Nitrogen in Flower. How much is too much?

[Cronk]

The only sign of nutrient burn Ive had is tip burn so far. and i mean just the tip, to slightest point in some leaves. The plants don't seem shocked or bothered by it at all so Im not worried

By bloom nutes are GH MaxiBloom that is 5-15-15. At 5% Nitrogen this seems quite high by things I have read but probably not understood about nitrogen in bloom.

because of this I have been laying off the Cal Mag which is 4-0-0 4% Nitrogen

Many of my leaf stems are red and I'd like to correct that and i;d also like to increase my nutes a bit because i am using about 1/2 of the lowest recommended amount. 1/2 tsp per gallon. I wonder if I'm holding them back with being so conservative with the levels

I realize everything can't be perfect but does anyone understand what a top level nitrogen goal should be? OR is it just so specific to each plant and environment that it doesn't even matter.

I understand that more nutes doesn't mean more plant, I'd just like to understand this better so i can experiment from here

[KingKush]

It sounds like you have the right idea and you are headed in a great direction. The MaxiBloom is fine but it's literally MAXED OUT meaning just use small amounts because it's concentrated.
1/2tsp per plant per watering session is fine. Without seeing pictures, focus on healthy leaves. Stem color is usually strain dependent, some strains are more colorful than others. If you are still stretching or just flipping, you could try Nutes/Nutes/Plain H2O as a watering schedule. Water with 1/2tsp back to back waterings and then give some plain H2O the third watering cycle. It also depends on the size (and strain) of your ladies. Bigger girls eat more lol. And our girls are constantly getting bigger so.... a good strategy most of us employ is to give a liberal amount of nutrients in veg and week 1 of flower. Then start transitioning to Bloom nutrients only by the time the stretch is over and nugs start gaining momentum.

About 3-4 weeks after flipping the lights or right after the stretch is completed is a good time to stop all N if things are green and healthy. Even if I have some fade early I try not to use any product with Nitrogen above .75 or 1.0. ( for example: 0.5/ 2 / 1 is some Buddha Bloom I use for flower). It's truly an art more than a science due to strain selection, time spent in veg & overall size, and many other cultural practices. I'm speaking about soil, what are you growing in?

Every grow is different and so is each plant. It's easy to lose ground by severely under or over feeding but as long as you are giving them some Nutes at least once a week and things are looking good then you are in range.

[Cronk]

Thanks for the reply. I'm 4th week flower and doing great. They are about 3 feet high and full of buds so i really have no problem, I just wanted to get a better idea of N limits.

So, you're saying that I should be thinking about cutting N altogether at this point. Am I supposed to move to KoolBloom (2-45-28 still high according to your thoughts) about now, or another low N bloom feed? That would make some sense and may get me my cal mag back and let me add my other additions

Thanks

[KingKush]

Cut off N from other sources is what I'm saying. Zero Nitrogen from here on out could be a strategy for certain strains, or with powdered nutrients. If I used too many nutes
vegging a new strain for example and I'm in wk 4 of Bloom I just use plain water until I'm done. I'm amazed at what the cannabis plant can do herself.
Continue to use nutrients labeled for bloom. Most especially if you are doing fine up until now.
The plant needs a little nitrogen to stay green right now. At some point she will start to cannabilize her biggest shade leaves and that's a sure sign she's done with N.

[KingKush]

These are examples of a low range of N use. This last grow I "tried hard" with a few of my prized OG Kush and ended up giving them too much N too late in Bloom to try and give them a boost out of this cold weather we had a month ago. They are all veggie in week 9, not anywhere near I want them,
when they could be done in 6-7 weeks easy with LESS inputs.

I have right now a single outlying, bagseed, neglected, shoved-into-the-corner type plant that is root bound, split on the main trunk, faded out yellow and lime green plant that is doing great on the bud production. No worries there. Makes me realize that sometimes "Less is More"

You can learn a lot reading labels and feeding regiments from the various nutrient suppliers and manufacturers. It's all the same ratios, some are larger numbers simply due to the concentration. 2-45-28 is similar to .25-2-1 the only thing different are the use rates rates. There's a similar recipie for veg or bloom that companies stick to. You will see patterns emerging. Labels are very informative. When you are internet browsing these products try to read all the literature that they have to offer. When it comes veg or bloom food most companies are honest. It's the crazy other stuff that I'm unsure about.

[Cronk]

Makes good sense, thanks for that

I'm going to stick with the MaxiBloom for now, add my cal mag and additions and may end it with the lower N bloom before finish

I reckon I ought to sacrifice a plant to do nutrient tests at some point

[Vapo69]

Hello dudes.......just so I am completely clear on what I read.....we should cut nitro totally in bloom?.......I thought a little nitro was needed?......

[KingKush]

Yea sorry for any murky or misleading information.

Just make sure you use BLOOM food for your budding phase and you will do great.

[KingKush]

Hey thanks for clarifying. A little morning wake and baked when I wrote the above. You absolutely need Nitrogen throughout all stages of plant growth. Marijuana plants require Nitrogen all through the flower phase. Yes, use Nitrogen in Bloom.

I would like it to sound : Use your Bloom food according to, or less than the label directions.

Pretty much all cannabis fertilizer made for flowering and bud production has low levels of N to sustain normal plant growth. So therefore some N is needed. The question originally posed was about the limits of N during flowering and about particular Nutrients. I mean to say that in some instances, low-to-zero N after the stretch may work out fine. When played out right, my OG Kush can be ready in 5-6 weeks from flipping the lights. So I would stop using N in week 4 but I wouldn't say to someone whose growing a 9 week strain to do so. Does that make sense? It all depends on strain and situation.

Get some good Bloom nutrients and listen to the label.

In my experience, it's always easier to recover and make a great harvest when I run into N deficiencies late in bloom.

N toxicity is a tough rut to get out of.
Thats my only mindset against the use of too much N.

[Cronk]

here's what I did tonight. Still a little high on N I think but I think it'll be good until week 6 when I'll look to cut some out either by changing cal mags or bloom nutes. Maxi Bloom is at the minimum setting

water ph 7.5 / ppm 130
MaxiBloom 1/2 tsp / gal / ppm 750
CalMag 5 ml / gal ppm 950
Big Bud 7.5 ml / gal / ppm 1100
Bud Factor X 7.5 ml / gal / ppm 1100
Silica 2.5 ml / gal / ppm 1100
BioCozyme 5ml / gal / ppm 1100

final ph 5.7 ppm 1100

ph runoff 5.6 / ppm runoff 2400