how to reduce internodal space

Anth88

Member
any tips on how to reduce the gap in between nodes. keeping plants as small bushy as possible. all theory wellcome thanks
 

SouthCross

Well-Known Member
Supposedly. The same temp at night as in the day. If they run 74° with the light one. 74° with the light off. Doing such is a method. Heaters on timers. AC on timers.
 

nachooo

Well-Known Member
use B-Nine hormone.
Product description
B-Nine WSG Plant Growth Regulator works to regulate the height of plants by reducing the internode length of ornamentals.

https://www.amazon.com/B-Nine-Growth-Regulator-Greenhouse-Nursery/dp/B004JVGY1K/ref=sr_1_1?ie=UTF8&qid=1492354356&sr=8-1&keywords=b+nine
Dont use this product or another that contains its active ingredient daminozide....a well know carcinogen...
Please stop promoting this nasty poisons..you can use other techniques...and if you like to use chemicals there are less toxic options...like BAP or others
 

nachooo

Well-Known Member
There are some new products that are not well tested in cannabis like quercetin wich interacts with auxins that are absolutely safe cause are suitable for human consumption and approved for that.
 

GroErr

Well-Known Member
Read this: An excellent summary of the known techniques to reduce stretch...
https://manicbotanix.com/pgr-free-stretch-reduction/
That's a good summary of some techniques I've tried and validated through testing.

For the stretch period one thing it doesn't mention is managing the difference between veg kelvin and flowering kelvin. That is one of the biggest factors from what I've seen in testing. The greater the difference in colour/kelvin, the greater the stretch. In other words most stretch would be if you were vegging with 6500k and flowering with hps (2300k). So managing the stretch can be managed (greater or less) by choosing or forcing specific light colours during the first couple of weeks. An example to reduce stretch might be running a HID lamp with higher blue ratings during the stretch period, then switching it to hps. imo this is why you'll often hear folks flowering with hps, then switching to LED's for flowering seeing a big difference in reduced stretch under LED's. The most common LED kelvin rating is 3500k for flowering, so without changing veg light kelvin rating, flipping to hps in flowering vs. LED's will produce much more stretch, all other factors being equal. Prior to flowering with 3500k COBs I was using 315w CMH with a 3100k bulb and even with only a 400k difference there was a notable difference in stretch between CMH and COBs.

I can also vouch for negative DIF mentioned in the article suppressing stretch. Ran a couple of rounds last summer running negative DIF temps (higher temps during lights out) and saw a big reduction in stretch. I also noticed significant differences in bud output and density using this technique. It's difficult to run this during winter for me, but I'll go back to running negative DIF as the temps warm up, it was well worth the extra effort to maintain a negative DIF environment. If you want the stretch but want to try negative DIF, you can simply run the first couple of weeks in a traditional environment with say a 10-15F difference between lights-on and lights-off (lower temps), then switch the environment to negative DIF.

In veg, not sure why but those blurple multi-band cheap LED's (e.g. Vipar, or MARS) tend to grow very tight nodes in veg across multiple genetics and you don't have to do anything, they just grow that way under those lamps. I've used them for 4+ years and they go into flowering very tight, then I stretch them to open them up in flowering which gives me a great transition with benefits from both techs.
 

Dudemankidson

Active Member
I definitely find that I get less intermodal stretching under my LED. I do find I get more vigorous growth under my significantly higher wattage HID however.
 

Andino

Member
distance of light bulb must be as close as temp allows
Indicas strain is naturally shorter
dont water them overage, specially in the first 3 week of flowering, same with nitrogenous fertilizers
 

Moflow

Well-Known Member
distance of light bulb must be as close as temp allows
Indicas strain is naturally shorter
dont water them overage, specially in the first 3 week of flowering, same with nitrogenous fertilizers
Yea, lights as close as possible definitely keeps plants short n tight.
:cool:
 

MonkeyPickAss

Well-Known Member
I am using an LED 6" above the plants and they are only about 5" with 6 to 7 nodes. This is about 4 1/2 weeks after seeds sprouted.
4.5 [email protected][email protected]#!#[email protected]#[email protected]# i would be furious if my plants looked like that after 4.5 weeks. These are my current plants under some cheap led lights at 4 weeks today. Simple answer to the op's question is LED lights get you tight nodes. There are 6 different strains in the picture.20170509_192515.jpg
 
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