Nutrient Burn or Deficiency?

My plants are 3 weeks into flowering and since about a week ago many of the lower leaves are starting to turn light green and/or brown then die. I am growing in promix soil and using miracle gro bloom (I know its not the best nutes, no need for speeches, ive heard it all). I think I may have given them to much food, then did it again when I though it was nute deficiency, but they are just getting worse... Am I severely burning my plants or is it really a deficiency?

PhillyFan said:

My plants are 3 weeks into flowering and since about a week ago many of the lower leaves are starting to turn light green and/or brown then die. I am growing in promix soil and using miracle gro bloom (I know its not the best nutes, no need for speeches, ive heard it all). I think I may have given them to much food, then did it again when I though it was nute deficiency, but they are just getting worse... Am I severely burning my plants or is it really a deficiency?

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its normal 3 weeks into flower

That ain't normal. Hell nah bro. That's nute burn. If you said 6 weeks into flowering, I would say its normal. These leaves looks black and brown... Not the normal yellowing during late in flowering color.

Yeah I'm with cass on this one, this shit is not normal

rob333 said:

its normal 3 weeks into flower

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What?

This should not be normal.
Your over feeding in my opinion.

PhillyFan said:

My plants are 3 weeks into flowering and since about a week ago many of the lower leaves are starting to turn light green and/or brown then die. I am growing in promix soil and using miracle gro bloom (I know its not the best nutes, no need for speeches, ive heard it all). I think I may have given them to much food, then did it again when I though it was nute deficiency, but they are just getting worse... Am I severely burning my plants or is it really a deficiency?

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by 3 weeks about half of my lower fan leaves are yellow by about 6 weeks more then half are yellow buds are huge fan leaves almost gone im 5 weeks in got about maybe 15 fan leaves left stonker buds on her tho

rob333 said:

by 3 weeks about half of my lower fan leaves are yellow by about 6 weeks more then half are yellow buds are huge fan leaves almost gone im 5 weeks in got about maybe 15 fan leaves left stonker buds on her tho

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I was really hoping you were joking in that first post

So should I just stick to plain water for a couple waterings? I water every 3 days

PhillyFan said:

So should I just stick to plain water for a couple waterings? I water every 3 days

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Yup, stick to straight water and you'll be fine, just use a little less nutes and work back up to it

how long till i should start adding nutes again?

thats not nute burn. nute burn occurs at the tip of the plant. its phosphorous deficiency. but first pH and ppm?

urgod said:

thats not nute burn. nute burn occurs at the tip of the plant. its phosphorous deficiency. but first pH and ppm?

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no idea and no idea ha so its not nutrient burn? Those are the lower leaves that have fallen off, the leaves of the upper portion of the plant have burnt tips.

this is a nute burn.

this is phosphorous deficiency. plus you are flowering so it makes sense. whats the n-p-k of the shit your using?

15-30-15

I realized the last 2 watering I gave them double the dose per gallon thats recommended

how much r u mixing per gal of water? & do you pH the water?

I was giving them 2 teaspoons of the miracle gro bloom booster per gallon.. I water every 3 days when they are mostly dry. I realized after the last watering it supposed to be 1 teaspoon per gallon and i use tap water that i let sit out for 3 days

they are in 3 gallon pots n are about 4 feet tall if that helps anything

hmm i recommend you switching nutes since miracle gro isnt made for pot. I mean it will work it you are precarious enough but 15-30-15 isnt really the optimum ratio for flowering. not enough K and maybe not enough mag and cal as well. Its got some pH issues with miracle grow. i'd seriously invest in some pH test drops or a pH pen to measure your nutrient run off. Chances are, you locked yourself out of the nutrients. Anyways assuming pH is not the issue with your plants, the label on the miracle grow bloom says to use 1/2 tsp per gallon of water and unless you grow outdoors then you would use 1 tbsp per gallon.

did you use 1/2 before and was this too weak?

urgod said:

use 1/2 tsp per gallon of water

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That's actually per quart. That's written on the inside packaging. For indoor plants and whatnot. Found it the other day when I was poking around and reading stuff on the inside.

@MonkeyGrinder so what do u think the problem is? i cant diagnose without knowing pH or using miracle gro for anything other than house plants lol

Ima have to agree with you on the phos thing. Middle of the leaves crinkling up and browning. Hell I even pulled out the cheatsheet for it to double check lol.
If OP could give us a rundown of everything that would be good. What size pots. How much actual liquid fert he's feeding em and whatnot. Indoor/Outdoor? Autoflowers or photoperiod?
Also OP what are you using to actually measure your food with before you add water to it? If it's the MG double scoop then the small end is a half teaspoon. The big end is a Tablespoon and a half. There's actually a small line on the inside of the big scoop end to measure just 1 tablespoon. The whole giant scoop is for 1.5 gallon watering cans.
So 6 of those itty bitty scoops per 1 gallon of water (level it off with your finger or something don't just dump it in there mounded) is a full dose. I generally only would throw a half dose of it on a plant unless they could actually take more. You're actually giving more than a half dose with 2 teaspoons/gallon.
But there's not a whole lot of potash in there though either like urgod stated.

I've actually only used their bloom booster this year and had good results with it. Ran it on some autos along with their tomato formula. But I alternated back and forward between tomato formula and bloom (to curve the low K a bit) besides the last 2 feedings in flower. The last feeding I hit em with full strength and then just gave em water the last 10 days or so. But it also put em in the danger zone of N. They turned that oh shit dark green color. But those were also small autos. Other than that I've had no deficiencies in any of my girls this year besides waaaayyyy late spring and it was a calmag issue.
If I'm in veg I swap back and forward between the tomato formula and all purpose at half strength. Hell they were actually taking more than that by the end of veg. Some are still in the veg stage. But they're photoperiods and a whole lot bigger than some spindly autos. They can take it.
My schedule goes water,water feed as needed when it's dry. But when I feed though I feed 20% of the pots actual volume. Generally that soaks up well and I get a little runoff when done. The girls are in 5 gallon containers (probably about to shoot for 7 or 10) Hit em each with 1 liter. Have a smoke. Let the liquid soak up in the pots pretty evenly. Hit em again and get runoff.
Take from that part what you will OP.

Switching over to Jack's Classic after this round for veg and bloom. Their bloom booster has that nice 1/3/2 ration on N-P-K.
Been farting around with it on a couple plants and they're healthy as can be and like their well rounded diet. Te original 20 - 20 - 20 formula anyways.