ไม่สามารถเล่นวิดีโอนี้
ขออภัยในความไม่สะดวก
How Much PAR Do Cannabis Plants Need? - Understanding PPFD & PAR
ฝัง
- เผยแพร่เมื่อ 14 ส.ค. 2024
- Today I go over PPFD and PAR value so that you indoor Cannabis growers can read those LED grow light charts more easily. I’ll explain how much PPFD you need for clones, vegetative or flowering phase.
You can find either a Lux Meter or PAR Meter at my Grow Gear shop: www.amazon.com/...
Want 1-on-1 help from me? Check out the Club: / lexsworld
Odysee: odysee.com/$/i...
Bitchute - www.bitchute.co...
You can tip me directly on paypal here: www.paypal.me/l...
Or send me a fraction of a Bitcoin/Litecoin:
BTC Wallet: 3N8QWyfmobSCKxXUo9MHuLDpmAKyND9QGu
LTC Wallet: MH35vHn2M64J2h6XhQQ3JNt3AHGHBCA5NW
My social media:
My Facebook - / lexsworld
My Twitter - / lexsworld
My Instagram - / lex_blazer
thanks for watching everybody! I published this on YT just cause it's such an important episode. See all the content you've missed the last few weeks on my Off-YT platforms! Linked to in the video description!
Oh boy! Another video about lights. It's almost like this channel has turned into the Light Bulb Show. Give this shit a break man we are getting absolutely sick of it.
There's actually been a bunch of content in the past 3 weeks that isn't light-related...it just isn't being uploaded on to YT anymore. You gotta follow me off-platform. Plus, light content is important - your light fixture and light is your #1 most important piece of equipment. Nothing else impacts yield more. There's also nothing except light your plants can't make it more than 72 hours without.
@@truthfulreviews488 some people just like to act like they are above it all when it reality they are the most weak kneed cowards on this earth
@@truthfulreviews488 I believe I will unsub from this half ass channel. This fool doesnt even show us what the bud looks like after he is done with the grow what kind of shit is that. For the past 10 weeks it's been nothing but lights and scientific bullshit.
@@EthanMcKee. Hi!
While sifting through your shit postings I see you're upset about his content. Thank you for sharing. I have a solution! Stop watching, unsubscribe, and quit posting here! See! Wasn't that easy? Have a nice day, God bless your heart!
Heat stress is easy to spot but light stress is a completely different beast and much trickier to resolve, brighter isn't always better, took me a while to realize the difference.
I literally thought about this a few hours ago and now here's this video explaining everything
Amount of PPFD per stage of growth:
- seedlings: 150-400
- vegetative:. 400-600
- flowering:. 600-900
These values are for Indica strains. Sativa loves the heat, omg; even guzzling down 1400 PPFD.
Are these #s for autos or photos?
I have come to realize that the information on your TH-cam channel is very accurate and dependable. Thanks for the great info!
no it's not ... :D he did mistake Usable PPF for PPFD ... and it has a unit: its micro mols per second.
also using over 1000 umol/s will most likely require CO/2
Thanks for the knowledge. You're helping me handle my night terrors. Every time I go to sleep, I don't know what hell I'm in for. The bud is a precious life-raft in the raging ocean of my mind.
You're literally saving my life making these videos. Thank you.
More specifically, I wouldn't have known of the Cannabis Encyclopedia without your video. There is so much uneducated data out there, I appreciate the forward to that book.
@@AverageJoe8686 I'm the Night Creepy Crawler and I shall share a bowl of Terror with you in your dreams, now and forever.
Thank you for making it simple to understand. Peace ✌️ ☮️
Lex, many years ago a very good friend worked at a medical testing facility as a part of her doctoral program. This was a Federal facility and her specific unit was working with cannabis. This was in the 1970s. She gave us the information that all of their cannabis was being grown in government facilities in Mississippi along the river. She was never more specific than that. She also told us that the cannabis she worked with was among the most potent in the world. I might add that she was never indulged in smoking anything.
I heard about that way back in the early 90's when it was illegal everywhere, could never understand why they would choose the magnolia state, a ounces gets you 10 years, lol
No hat or sunglasses?. I barely recognized you lol. Great video.
Lol foreal
Same! 😆
I like him better without the shades 😎. Great video
He's not in the grow room, gotta have protection :)
Thank you Lex for another fine video, with excellent information. Well done.
You are best I've seen explaining the a PAR and intensity of the numbers well done
Would Like To Say Thank You Alot Of Info Gained Because Of This Video..Well Done Sir..💯😎
I just simply love all your videos and you are the main person I listen to. I want to support you one day
Wished I'd seen this before I bought the lux meter! 🙏 For the upload
Search for converting lux to par
I Lux you very much, darling.
Your videos are so helpful!! i am very glad we have a figure like you we can depend on for cannabis information and tips.. thank you very much your videos are appreciated !!
You always seem to release your videos right went I need them. I happen to be buying a new light and this is exactly what I needed, thanks man great video.
PPFD = [ (uMol/m^2) / sec ] is a better way to write it, which gives the physical intuition of the concept.
uMol is the number of things (Photons)... and m^2 is the square area.
uMol/m^2 is the things in an area.
[Things in area]/second is how many things are in an area if you count for one second. This idea lets you average it all out so you can get one number instead of hundreds which is confusing.
600 PAR @ 18 hours is the exact same amount of light as 900 PAR @ 12 hours.
When you say "400- 600" for Veg and 600 - 900 for flower, it's bad info, misleading.
If someone is switching to flower and running at 600 PAR, if they switch to flower and keep it 600 they're cutting the light by about 30% over all.
If you're switching to flower and running at 500 PAR. Just multiply 500 x 18(hours). Take the total and divide by 12 (hours), that's the same PAR as 500.
I loved the statement about the university 👍
Great... I really needed this.. know what it means... but don't know how much I need
depends on what you're growing some plants lettuce for example I think doesn't need much at all
if you wanna grow some sticky tho these plants need a ton of light (they can use up to 1000 umol/s and with CO/2 and perfect conditions even close to 2000)
Thank you for eloquently consolidating lux/ppfd to 20 seconds.
That but for all information.
Get to it humanity! Haha well done bro.
Nice lex. I liked it. You gave me a better understanding on this subject. Thanks man.
using this to teach a friend who only thinks in terms of lumens! Thanks for the great videos, really big help.
Lumens is to measure light for the human eye wavelength, not for plants you need PAR to get a true reading for the plants not his eyeball.
I’m just finishing my first grow. I ran hps 1000’s vs Electric Sky 300’s. All clones from same mother. Same nutrition. Same pots. Same grow medium. Same room separated by a few feet. Not even close hps lost big time. Es 300’s were at least 25% bigger in every aspect. In a couple weeks we will have yield weights.
Why can't you LED fanboys ever just be honest? Same story, same nonsense, same bullshit math that cannot ad up. A single 300w draw LED isn't capable of yielding more than a 1K HPS. It's closer to about 500w draw to start getting close to 1k HPS and you need about 600w just to start closing in on a 1k DEHPS, so no. You're also describing a grow op setup and not what a first time grower would have. You also go from "I'm/my" to "we", so you are just lying out of your ass about everything as a whole.
Des420 give me an email address and I’ll send you a video. Otherwise, you’re just another guy refusing to believe the Easter bunny isn’t real. Ask yourself why Gavida is spending all its efforts on a new product and abandoning hps?
@@dirigoelectric How about you just post a documented grow on your TH-cam channel for everyone to see? Otherwise you're just a guy talking a bunch of nonsense. Ask yourself why you need to lie to improve your low self esteem?
Des420 th-cam.com/video/9hGjkgOGSIU/w-d-xo.html
Offer a guy proof, and .....crickets chirping
Nicely explained. Greetings from South Africa
Your the boss, I wish I could help, but I’m on disability, from car accident.....thank you..🙏
The university of Mississippi is the only place that grew with federal permits and they supply the few people who got cannabis from a federal program. They have research because they're the only ones who are allowed by the feds. Their info would be great to access.
Just got my first par meeter. And flipped to flower. I had to get the par meeter due to my lights being so nice I burnt the last crop a little
Do you know what I like about this channel…… the set…… that background is as pro as you can ask for I reckon…🙃
Important note: the 600-900ppfd for flowering is meant for photoperiod plants on 12/12 cycle. But if you're doing autoflower plants and flowering them under say 18/6, then you're better sticking with 400-600ppfd. The only reason the ppfd is increased during flowering is to compensate for the shorter time the lights stay on, but that might not be the case when growing autoflower plants. Look up DLI (Daily Light Integral); the ppdf should be based on the number of hours the plants are under the light; the more hours you keep your lights on, the lower the ppdf needs to be. 400-600 is meant for 18 hours on/6 hours off. If you're doing longer or shorter hours then simply add or subtract the percentage increase or decrease in light hours to these ppdf values.
So there isn't much info when i just tried looking this up, are you sure that Autoflowers have the same DLI as photoperiods? I've heard that auto's have higher DLI's so they do want the higher amount of ppfd throughout the light period, but there isn't much in terms of what the dli for cannabis is. I've seen 30 moles for photoperiods and upwards of 40 for autos, but nothing in terms of actual studies.
I think it varies widely depending on strain. I had an auto that got very light stressed at 900ppfd for 16 hours. She's much happier at 500-600ppfd. While another auto from a different strain was totally fine under 1500ppfd for 18 hours. The numbers in Lex's video are general guidelines, but what's optimal for your particular plants might be different. Luckily the plant will usually let you know if it's getting too much light, so you can test, observe and adjust.
Yes, as I kinda imply here again when talking about the Mexican Sativa that was tested - there's always strain-specific truths that you'll only discover once you grow a certain strain a while. My numbers are always just the rough guidelines.
Also I suspect that plants might have different tolerances depending on the light spectrum used (e.g. Blue/Red LEDs vs. Full spectrum white). Room temperature is another factor, since its closely tied to plant metabolic and photosynthetic rates.
I’d like to see a study of the effect of CO2 and ppfd on autoflowers. There isn’t a lot of information on DLI targets for cannabis, even less for autoflowers specifically.
Welcome back!
Not really back; like, today's actual new episode won't air on YT at all...this episode is from a week ago. just didn't want to keep this particular episode off YT - PAR is fairly important stuff.
Wow! Great Info and straight to the point! Very useful information
You are a great Teacher. I wish I could contribute. I am on a fixed budget from a disability. I am a recovering alcoholic with stage 3 cirrhosis. Cannabis has helped me in recovery for I was at a stage 4 just 2 years ago with a bleak outlook. I quit alcohol but realized I was self medicating for anxiety. Well I didn't want to use anti-anxiety medication for they are much more addicting and harmful in my opinion. Plus I am on a plethora of medications to treat the symptoms of Liver Disease and not to mention the most important one costs over $2500 monthly for 2 pills daily for life. It's called Xifaxan 550mg. Ridiculous. Anyways I wanted to thank you for your lessons. I tell and talk about your life lessons in cannabis cultivation. I was using Sunleaves Luma 2.0 ballast and hood but I cannot afford to grow using that. Hopefully I will afford a decent small LED GROW light so I can try my luck indoor once more. Just harvested way small grow for how much power I had to use🤬 very discouraging it was. It was the lights being too much in a small area.
Pt.2.....if you want fast growth instead of those stunted plants yajl grow. Seedlings 140-175 ppfd first 7 days, 200-250 next 5 days and finish seedlings off at 275-300 ppfd (never ever 400). Vegetation 350-400 ppfd first 5 days and so on and so on.
Hey TeW33zy, your comment regarding ppfd is exactly what I've been looking for. Can you provide a plan? So far this is what I've got, please correct any mistakes and help me complete it. Day 1-7: 140-170 ppfd
Day 8-12: 200-250
Day 13-21: 275-300
Day 22-30: 350-400
Day 31-60: 400-600 ppfd
Day 61-90: 700-900 ppfd
I'm using the Photone to get an approximate measurement. I've just written some suggestions without knowing anything.
@@bastianm5478 I am a Sr. Biosystems Engineer, Agricultural. I got you covered.
Ok so ppfd, C02 and Nutrient ppm are a function. See Below
The Nutrient feedings are based on using Fox Farm Soil from the beginning. You shouldn't have to feed Nutrients until mid Flower. Feeding in veg only should occur if your plant eats up all the food in Fox Farm soil. Your plants leaves will tell you if so. This generally happens only if you stayed in a particular pot size to long or past 3 weeks. Generally, Fox Farm Soil has enough reserves until your next Transplant. If u plan to stay in the pot size longer than 2-3 weeks then feed accordingly. Usually 1 Feeding will give you another 2 weeks.
Seedlings:
Day 1-30 = 165ppfd (party cup)
Day 31= Transplant to 1 Gallon
Day 31-45 = 200 ppfd
Day 45 = Transplant to 3 Gallon
Day 45-65= 250-300 ppfd
Day 65 = Transplant to 5 Gallon
Day 65- until Flower 300 ppfd
(Transplant how you best see fit, u do not have to follow my scientific regimen)
Transition to Flower
Day 1-30 = 500 ppfd CO2 700ppm
Day 35 -75 = 700 ppfd CO2 900ppm
⚠️ Warning ⚠️
Do not go over 750 ppfd without CO2 supplementation of 1000ppm or greater or your plants can/will turn to a hermaphrodite.
C02 must always be 200ppm above your ppfd.
C02 supplement table below:
500 ppfd = C02 700 ppm
700 ppfd = C02 900 ppm
900 ppfd = C02 1100 ppm
1000 ppfd = C02 1200ppm
(83°F leaf temp is required for adequate photosynthesis for ppfd above 700)
Tip: Never exceed 1,000 ppfd otherwise you burn the capitate-sessile, capitate-
stalked, and capitate-bulbous trichromes
and volatize your flavornoids, cannabinoids, thc and terpenes. You deplete the aroma by 85% as terpenes are extremely volatile. They evaporate at temperatures above 71°F after harvest and at 87°F or greater during flower from heat occurring from ppfd above 1000-1200. Nutrient ppm should match your ppfd. Feed Nutrients every 4th watering. Ppfd, C02 ppm and Nutrient ppm should match. Except C02 ppm should always be +200 to allow the plant to keep up with carbon dioxide.
There is one thing you not mentioned
Co2 you need 1000umol or more
The university has been growing cannabis for the government since late 1970’s I believe. The federal govt actually provides cannabis from the university to patients on their compassionate care list. Look it up
So many funky lights out.. all slightly different.. gets a bit confusing how good is one over the other. Thanks for the video.. I really need to get a par meter now so i can adjust my lights accordingly.
That is money better spent on environmental control or more lighting. Unless you have money you don't care about, a home grower doesn't need a PAR meter.
Why not
@@shaolindreams Because it's expensive and you don't need it the same way you need to control temperature or humidity.
Great vid. Great info Lex! Cheers bro🤙
Best cannabis channel 👍🔥💨
I'm just getting back into it I used to use HPS. But now I live off the gridand those lights pool way too much juice so I've gone with LED and it looks like I may have made the right choice what used to take 1200 watts to do I can now do 120 watts. But thanks for explaining the different ways of measuring the light I was a little confused when reading the LED specs cuz I had never heard of ppfd. Anyways thanks for the info 😎
University of Mississippi is the only college to have a permit the study by the government
They also grow the only legal research cannabis.
@@LarsLarsen77 that is actually false there us a government funded research facility here in Missouri in Eureka that grows its mainly for the research into cbd but still the fact remains there is another government funded research facility and probably more that we just dont know about through out the country that are ramping up for full legalization like Canada but its big tobacco and pharmaceutical companies that are greasing the plams of politicians
Not why, but WHY!?
Research my ass this university is part of the problem. They have suppressed research thanks to big pharma but they still needed a token "research" location and this is it.
Sadly true, their quality has been reported to be barely above Cannabis Ruderalis by the one federally legal patient that was interviewed. As far as claims to other universities having permissions from the govt, I know that there is current litigation over this because of the blockage, so I find the post about the Missouri university suspect. I do my best to keep abreast of these issues, but welcome new input always.
This helped me, thanks. Of course I subbed.
GREAT VIDEO!!!!!!!THANK YOU LEX!
How about Autoflowers? What PPFD would be ideal for Autoflowers due to lengthier light cycles?
high ppfd needs more carbon dioxide to get max growth
and everything else - nutrition, water, temp mgt, ect.
I follow you on weed tube and you tube. The you tube page to me is set up better but both platforms content is great . Keep up the great work.
Well spoken man thanks I'm a newb and have watched most of your vids and also dislike Google and fb and probably Amazon also and I use brave
I have a 600w viosun led in a 3x3 grow tent. And I just ordered hlg 260 rspec. I was thinking of keeping them both in the tent. Is that a good idea to try and get a better yield since they're both pretty small? Or should I take out the vivosun and just use the hlg
Nice video man, thanks.
That would be a awesome interview with Mississippi state
Excellent. Thank tou
The University of Mississippi has been the ONLY government controlled cannabis research and grow legally in the US since 1961. In 2016 they passed a bill allowing other institutes to study the plant but so far UM is the still the only one.
Right now I've got my seedlings at 800 to 1000 par outdoors showing no signs of stress
Technically you go over 1000ppfd also if you introduce more co2 to the grow, itll increase yield and speed of growth.
We read the same book and watched the same movie. Ambient CO2 is 300-400 ppm. CO2 for extreme lighting - 1200-1500 ppm. You also need more nutrients, water, heat, and air current management. Amen, My Brothers in Ribosomoes.
I assume that Mississippi is doing that research because they have something to do with the government marijuana farm in Mississippi. That farm is the only supplier for research in the US.
lol yes, i looked into this after; it's exactly correct. They're involved in the last remnants of the Federal medical program.
Other then what is seized throughout the country from the major illegal grow ops
University of Mississippi got a federal grant for the study of cannabis, which is why you see so many published articles from the institution.
Amazing video
Excellent Video Bro...Thanks
PUR is most important which is Photo Useable Radiation . Which is based off the chlorphyll use . Atleast thats what we use for coral s
Ere lex, watched both your excellent videos on light, which do you think is better to use as a measure of good growing Lux or Ppf? Grand advice mate and like your style first indoor grow so still working things out, you been a wealth of quality info moosh, cheers
I acquired some seeds and 6 out of 18 sprouted in my germination chamber. now i'm scared that i don't know the genetics or even strain/gender yet so here's hopin... just one hot mama is all i need. I'm wondering, what should i do with my light ratios with an unknown plant? just 12/12 for a given general period then all light? thanks for any responses. i'm very new to this and it's my medicine for a lot of things now!
Great info. Thanks lex.
Lex on point as always thanks bro interesting stuff
Lex, the University of Mississippi is the only institution in the United States which the Federal govt as been allowed to possess and do research on cannabis. That is why you see so many studies citing their findings
Thanks for the useful info!
Take a LUX reading and multiply it by 0.015 and you will get an accurate PPFD number.... try it and see. It's pretty close .. 😎
Gracias!
Bestva is a hell of a light
Hey man i love your info
Whats a lux meter do i need this and the par meter he talked about for my indoor tent in my basemnt??
If you are running 1000 ppfd and up you should be running CO2 for your garden to be healthy and growing efficiently.
For me these numbers(everywhere shows same numbers) about ppfd for each stage dont work.I ve par meter and every time i try catch these numbers my plants stress.Do i do something else worng or its marketing?
My issue is my led lights at 15% dim is already at 550 par am in veg I try putting it to 25% amd it goes to 1000 par it’s a 600 watts do I keep it at 15% meanwhile the manufacturer recommended 100% for veg ? Can u help me out
I have a plant in flower at 850 par no Co2 some spots are at 900 ppfd
Fuck TH-cam man.. took my boy down at Canucks Grow. He was my favorite. Downloading the app now
Mississippi was part of a cannabis study by the US Govt. I think the remaining subjects of that study still receive cannabis from the govt??? The only people in the US the federal govt considers legal to possess.
Is this to assume the seedling and veg are on a 18/6 and flowering is 12/12 which then means, after calculating MOL (using your medium values),... "uMol * 60 * 60 /1m * hours = MOL"
seedling (18hr): 21.06
Veg (18hr): 32.4
Flower (12hr): 32.4
Now, I'm understood above 30 for flower is cost effective and I do beleive the seedling is in a good value, but having the same MOL for veg and bloom is a normal thing?
You can now get a par meter as an app👍
Mississippi. Has/had been a long standing place where Fed. Authorized marijuana grow and research has occurred (mid 20th century).
Also they grew hemp.
so where is the link in the description for "LUX" ? I have no incentive to hunt for it....
Fun fact: The University of Mississippi (aka Ole Miss) has pot fields where they grow their own "test subjects"
I have a 3000 watt full spectrum LED light and I have little baby plants that are about the length of a middle finger how high should this 3000 light be from those plants without burning them or hurting them I actually have the light about 4 ft from them right now is that too high
As one youtuber said - LUX is characteristic of visible light, that our eyes can observe. And we are not growing eyes))
Speak for yourself - I have a vat of fresh eyes gestating right now.
when you say heat stress would that make the plants look a bit droopy after a lot of light .. leaves looking saggy cant hold there own weight ?
good infos thank you for making this vid
“Lex Blazer” was almost my porno name. Thanks for the great content!
I’m planning on popping my sends in a mondi germination dome. I don’t wanna wait for the 2ft T5 25watt light to come. I already have a Raymatix HAMR light. What’s the recommended lux/PAR/PPFD for my germination and seeding stage for the first month? Any advice is appreciated thank you
Hey I have the sf4000 in a 5x5 I have it at 100% at about two feet I can’t figure out if this is good or should I raise the light . The plants are one month old about a foot tall and bushy as hell . I have topped it and everything I just don’t know . I have a lux meter
20'' canopy
250ppfd max on top
no lens
no reflector
8 weeks flowering
0.15$/W light fixtures
--------------------------------------
0.9g/W
Great job man... sorry this place is giving you shit a lot of growers are having the exact same problem. It's sad to see at this time and age where we should be more advanced in knowledge and acceptance. We're still binded by our grandparents old ways there will be a day brother...
There will be day. Just keep doing you.
Love the channel, love the content. One question. If sunlight is 2000+ umol/s in nature why do you recommend using levels so much lower? I run my grow tent above 1500 umol /s at all times, and in flower as high as 2500 umol /s with excellent results.
+1 I finished my first grow...LSD-25 autoflower at about 1200 PPFD using Bloom Plus 3000 LED. Only plant I grew gave me just over 2 oz of dense, smelly, sticky flavorful, and very effective buds. Yeah for me!
How are you altering umol? More lights or do you have a light where you can alter the PPFD
@@Alchem1stt Current control drivers, or number of lights; or both. There is no realistic way to replicate sunlight though, not even close
@@fakename7570 I expect at least 1g / W of electrical light power. With a 300W LED source I pull 10-12oz of top grade buds. That said, sunlight puts this to shame. I'm confident I'm not even at half, maybe even a quarter of the light I need to max out yields, but I really have no way to know
@@ansmerek thanks for the quick reply. Doesn't a 300w light lose a lot of PPF even at 2ftx2ft? It falls down to 120 PAR at the edges, how can this be viable if 600-900 PPFD is desirable for flowering?
Hey Lex, I got a question and really hope you can answer...
I am growing 10 regular Afghani kush plants and they are 32 days old from seed, and I tried to rub my fingers around the main stem up and down to smell them, and 8 of those plants smells very soft and flowery (delicious), while the other two smells like sweat and piss, kinda like what you smell if you run on a treadmill at the gym...
My question is, is that a good indicator to sexing my plants? like do I have 8 females and 2 males right now?
Thanks in advance and hope you have a great day!
NO NO NO. A better indicator would be the pre-sexual traits at the nodes of young plants. Male plants have a penis or knob looking mini structure (stamina) at the node lol. What you are describing is genetics. All seeds contain different genetics - different phenotypes and genotypes. Go do some research. Also males plants grow taller and more distance between the nodes or branches (leggy).
Thank you
Hello I would like to ask if a Mars Hydro TS 3000 LED Grow Light at 1095.6 umol/m2/s is adequate for a filled 4.5ft x 4.5ft tent!
Would you instead go with something different? Thank you & Keep it Growin!
Mid day sun is around 2000 ppfd
Finally a video about PAR rather than lux because that's mostly meaningless
now, now, lux isn't meaningless; tell that to outdoor growers. But PAR is more useful indoor for both optimizing light intensity AND making sure the lights you're using are actually what you think you paid for.
@@LexBlazer that's a fair point, lux gives you a reasonable indication of light conditions outside. Even inside for some lights, but with these LEDs lux is pretty useless though. Regardless, PAR gives a much better indication of what a plant will do than lux, so I much prefer it.
DARE YA TO SMOKE A BONG FULL OF KILLER FLOWER !
Very useful
Ty brotha
So how far would from your plants would you keep 2 Aglex 2000 watt lights with just the cobs on? Asking for a friend...
Thanks bro