Slow maturation of Buds under LED

Rahz · Aug 20, 2017

FREEK1 said:
One issue is that I didnt record my flowering dates which I have since started (again this was not a issue under hps so why would i start doing it). I would estimate that they are at 10 weeks at 40% brown pistils...they just wont finish.
When I was growing under hps and they got to that point it would be week 9 and maybe give it another few day.

90 CRI? I'm going to have to figure out what that means honestly.

CRI is color rendering index. When it comes to phosphor based LEDs 90 CRI will indicate the red peak shifting from 600 to 630. I don't know for sure but suspect the reason plants finish faster under them is because they switch into the flowering stage faster.

But like I said, when I was growing I was doing 8 week strains in 8 weeks. Not sure what to tell you.

dabby duck · Aug 20, 2017

I like running around 75 F/25c.....80c as a minimum is a bit of nonsense....maybe something will like that, but IR is over rated and lack of of it is freeing....

I like to think 20% genetics / 80% everything else including grow error.

ganjamystic · Aug 20, 2017

I agree that 80+ is too high. I like to keep the garden mid 70s. Terpenes are highly volatile and anything higher than 78 or so seems to negatively impact terps in my experience... *Lowering* temps if anything will speed up ripening because it simulates winter... I usually lower my temps and rh a bit toward the end of flower

ganjamystic · Aug 20, 2017

you can also shorten your day period down to 8 or even 6 hours

ganjamystic · Aug 20, 2017

if you want to signal them to ripen, mimic nature at the end of the growing season... lower temps, lower rh, shorten day period, water with cooler water... not only do these things signal the plant to finish up, they also bring out flavor, smell, and autumn colors (yellow, orange, red, purple)..

RandomHero8913 · Aug 20, 2017

ganjamystic said:
if you want to signal them to ripen, mimic nature at the end of the growing season... lower temps, lower rh, shorten day period, water with cooler water... not only do these things signal the plant to finish up, they also bring out flavor, smell, and autumn colors (yellow, orange, red, purple)..

Do you think it matters whether the plant is indica or sativa? And would genetics come in to play? I wondering about strains that have a history of being grown near the equator and if/how flowering would differ being exposed to colder temps than it's used to. Just asking your opinion on this? Thanks!

CobKits · Aug 20, 2017

in my experience i can run strains like sour and glue which can make "donkey dicks" at higher temps under led and still get decent compact buds with less "running"

CobKits · Aug 20, 2017

RandomHero8913 said:
Do you think it matters whether the plant is indica or sativa? And would genetics come in to play? I

110% on both

genetics #1 factor in all grows
envionment and vigor #2 in all grows

Photon Flinger · Aug 21, 2017

ganjamystic said:
you can also shorten your day period down to 8 or even 6 hours

This. You might actually be giving them enough DLI where they won't stop flowering. Give them more lights off.

FREEK1 · Aug 21, 2017

Photon Flinger said:
This. You might actually be giving them enough DLI where they won't stop flowering. Give them more lights off.

Explain DLI, I understand why you guys abreviate, but I am a forum newbie. Haven't had to ask for much help ...

FREEK1 · Aug 21, 2017

ganjamystic said:
I agree that 80+ is too high. I like to keep the garden mid 70s. Terpenes are highly volatile and anything higher than 78 or so seems to negatively impact terps in my experience... *Lowering* temps if anything will speed up ripening because it simulates winter... I usually lower my temps and rh a bit toward the end of flower

Well my leaf temps are 68 last reading , turned the fan down and ordered a fan to push some of the light heat down to the canopy.

RandomHero8913 · Aug 21, 2017

FREEK1 said:
Explain DLI, I understand why you guys abreviate, but I am a forum newbie. Haven't had to ask for much help ...

DLI is Daily Light Integral. Here's the definition from Wiki: Daily light integral (DLI) describes the number of photosynthetically active photons (individual particles of light in the 400-700 nm range) that are delivered to a specific area over a 24-hour period.

Abiqua · Aug 21, 2017

CobKits said:
in my experience i can run strains like sour and glue which can make "donkey dicks" at higher temps under led and still get decent compact buds with less "running"

both are very tropically sativa....not surprising....thats why there are baselines and not exacts.

Photon Flinger · Aug 21, 2017

RandomHero8913 said:
DLI is Daily Light Integral. Here's the definition from Wiki: Daily light integral (DLI) describes the number of photosynthetically active photons (individual particles of light in the 400-700 nm range) that are delivered to a specific area over a 24-hour period.

1 DLI is 278 PPFD for one hour. 550 PPFD for 12 hours would give you about 24 DLI. 15-45 DLI seems to be the sweet spot.

CobKits · Aug 21, 2017

Abiqua said:
both are very tropically sativa....not surprising....thats why there are baselines and not exacts.

im just saying in regard to temperature effects. that was the main reason i switched to (not so great) LED years ago - quality was superior imo, better density, better look overall

SoOLED · Aug 21, 2017

this would be a lot better with pictures...

Photon Flinger · Aug 21, 2017

SoOLED said:
this would be a lot better with pictures...

Yeah but I can see it being the tops with full white pistils that look to be a few days old and below that a lot of red.

It wasn't till the hours were dropped to 6 did the tops start up finishing. That's with a range of 1500-1850 at the canopy and 600-1000 for the lower part of the plant.

Budies 101 · Aug 21, 2017

Feels like there is a massive amount of missing information.

Temps
Wattage
Bugs
PPM's
PH
Light height
Humidity
Strain
Medium
Light cycle (hours)

All should be simple to answer and a pic or two could really help.

FREEK1 · Aug 27, 2017

CobKits said:
im just saying in regard to temperature effects. that was the main reason i switched to (not so great) LED years ago - quality was superior imo, better density, better look overall

Thanks for the tip on temps...raised them to 75-78 from ....67 lol.
Everything is moving along now!

CobKits · Aug 27, 2017

yeah i like 80s, some people like 70s. 60s are bad news growth is slow and deficiencies seem to creep in from lack of transpiration/uptake

Slow maturation of Buds under LED

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