Does 24hrs light make tight node spacing? Do tight nodes=more yield?

I agree the closer you can maintain an ideal temp or 75 degrees the happier you and your plants will be... Cannabis is sensitive to environmental changes, which produces the old saying. Grow ditch weed in Hawaii and it wants to turn good, grow the best weed in a rough environment, and it wants to turn to shit...
 
One of the reasons you will see medical dispenceries turning down out door pot is because it is "weathered". One of the components of weathering, is "temperature change/variation"... Ideal conditions, produce the best product... You can create conditions indoors, that most of the time can't be recreated outdoors. It's as simple as that, anybody that has done much of both indoor and outdoor growing, can tell you that much.
 

Nizza

Well-Known Member
am i right that more P encourages tighter node spacing whereas less will make more spaced out nodes?
 

Sativied

Well-Known Member
What you may not understand is by maintaining a negative DIF you done compromised plant health, vigor, and production. You have to make a choice. We've had this discussion about DIF before. Freaked one guy out haha. Just call me one blasphemy mofo. :) Post #1584....read it and weep.
Thanks for pointing out that post and link in it. That near constant temp is during the first 7-10 days in a small preveg box, something I've done 5 runs and if I have compromised plant health, vigor, and production by doing so, it's in practice a negligible or at least unnoticable amount (the only thing that limits my production is the 3x4 feet space I have to flower). Like you said, you have to make a choice, sometimes that choice is between lesser evils. I have limited height available so do have to worry about stretch. That's why this time I also work with a lower DIF in my flower setup during transition (to go low-low, the stretched run has been a good learning experience).

If the guy was working with Celsius I can see why he freaked out:
Uncle Ben said:
In general, a 85/70F (32/16C) day/night temp is best for most hybrids for maximum carbo production.
85F = 29C
70F = 21C

That may seem like a small difference for an F user, but 32/16C is 89.6/64.8F, which I assume you agree would be unwise to aim for. 85/70F (29/21C) is "the" range widely used and recommend in Dutch forums. It's what the plants have been acclimatized to, what breeders here use during selection etc, and what I will use again during the flowering period (after sexing) as usual. Might want to (get a mod to) correct the conversion on that one to prevent Celsius folks from freaking out. I for one do point Celsius users to your Pointers thread occasionally and it doesn't make it any easier to convince or at least rethink the rest (like harvesting yellow, speaking of blasphemy).

Just call me one blasphemy mofo. :)
Well, please keep it up man, I got distracted for a while here at RIU by going to TnT and such forums, while I can gain knowledge and still be entertained in AMC :D I select and work with subject matter experts and authoritative sources for a living. Finding the reasons why they 'can' disagree is what gives me an edge. Thanks to you and some others who aren't just parroting received wisdom I can apply the same thing to my hobby.


Oh btw, post #1584 but you linked to a page with a comment about Dutch tulips :roll: :lol: Probably got more posts per page right? Funny coincidence... You are right about those north western breeders though, Oregon specifically, Old Ed, no need to be mean about it. It's not like we all forgot :) I got a dutch grow guide from 1987 that partly comes from the same group. Oldskool outdoor growing. As old as it is, I still occasionally use it to debunk forum-'wisdom'. Oh and you're right about those dutch seeds shops too, I refer to them as tourist/souvenir seeds... some people don't seem to like that much honesty.
 

Uncle Ben

Well-Known Member
That may seem like a small difference for an F user, but 32/16C is 89.6/64.8F, which I assume you agree would be unwise to aim for.
Not at all as long as the 64.8F was when lights were out and at the low of the night. I live in an area where that kind of DIF is the norm most of the spring - fall months. Anything from a 10 to 25F drop in night temp is alright with me.

Regarding the conversion, Celsius X 9/5 + 32= Farenheit conversion. 85/60F = 29/15.6C

UB
 

NietzscheKeen

Well-Known Member
Am I right that you don't bother to read the thread before posting? Go back one page, and find my post on this issue.
Lol, I think Nizza was getting a second opinion on my post, on another thread, regarding high P and plant stretch; I think he misunderstood slightly.

Edit: No wait. I didn't know there was a discussion of High P nutrients on this thread as well.
 

NietzscheKeen

Well-Known Member
Yeah, I seem to get better yields with branchy genetics that often do not have tight node spacing.
When I get a plant with crazy tight compact growth (A few Bubba K and Deep Chunk crosses, others) I don't see very good yields.
I mean, it makes for better looking "denser" colas when the nodes are closer. I think that is the only benefit one will see from tighter node spacing. I've had good luck with long plants as well; longer node spacing.
 

Sativied

Well-Known Member
Note the subtle "aim for". It's not a horrible range but indoors there's no need to simulate the downsides of outdoors just for the sake of.

Regarding the conversion, Celsius X 9/5 + 32= Farenheit conversion. 85/60F = 29/15.6C
Yeah... I don't think we should argue on how to convert C to F, I ask my computer and she's never wrong. Scroll up and see your quote from your Pointers thread, you said 85/70F, not 85/60. Hence the Celsius max and min values you advice there are both wrong and not what you intended. I should have mentioned those SMEs usually don't like it when I edit their errors out either. :) Everybody makes mistakes sometimes :eyesmoke:
 

Uncle Ben

Well-Known Member
Note the subtle "aim for". It's not a horrible range but indoors there's no need to simulate the downsides of outdoors just for the sake of.

Yeah... I don't think we should argue on how to convert C to F, I ask my computer and she's never wrong. Scroll up and see your quote from your Pointers thread, you said 85/70F, not 85/60. Hence the Celsius max and min values you advice there are both wrong and not what you intended. I should have mentioned those SMEs usually don't like it when I edit their errors out either. :) Everybody makes mistakes sometimes :eyesmoke:
We're splitting hairs here. I took the black and white out of the discussion with a previous post when I said - "Anything from a 10 to 25F drop in night temp is alright with me."

IOW, negative DIF's suck. :) The lower the night temp compared to the day means less food reserves lost to respiration processes at night. There's an economy of scale issue here and a bit of botanical reasoning coming into play - you don't want that night time drop to be so radical that tissue production that normally occurs during night is now negatively affected, reduced.

UB
 

NietzscheKeen

Well-Known Member
And that raises a question for me. What is the best way to trim and manicure a pure sativa? The only illustrations and descriptions I see are for Indicas and Indica dom hybrids. I harvested my plants recently and they had some very solid bud formation, but there have been a few in the past that were light and airy over the whole plant. I made hash out of it, but would rather trim it. I just don't think it will make peoples mouths water like the Indicas do; I mean, send a kid in a candy shop and is he gonna pick two handfuls of delicious party sized milky ways or a gigantic plain Hershey bar?

ngbbs4edf09e94736b.jpg
 

Uncle Ben

Well-Known Member
And that raises a question for me. What is the best way to trim and manicure a pure sativa?
View attachment 2744602
Nice eye candy, we likes it!

Best way? Lots of patience, small clippers, and a cold beer or J to keep you occupied. I wear a loupe and if the small leaves have trichomes, they stay and that's usually a lot. Yep, sativas are a pain but I never met a sativa I didn't like. :)
 

Clumpyoyster

Well-Known Member
Although I started out with compact plants (because of preveg CFLs just an inch above plants and 24 hrs light) I had some major stretch last round (under hps), so I've been reading up on ways to keep'm low and well, legallyflying summed it up already, besides keeping the lights close (which includes proper reflector and reflection on walls if any) the key really is the DIF. Makes all the difference. :) Then I realized why they stay compact under the CFLs, not (just/primarily) the constant light, but the near constant temp.

Here's another source from a test setup: http://www.hightimes.com/read/optimize-your-growing-environment

I don't use a heater (or A/C), I just switch day and night. I'm on 72-82 instead of 65-82.

View attachment 2741529View attachment 2741530 View attachment 2741531 (LST-ed, not entirely fair, just showing off :mrgreen:).
ok i need to know where you buy your padded wires for LST. I have been using regular insulated wire for mine which works great but i would like to use those foam padded wires. where can i get them? thanks
 

vostok

Well-Known Member
Note the subtle "aim for". It's not a horrible range but indoors there's no need to simulate the downsides of outdoors just for the sake of.

Yeah... I don't think we should argue on how to convert C to F, I ask my computer and she's never wrong. Scroll up and see your quote from your Pointers thread, you said 85/70F, not 85/60. Hence the Celsius max and min values you advice there are both wrong and not what you intended. I should have mentioned those SMEs usually don't like it when I edit their errors out either. :) Everybody makes mistakes sometimes :eyesmoke:
Greets to the cat long time no see?
 

ZeeeDoc

Well-Known Member
no 24 hour doesn't make tight nodes ... a light source close to the plant will do that...plus a indica strain
I can categorically say that 24/7 produce's shorter plants with tighter nodes, years using this method, it makes the plant more manageable( I do FIM), thicker branches, able to veg for longer which in return gives bigger yields. Having the plant close to the light does prevent stretch however If I grow sativa's it doesn't matter how close I get to the light they still stretch and stretch.
 
Aside from spectrum, strain and temp (bordering on stress but not necessarily stress) if a grower is to influence internodal spacing in flower to say reduce stretch, (if so desired) it lies in the day night temp varient. The closer they are to the same the smaller the internodes. Example, 75f day and 70 - 75f night equals tight internodes. The more the variation the longer the internodes. Other factors such as strain, nutes, etc. will dictate how effective -if at all- manipulating the day night temp varient will be. This is what I personally know to be true and I absolutely DO NOT discount any of the prior suggestions regarding this. I hold the opinions of other experienced growers on this site in high regard. Just my 2 cents. If someone has already clarified this then my bad for not reading more closely. ✌
 

OG Jewish connissor

Well-Known Member
Ok, I'm going to buck the heard and say that 24 hour light source actually DOES decrease node spacing. However, it's not because of the longer light cycle, it is because the day and night (even if there isn't a night, plants do eventually shift to more transpiration ...that is what homebrew we alluded to(this has been studied and proven) temperature Differential is less.

The lower your temperature diff, the better your node spacing is. This is why I bought an external thermostat for my
Mini split. Then the lights go off, 1 hour later the heater comes on.

You want compact plants? Yes, you do. Close lights and low diff. That's all you can really do. Well. There is the morning dip technique but a guy running CFL isn't going to have the gear to do that.
any plant that is not adapted to 24hrs for two weeks will do different producing sites. if you change to less 14 most will sex so use that for a fast veg start if 12/12 until finished did this first time with ohio meigs co gold sativas will need longer flower time if only 2 weeks veg they stretch way more now autos best 20-4 then 18-6 no less tried all different growing with 24 seed to bud and so on ogjc
 

SchmoeJoe

Well-Known Member
Ok, I'm going to buck the heard and say that 24 hour light source actually DOES decrease node spacing. However, it's not because of the longer light cycle, it is because the day and night (even if there isn't a night, plants do eventually shift to more transpiration ...that is what homebrew we alluded to(this has been studied and proven) temperature Differential is less.

The lower your temperature diff, the better your node spacing is. This is why I bought an external thermostat for my
Mini split. Then the lights go off, 1 hour later the heater comes on.

You want compact plants? Yes, you do. Close lights and low diff. That's all you can really do. Well. There is the morning dip technique but a guy running CFL isn't going to have the gear to do that.
T-diff is the biggest thing here for sure. It can also be manipulated to control how fast the plants grow and how big they'll end up.
The point of diminishing returns on the veg cycle is 18/6. Anything past that first 18 hours a day is way less efficient.

Low light levels or a lack of blue, or an excess of red, will lead to longer internodes. Shorter internodes will make a higher yield in a given space with a full canopy because you get more points of growth in the same space.
 
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