gave them a 1/2 strenght Green Planet Bloom formula 4 days ago, with 6,2-6,5 phed water, my ppm is fucked i think so wont rely on that to give infos on my ppms, but dont seems to change a thing
Need help im new in the grow thang, read a looot of information got some courses online... But just missing some experiences!!
Got some pictures for you
Plant two first pics
Plant 2,3 other pics
Plant 4 the last two pics

Thanks for help, if you need more info tell me

Stop adding stuff to the soil. Water for 3-4 cycles with non adjusted soft water. PPM range up to 50 is fine. Aim for 30% run off each time. If three cups go in, 1 cup should come out the bottom.

See how they respond in about a week and half.

More advice. Something to take stress out growing. On the next grow, don't add any nutrients to one plant. Don't give her anything but water for her entire life.

This will do three things. It'll show how little they need and if they need it. When In the growth stage, how old. Finally, gives a good understanding of how well your soil does by itself.

Feed the other females what you think they need. Right off the bat. Compare to that one female. Somewhere in the middle is a bada$$, low stress, plant.

Perfect, and i was wondering if i give enough water to my 5 gallons bucket, i usually give them 2L, but not much runoff comes at the bottom, probaly a nutrient lock out would cause this ?

And my soil does not containan y nutrient, would be ok to give them not nuts at all ? I will try for shure, but i heard it is with release nutrients soil that you need to forget nutrients feeding
Thanks for the info

JacabAutoBoss said:

Perfect, and i was wondering if i give enough water to my 5 gallons bucket, i usually give them 2L, but not much runoff comes at the bottom, probaly a nutrient lock out would cause this ?

Click to expand...

It's a PH issue. Nutrient lock out comes in second. Before you use PH adjusted water. Keep it simple. Opinion, It's going to take 6-7, successful grows to get a feel for the plants. It might take longer or shorter. It's a degree of green thumb so to say.

I've personally killed at least 40 plants. Probably a hell of lot more then that. Using all sorts of methods.

I had to get plants grown. Reset, back to the basics. You don't know what the plant needs till you see it without it. You have to have a base line on what you're looking at.

Ye i know, but for now i cant do experiences becaus i got a really small growroom, soon I will grow for tests, but for now I wanted to have the most i can with the knowledge i have !
Should I test the ph of my runoff so i can see if its a ph problem ?
Thanks for the infos

JacabAutoBoss said:

Ye i know, but for now i cant do experiences becaus i got a really small growroom, soon I will grow for tests, but for now I wanted to have the most i can with the knowledge i have !
Should I test the ph of my runoff so i can see if its a ph problem ?
Thanks for the infos

Click to expand...

Nope. Have faith in the ph buffing qualities of good old soil. The only reason to test is if there's a problem. You're verifying the first fuck up. It's obvious it's a PH problem by the burn and lock out.

All you gotta do at this point is pour soft water in a jug. Let her recover from the stuff that's been added.

How to put this.....


That's a living creature in that pot. It breathes, drinks. Take yourself. Go in the kitchen and eat about 6 multivitamins. Keep the taste of the puke to yourself. You'll be sick as a dog.

Same thing as the pictures above.

Allright well i will give them only water until haverst without worriyng about a thing! Thanks

And what to do with the plant that is not fatting her buds? I forget it ?

JacabAutoBoss said:

And what to do with the plant that is not fatting her buds? I forget it ?

Click to expand...

There will always be a variable to this. Sometimes you'll get a plant that's retarded from the others. You'll read about genetics here and there. In its base form....it's a healthy strain of plants that tend not to have funky stunted turds of growth.

You're going to come across plants that's just not right. You can baby them. There's nothing wrong with it. Or you can pull it up and plant a full throttle plant.

As the grower, it's on you. This hobby gets pretty deep.


On these, you can't judge. You added a bunch of stuff leading to the burn.

Actually not added bunch of stuff i gave them twice nutients... They needed it and in veg they got them good the nutrients, dont know why in flower they tripped...
Thanks for the infos