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nitrogen or magnesium def?

K

khaleel

i'm on my first grow and everything has been roses to say the least. buds are looking good, but now at about three weeks into bloom some fan leaves began yellowing towards the bottom. i had to transplant at a week or so into bloom due to lack of adequate planning for how quick the roots would take over, so they could have gotten a tap root or something damaged in the process... ?



or it could be nit or mag def? i use sensi1 Grow and Bloom, respectively, and things have been great. however they are powder nutes and don't dissolve well.
also, i feed every day (at PPM of only 600 or so, using grams per liter measurements - no PPM meter), and i grow with soil (60%) / perlite (40%) mix. temps are never above 80 deg, never below 71 deg. (my grow diary is in my sig. for complete info.)

all that being said, my gut tells me they got burned because of the fert residue from not getting mixed up. thanks for all assistance!!







and the tops:


 
yohomz

yohomz

Member
I don't think there are any deficiencies. They look pretty damn good in my opinion. Many strains' lower fan leaves naturally start to yellow as they mature in flowering. Keep doing what you're doing cuz those are some nice plants.

What is the strain?... If you don't mind me asking.
 
G

Guest

Like yohomoz said your plants look great.

It's normal for plants to suck all of the nutrients out of the leaves when flowering.

Don't worry you are doing a great job.
GCG
 
K

khaleel

garlic city, yohomz: whew. i guess i just got nervous since its my first grow. :spank:

the plants with the yellow were Chrystal (white widow rebacked with northern lights, i believe...). there were also some buds of the Super Ice in there. you'll find a few flower pics on my sig thread if you like.

well, thanks for putting my mind at ease on the grow issue, and for the compliments too. its great to hear from veterans that i'm doing well. :respect:

take care
 
G

Guest

Dude mad props to you!!!! I didn't realize that you were doing that with flourescents? Nice job bro!!!!!

Keep up the good work
GCG
 
MynameStitch

MynameStitch

Dr. Doolittle
Mentor
Veteran
Dude there is to a problem herel you have a nitrogen deficiency; wth people yellowing is only normal 2 weeks before harvest!!!


Get some nitrogen into your bloom ferts; they still need nitrogen but only small amounts 1/2 the amount of what they needed in vegging.
 
1

10k

burnt out og'er
Veteran
MynameStitch said:
Dude there is to a problem herel you have a nitrogen deficiency; wth people yellowing is only normal 2 weeks before harvest!!!


Get some nitrogen into your bloom ferts; they still need nitrogen but only small amounts 1/2 the amount of what they needed in vegging.
Click to expand...


Stitch, look closer at the photos. I'd say these are closer to four weeks into flowering and the yellowing here is TOTALLY NORMAL !!!

This is a major point of contention for me working in the infirmary. Way too many new growers posting their healthy flowering plants freaking out about the natural process of cannabis finishing off its life cycle. IE: flowering

WHO the heck ever told you that yellowing is only normal in the last two weeks of flowering is either full-o-crap, or has pleanty of grows under his belt that had suffered rediculous stretching and finished way too damn late.

Your nute def compilation paper really needs to speak of whats totally normal (and to be expected) in flowering instead of making new growers think they have some kind of a problem worth worrying about.
 
K

khaleel

garlic city: thanks brother! muchos gracious por complimente (i don't speak spanish haha)

stitch, 10K: thanks guys. i think i am going to go with 10K and some of the other comments and chalk it up to a quick-finishing indica strain, but stitch thanks for your 2 cents and taking the time to post. i don't a bit think of nitrogen would hurt things, at any rate.
 
Levitikuz

Levitikuz

Member
im with stitch on this one man...if you loose all ur main fan leaves before flowering is finished you are going to loose yeild potential....you should start loosing ur fan leaves about 2 weeks before harvest as stich said...fan leaves are major factories and you NEED them for good flowering...if its not 2 weeks before harvest i would do what Stitch said...
The reason yellowing should start 2 weeks before harvest is because thats when you begin to flush and not feed them anything, then the plant begins to use up its stored nutes in it fan leaves and they begin to turn yellow and die off...and thats how you know ur flushing is working and the plant is getting rid of all the ansty builds ups you dont want in ur smoke!
 
inflorescence

inflorescence

Active member
Veteran
Levitikuz said:
...and thats how you know ur flushing is working and the plant is getting rid of all the ansty builds ups you dont want in ur smoke!
Click to expand...

The only thing the yellowing of lower fan leaves would be indicating would be that indeed N is becoming deficient because it is so mobile in the soil (easily flushed) and so mobile in the plant (thus the translocation to the buds) BUT if the buds are not showing deficiencies in other major or micro nutes besides N then the flush is only really removing the mobile N and all the other immobile nutes are not being flushed and are not being translocated.
 
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10k

burnt out og'er
Veteran
Levitikuz said:
im with stitch on this one man...if you loose all ur main fan leaves before flowering is finished you are going to loose yeild potential....you should start loosing ur fan leaves about 2 weeks before harvest as stich said...fan leaves are major factories and you NEED them for good flowering...if its not 2 weeks before harvest i would do what Stitch said...
The reason yellowing should start 2 weeks before harvest is because thats when you begin to flush and not feed them anything, then the plant begins to use up its stored nutes in it fan leaves and they begin to turn yellow and die off...and thats how you know ur flushing is working and the plant is getting rid of all the ansty builds ups you dont want in ur smoke!
Click to expand...


With all due respect... the bottom most fan leaves are NOT "major factories" and serve no real usefull purpose other than being a nice storage reserve for the plant to reach into for "a tad more" N and other mobile elememnts. As the plants pile on buds and trichs isn't getting much else from its oldest foliage. Especially foliage which is being choked out of the lights by the ever expanding canopy above it. Take that into account and notice that this is a fluorescent light grow and your "major factories" comment is a dog that just don't hunt.

There is NOTHING in these photos that would indicate that these plants are heading towards yellowing "all" it's fan leaves...pulleeazzze.

If anything I would NOT add any N to the bloom nutes, but would crank up the bloom nute strengths (about 50% higher) to nearing the point of "greenhouse tip burn" and then back it off a tad so they dont fry. This will give more than enough N for these plants without jacking them up and stretching them out with an N od like you'd be proned towards by adding more N at this point in time.

btw... nobody should need to begin clearing two weeks before harvest. Five days is pleanty enough flush time ime.
 
inflorescence

inflorescence

Active member
Veteran
10k said:
the bottom most fan leaves are NOT "major factories" and serve no real usefull purpose other than being a nice storage reserve for the plant to reach into for "a tad more" N and other mobile elememnts. As the plants pile on buds and trichs isn't getting much else from its oldest foliage. Especially foliage which is being choked out of the lights by the ever expanding canopy above it.
Click to expand...

10K, you are the man, I am a peon to disagree but ever notice how a lot of cannabis grows like a christmas tree shape?
Could it be that it is allowing those lower sugar factories (not just N reserves) to still recieve light so to provide that neaded sugar that the developing buds crave?
 
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10k

burnt out og'er
Veteran
ps khaleel...
As those big bottom leaves yellow off totally (like in the second photo only a little more dry), clip them away by cutting the petiole about halfway between the stem and the fan leave. Let the remaining portion of the petiole dry up and fall off on its own. This will help prevent infections and will greatly aid the plants getting decent airflow under the canopy. Which in turn is helpfull in avoiding molds later on in flowering.
 
1

10k

burnt out og'er
Veteran
10K, you are the man, I am a peon to disagree but ever notice how a lot of cannabis grows like a christmas tree shape?
Click to expand...

That classic christmas tree shape comes from the plants "reaching" outward from the center to get out of the shade from the foliage above. Indoors though crammed in together sog style, the best buds get produced by the branches that win the fight for the light. The lowers end up being 'suckers" that try their damndest to punch through the canopy to join the party.

Could it be that it is allowing those lower sugar factories (not just N reserves) to still recieve light so to provide that neaded sugar that the developing buds crave?
Click to expand...

Yea I agree with that for sure. Out there under mother natures unlimited HID there is no "canopy" in the way. Still though as the end of life cycle completes out in the sun, the big moma will go to those reserves as it sees fit... begining about a month before budding ends altogether. I believe it was originally "designed" that way. :tup:
 
Levitikuz

Levitikuz

Member
lol ok well have fun suffering yeild and letting ur plants die off way to early.

Those plants look like they are 3 - 4 weeks into flower...those leaves should not be dieing off that early...but if you want to let ur plant die off before it is suppose to then keep doin what ur doin...seeing its ur first grow u will learn to hate the dreaded "early yellowing"
 
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Levitikuz

Levitikuz

Member
There is NOTHING in these photos that would indicate that these plants are heading towards yellowing "all" it's fan leaves...pulleeazzze.
Click to expand...
ok well if he keeps doin what hes doing i guarantee that the yellowing keeps creeping up that plant and all his major fan leaves will be gone in 2 weeks. and i consider major fan leaves the big ones that collect the most light....and i see some major fan leaves that are yellowing off in those pictures...
And BTW...the 1st pic shows major fan leaves yellowing off, those are 2nd from the top, not bottom leaves not recieving light...i think you should look at those pics again and re-evaluate what your seeing...


and ur 5 day flush thing...well im glad it works for you, but my 2 weeks flush time will taste alot better =]
 
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10k

burnt out og'er
Veteran
Levitikuz said:
lol ok well have fun suffering yeild and letting ur plant dies off way to early.
Click to expand...

ok Tell me levi...
What "exactly" will cause this early death and suffering yield you feel will result in kahleels indoor grow if he follows my advice ?

pfeeew...and while you're at it, make sure you let Rob C. Clarke know about your amazing non yellowing off until last two weeks of flowering cannabis research.
 
Levitikuz

Levitikuz

Member
Ok well i can show you some pics of a couple plants i got going now that arent going to start to yellow off until the last 2 weeks =]....here they are

all the "major" fan leaves on her are still green adn will continue to stay green until the last 2 weeks...and then when the plant is ready to harvest all the major fan leaves should be yellow and dead and very close to it...w/o loosing those important light catchers and surgar producers...
 
Levitikuz

Levitikuz

Member
oh ya forgot to tell ya how they begin to turn yellow....i begin to flush the plant the last 2 weeks and then they start to die off from using all the stored up nutes...there is no secret, its just what is suppose to happen...a plant is not suppose to dies off 3-4 weeks after put into flower, when it still had 3-4 weeks left to finish...
 
1

10k

burnt out og'er
Veteran
Levitikuz said:
Ok well i can show you some pics of a couple plants i got going now that arent going to start to yellow off until the last 2 weeks =]....here they are

all the "major" fan leaves on her are still green adn will continue to stay green until the last 2 weeks...and then when the plant is ready to harvest all the major fan leaves should be yellow and dead and very close to it...w/o loosing those important light catchers and surgar producers...
Click to expand...

and

ok well if he keeps doin what hes doing i guarantee that the yellowing keeps creeping up that plant and all his major fan leaves will be gone in 2 weeks. and i consider major fan leaves the big ones that collect the most light....and i see some major fan leaves that are yellowing off in those pictures...
And BTW...the 1st pic shows major fan leaves yellowing off, those are 2nd from the top, not bottom leaves not recieving light...i think you should look at those pics again and re-evaluate what your seeing...


and ur 5 day flush thing...well im glad it works for you, but my 2 weeks flush time will taste alot better
Click to expand...


I'll repeat what I said since you totally blew over it and missed it...
If anything I would NOT add any N to the bloom nutes, but would crank up the bloom nute strengths (about 50% higher) to nearing the point of "greenhouse tip burn" and then back it off a tad so they dont fry. This will give more than enough N for these plants without jacking them up and stretching them out with an N od like you'd be proned towards by adding more N at this point in time.

Add to that advice Leviticus... The plants yellowing will be confined to the lower biggest fan leaves and others which will be blocked off from decent light by the bud sites the plants will continue packing on in this sog style canopy...yellowing off the lowest leaves which ARE NOT major players in this fluoro grow.
 
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