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What causes less stretch in flower

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What causes less stretch in flower

2Bad 30 Replies 8,989 Views
Page 1 of 2 · Replies 1–20 of 31

What causes your plants to NOT stretch in flower

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    31
#7
2Bad said:
Hahaha with all the variables i'm not sure . I was hoping for some anecdotal experience ya know.
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Having changed everything this grow it’s anybody’s guess why you are not seeing the same stretch. Anyone of the items you mentioned or combination of them can effect growth/stretch.
 
#8
Okay so maybe I should've bumped the light intensity after stretch completed? @GNick55 I went from 120watts in veg to 240watts at flip...then 8th day of flower I went to 360 watts.
 
#9
If you went from 18/6 to 12/12 you lost a third of your DLI. You increase intensity after flip to make up for that loss of DLI. Gradually though. You wouldn’t want to ramp up from 400ppfd to 600ppfd in a single day for example.
 
#10
2Bad said:
Okay so maybe I should've bumped the light intensity after stretch completed? @GNick55 I went from 120watts in veg to 240watts at flip...then 8th day of flower I went to 360 watts.
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it’s manly about light spectrum..
generally more blue spectrum is more compact plant, more red spectrum for not so compact..
did you change the light spectrum for flowering?
 
#11
GNick55 said:
it’s manly about light spectrum..
generally more blue spectrum is more compact plant, more red spectrum for not so compact..
did you change the light spectrum for flowering?
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No it doesn't have a spectrum change for flower. The FCE-4800... but I believe once I increased the intensity maybe it increased blue light way more than red.
 
#12
2Bad said:
No it doesn't have a spectrum change for flower. The FCE-4800... but I believe once I increased the intensity maybe it increased blue light way more than red.
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oh, you have LED.. well it must be well balanced than..
some plants do, some don’t do much.. honestly i’ve never had plants the stretched soo much that i was like holy moly..
fill out, yes!
actually i usually plan on the plants growing to a certain size those first few weeks of flowering and generally they don’t get to that height.. which is probably a good thing as i like tall plants..
 
#13
GNick55 said:
oh, you have LED.. well it must be well balanced than..
some plants do, some don’t do much.. honestly i’ve never had plants the stretched soo much that i was like holy moly..
fill out, yes!
actually i usually plan on the plants growing to a certain size those first few weeks of flowering and generally they don’t get to that height.. which is probably a good thing as i like tall plants..
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I'm hoping for a little more height in the next week.. Got to trim some sucker branches off tonight.
 
#14
Since your light and genetics are the same, maybe less Phosphorus this time?

What Really Causes Stretch? - Greenhouse Product News

Does ammoniacal nitrogen cause stretch in plants, or conversely, does the alternative nitrogen source, nitrate, cause compactness? What does your experience indicate? Do you have all of the facts? Because the application of high-nitrate fertilizers oftenresults in compact plants, growers’...
gpnmag.com gpnmag.com
 
#16
If you have more growing points exposed to strong light, as you would with training horizontally, the stretch is less than it is with a vertical plant. It's like the plant's resources are distributed to all the well exposed growing points instead of a few.
 
#17
I have introduced more red (HPS) but much more intensity and had stunted plants. Light intensity will effect how high some plants stretch. Same seeds, not clones, grown under 3000k led were much taller. Anecdotal, but I vote light intensity. Did you get a bigger badder light?
 
#18
Moe.Red said:
Since your light and genetics are the same, maybe less Phosphorus this time?

What Really Causes Stretch? - Greenhouse Product News

Does ammoniacal nitrogen cause stretch in plants, or conversely, does the alternative nitrogen source, nitrate, cause compactness? What does your experience indicate? Do you have all of the facts? Because the application of high-nitrate fertilizers oftenresults in compact plants, growers’...
gpnmag.com gpnmag.com
Click to expand...
I been experimenting with a certain clone- and can say with 100% certainty that the new nutes made it stretch a lot more. The first 3 runs were dynabloom, dynabloom+ Foliage plus, and Foliage plus + dynabloom. Almost no stretch on this short clone. This run is the new formula dynagrow 6-7-5; way more stretch this time. Looking at the label, I noticed they inreased the ratio of ammoniacle N to nitrate N.
 
#19
2Bad said:
I have a question since my plants aren't stretching this much this time around.
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Not stretching as much can b a good thing.are they just too compact? .has your environment changed .day to night temps running closer than previous..growing from seed or clones..sorry bout the Q but if from seed you will get different phenos that will stay squat and others more open..
 
#20
Moe.Red said:
Since your light and genetics are the same, maybe less Phosphorus this time?

What Really Causes Stretch? - Greenhouse Product News

Does ammoniacal nitrogen cause stretch in plants, or conversely, does the alternative nitrogen source, nitrate, cause compactness? What does your experience indicate? Do you have all of the facts? Because the application of high-nitrate fertilizers oftenresults in compact plants, growers’...
gpnmag.com gpnmag.com
Click to expand...
Right on Moe, I skipped the the experiments & jumped to conclusion...

Conclusions​



When all of these results are put together, it is clear thatthe form of nitrogen did not govern plant size. Repeatedly, the differences inplant growth were a consequence of the amount of phosphorus supplied to the plants, not the form of nitrogen. Going back to the original question,”Does ammonium-nitrogen really cause plant stretch,” the answer would have to be no. Differences in plant height among the many fertilizersvarying in ammonium-nitrate proportion are controlled by the phosphate low phosphate levels result in compact plants, high phosphate levels result intall plants.

Fertilizers with high proportions of their nitrogen in the nitrate form typically contain little or no phosphate, resulting in compactplants and leading to the incorrect assumption that nitrate nitrogen causes compactness. Fertilizers with high proportions of nitrogen in the ammonium form(33 percent or more) invariably contain high levels of phosphate. Thesefertilizers yield the more luxuriant growth to which we are accustomed andresult in the belief that ammoniacal nitrogen causes stretch.

Thus, if compact plants are your goal, you should limit the amount of phosphorus applied to the plants; conversely, if full plants are yourgoal, you should apply fertilizers containing the appropriate levels of phosphorus.
 
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