I would like to say I have been a subscriber since the pandemic. Had my notifications turned on and thus video. This video right here popped up today. Excellent work just sad I've been missing it
Hello, thanks for your videos. As I interpret the results the use of nitrogen is a sigificant factor in increasing the yield. And even if the cannabinoid ratio is lower, the total content should still be much higher with high nitrogen until a thresholf, I would consider as overfertilisation. I'm worried people will mistakenly interpret the video as, Nitrogen is bad for cannabinoid yield. Furthermore, I would like to ask for a video regarding the optimal NPK Ratio, and if it needs to change for flowering period or not. I checked all your fertilizer videos, and never seen that topic specifically mentioned. Overal it seems, that grower use way to much P and way to less N, since there is this myth that P is the main driver of bud growth. Bruce Bugbee e.g. recommends a 212 ratio through all stages as optimal.
great vid. is there a way to diagnose if you have too much N in ur soil? would it be visible like N toxicity? p.s. ur the best source for growers on youtube and ill die on that grave
I hope I don't offend you! But your a Nerd! And I mean that it the most complimentary way. I've learned so much just by watching and I want to thank you for your knowledge and expertise!
Thanks for sharing this. It's weird because when you learn about plants, you find that due to the complexity of biochemistry, there are no real rules as to what plants need to thrive, generally. Lots of plants will grow in just about any medium, some plants only grow on certain types of medium, but every plant has one which it can thrive in. This information goes to show the complexity of biosynthesis, and how little we understand about plants we feel very familiar with.
EDIT: 1) how does m_N [mg/L] correspond to the N-P-K values on my fertilizer bottles? 1 mL/L 4-3-6 = 40 mg/L N? 2) does N [% DW] mean total N-content of homogenised plant matter? 3) through whole vegetation it was 160 mg/L N, right? thank you for putting out that scintific weed content! 🌿🔬 love it, allways happy to see a new DBU video 💚
1. Take the nutrient values from the fertilizer you are using and the number is a percentage so a 4-3-6 fertilizer has 4% N or 4kg of N per 100kg of fertilizer. 2. Yes of the plant material including stems and leaves 3. Correct
Thank you for the video and this info on how to calculate the ppm of nitrogen. I've been trying to figure out a mix of the general hydroponics flora series to get me the concentration of N you recommend for flowering. This helps! @DeBaccoUniversity
Great video, thanks! I learned from Kymron DeCesare, at Steephill Labs, back around 2014 that pruning had no affect on biomass or cannabinoid yields. So I’ve been removing everything at end of week 3 and 7 of flower ever since with no issues. I didn’t know more info was needed to prove it.
@@DeBaccoUniversity i see. is there a study where high rates of N at veg then low rates of N at flowering. as i think that is what more people would be doing. thanks great video as always
@@uncle_creepy2743that's the old school standard and the one that I believe produces the highest yields of thc/cbd. The most successful hydro growers I know completely stop supplemental N as soon as they shift to flower light phase. But it is good to see real science confirming truths and rejecting myths. Cheers
Hello, great video. Is there any information on the time and/or frequency these plants were given fertilizer? Was Urea the only fertilizer used over the course of the entire study? Sorry if it was explained and I missed it.
This is interesting. It seems highly dependent on soil type and chemistry too. In southern Oregon where the soils have super high levels of magnesium, hemp farmers that added access available nitrogen saw a dramatic increase in THC levels. Studies conducted by OSU determined it was the access nitrogen farmers were adding.
Thanks for sharing, this can also depend on the starting nitrogen levels. Also the soils of southern Oregon tend to have noticeable clay and iron content which can impact the overall chemical properties.
@@DeBaccoUniversity yeah we used to joke that the soil was pure Epsom salt out there. I cultivate him in New Hampshire now and we use completely no-till methods and can take it all the way to fold maturity while testing below 0.3 total THC not just Delta 9
Alright, well, let's put this "Professor" jazz to rest, shall we? You are The Dean of Green, sir! Plus, it's been a while since I've said thank you. So, thank you for another superior and helpful explanation of things that I can actually understand. 😃👍
The plants need the N during Veg, but during flower they don't need much at all. They don't even need that much water. It's quality versus quantity when they are in flower. They use up the N pretty quickly in Veg stage, so as long as there aren't obvious signs of over fert then most plants will be fine to go through to flower. Dark green shiny leaves is N over fert. Deformed growth is a more severe sign.
Great study! Like your others. But I think it's half the truth. Fertilising cannabis consists of two parts: The first is nitrogen for growth and the second is phosphorus and potassium for flowering. So the final question is whether a higher growth rate of the leaves could result in bigger flowers or THC/CBD. May be it's a theme for a following study?
So if the parts facing the sun have more biomass, placing your pot on a rotating stand will provide an even amount of light! Been doing that for years now, seems to work fine. I just make sure it's off at night, so it doesn't affect the plants circadian rhythm!
Good morning from Arizona, I have questions of how to integrate different flowers or fruit in the soil so that way it can get a different smell then skunk weed, I'm a old school stoner and I remember when weed smelt good, and skunk weed was home grown or cheap weed, any suggestions would be greatly appreciated
were the authors studying applied N throughout both veg and flower phases, or N through flower phase only? Old school advice had always been to stop supplemental N at flower phase... so I understand this study to confirm that advice. BUT - if high levels of N during veg phase are detrimental - the I missed that message here and will need to review the source. Thank you again for sharing these studies - I appreciate the value you have added to our understanding - and business!
For the first 5-weeks all plant received the same fertilization amount and then from this point until harvest the tested rates were used until harvest.
Take your fertilizer Ex. 10-20-30 which is 10% nitrogen so for every 100 pounds of fertilizer you have 10 pound of Nitrogen. This may also help... ruclips.net/video/ZLh5zXCqkw8/видео.html
4:32 Its interesting to see cannabis behaving somewhat analagous to say vinis vinifera (wine grapes) in that too rich a soil/nutrient environment reduces the desired production (eg THC+CBD for cannabis & grape quality for vinis vinifera), whereas mild stress or even deficiency increases same. Conclusion: instead of being kind to our plants, we need to be more ... mean. 😂 /cracks whip at nearby sativa 😈
as a first time hobbyist grower ive read this and other studies. everyone told me that my off the shelve tomato fertilizer is bad in bloom (5-1-2) but looking at papers out there, finding a rough average gives me 5-1-3.5 (see below), which isnt far off, and closer to an off the shelve tomato fertilizer than all those expensive cannabis marketed "bloom" products. im not sure how to convert milliliters into milligrams on say 5ml/L of (5-1-2).. can i just calculate it with mass of N? but that would still be far off diminished returns due to overfeeding N is my guess. seems over-fertilizing N is much harder to do than stunt growth with too little and for a beginner like me its probably better to go a little heavy on N.. (thinking out loud) ------------------- Zheng, 2021 (1) N 194 mg/L P 59 mg/L K up to 150 mg/L Dilena, 2023 (2) N 60-210 mg/L Saloner and Bernstein, 2021 (3) N 160 mg/L Cockson, 2020 (4) P 11.25 - 22.5 mg/L Bugbee, 2022 (5) P 25 mg/L Saloner and Bernstein, 2021 (6) K 60 mg/L Yep, Zheng, 2020 (7) K 150 mg/L (∼2:1 ratio with N) ----------------------------------------------- N-P-K ⌀ [156] -[29.4]- [105] ~ 5-1-3.5
Many quality fertilizer options and it does depend in part in what you are growing your plants in. (New video on substrate comparisons in the works;-) Your tomato fertilizer may not have enough push, so you may want to add another come concentrated type to ensure the plants do not go hungry. For calculations, take your fertilizer (Tomato one for example) that is 5%N so for every 100 pounds of fertilizer you have... there are 5 pound of nitrogen.
You are the best RUclipsr ever! Pure information no games or click bait.✌️🖖🙏
Thanks for this wonderful comment! "Pure information no games or click bait." That is the intention of this channel, be sure to share it with others!
Couldn’t agree more
Great seeing you
Happy to be seen... even if it is just a small box in the corner of the screen;-)
I would like to say I have been a subscriber since the pandemic. Had my notifications turned on and thus video. This video right here popped up today. Excellent work just sad I've been missing it
It takes a lot of time to generate the content, but the goal is quality over quantity here.
Hello, thanks for your videos.
As I interpret the results the use of nitrogen is a sigificant factor in increasing the yield. And even if the cannabinoid ratio is lower, the total content should still be much higher with high nitrogen until a thresholf, I would consider as overfertilisation.
I'm worried people will mistakenly interpret the video as, Nitrogen is bad for cannabinoid yield.
Furthermore, I would like to ask for a video regarding the optimal NPK Ratio, and if it needs to change for flowering period or not. I checked all your fertilizer videos, and never seen that topic specifically mentioned.
Overal it seems, that grower use way to much P and way to less N, since there is this myth that P is the main driver of bud growth.
Bruce Bugbee e.g. recommends a 212 ratio through all stages as optimal.
Excessive nitrogen can negatively impact yield, but visually improve plant growth.
Once again fantastic information for which I can only say thank you so much 😘👍🏼
You are welcome and thanks for the subscription!
Grow your own.
Don't trust anything that's in a Dispensary for sho.
Certificate of Analysis is an important document...
I'm trying to find that sweet spot now. Thanks for the science!
Good luck and thanks for watching!
Thanks for the videos❤
No problem 😊 Thanks for the viewing and comment!
ty for the Video, great information as allways !
You are welcome!
🙂❤👍Thank You it has been a long time in between videos Great seeing you and your Great information you provide. 🙂❤👍
Yes, a little while since the last upload, but there are more planned to come out this month so keep an eye out;-)
@@DeBaccoUniversity Looking forward to them 🙂👍
thank you!!
You are welcome!
great vid. is there a way to diagnose if you have too much N in ur soil? would it be visible like N toxicity?
p.s. ur the best source for growers on youtube and ill die on that grave
i think if leaves are really deep green is an indicator, but ill let the expert speak
Too much nitrogen in your soil IS nitrogen toxicity.The leaves will look beefy and go a ridiculously deep shade of green.
Deep green is typically a key indicator along with brittle stems. Thanks for the comment and more cannabis related videos coming out this month;-)
good info.
Glad it was helpful!
You're back!
Thanks for the welcome more videos planned soon;-)
Thank you for your videos. You are the go to resource for all things
Thanks for this and be sure to share the channel with others!
amazing video!!
Glad you liked it!!
I hope I don't offend you! But your a Nerd! And I mean that it the most complimentary way. I've learned so much just by watching and I want to thank you for your knowledge and expertise!
No problem, I have been called worse;-)
Thanks for sharing this. It's weird because when you learn about plants, you find that due to the complexity of biochemistry, there are no real rules as to what plants need to thrive, generally. Lots of plants will grow in just about any medium, some plants only grow on certain types of medium, but every plant has one which it can thrive in.
This information goes to show the complexity of biosynthesis, and how little we understand about plants we feel very familiar with.
Keep on learning!
Thank you Doc…
You are very welcome!
Another good video- thanks. To the point and you convert the analytics to plain English!
That was the goal! Thanks for the subscription!
ty
Welcome.
EDIT:
1) how does m_N [mg/L] correspond to the N-P-K values on my fertilizer bottles?
1 mL/L 4-3-6 = 40 mg/L N?
2) does N [% DW] mean total N-content of homogenised plant matter?
3) through whole vegetation it was 160 mg/L N, right?
thank you for putting out that scintific weed content!
🌿🔬
love it, allways happy to see a new DBU video 💚
1. Take the nutrient values from the fertilizer you are using and the number is a percentage so a 4-3-6 fertilizer has 4% N or 4kg of N per 100kg of fertilizer.
2. Yes of the plant material including stems and leaves
3. Correct
@@DeBaccoUniversity thanks mate, much appreciated
Thank you for the video and this info on how to calculate the ppm of nitrogen. I've been trying to figure out a mix of the general hydroponics flora series to get me the concentration of N you recommend for flowering. This helps! @DeBaccoUniversity
So good! This is like gospel to me!
Glad to hear you liked it!
Wonderful.any work on adding silica?the dos and don’ts?
Thanks for the subscription and check out this DeBacco University video on Silica... ruclips.net/video/iUR7O4Hv53I/видео.html
Great video, thanks!
I learned from Kymron DeCesare, at Steephill Labs, back around 2014 that pruning had no affect on biomass or cannabinoid yields. So I’ve been removing everything at end of week 3 and 7 of flower ever since with no issues.
I didn’t know more info was needed to prove it.
Always nice to see data agree.
@@DeBaccoUniversity
For sure!!
Learning the hard way 🙈🙉🙊
Safe! Thank you for your energy 😊
At least you are learning!
@@DeBaccoUniversity indeed!
is that high nitrogen during veg, flower or both stages???
Nitrogen rates were kept the same for the full grow cycle.
@@DeBaccoUniversity i see. is there a study where high rates of N at veg then low rates of N at flowering. as i think that is what more people would be doing. thanks great video as always
@@uncle_creepy2743that's the old school standard and the one that I believe produces the highest yields of thc/cbd. The most successful hydro growers I know completely stop supplemental N as soon as they shift to flower light phase. But it is good to see real science confirming truths and rejecting myths. Cheers
Hello, great video. Is there any information on the time and/or frequency these plants were given fertilizer? Was Urea the only fertilizer used over the course of the entire study? Sorry if it was explained and I missed it.
Plants received 12-weeks of stated N levels for essentially the last 12-weeks of the growth cycle. See link in description for more details.
This is interesting. It seems highly dependent on soil type and chemistry too. In southern Oregon where the soils have super high levels of magnesium, hemp farmers that added access available nitrogen saw a dramatic increase in THC levels. Studies conducted by OSU determined it was the access nitrogen farmers were adding.
Thanks for sharing, this can also depend on the starting nitrogen levels. Also the soils of southern Oregon tend to have noticeable clay and iron content which can impact the overall chemical properties.
@@DeBaccoUniversity yeah we used to joke that the soil was pure Epsom salt out there. I cultivate him in New Hampshire now and we use completely no-till methods and can take it all the way to fold maturity while testing below 0.3 total THC not just Delta 9
@ Professor D, is using Bud Candy on your plant affects both cannabinoids and flavonoids of the final product?
According to the manufacturer it does, but no studies have done a scientific comparison of this product.
Alright, well, let's put this "Professor" jazz to rest, shall we? You are The Dean of Green, sir! Plus, it's been a while since I've said thank you. So, thank you for another superior and helpful explanation of things that I can actually understand. 😃👍
Wow, thanks! Interesting title... "Dean of Green";-) More videos set to come out this month so keep an eye out.
I'd love to be able to listen and watch a stream or podcast with you, Harley smith, Bruce bugbee and other people cannabis experts!
For now you have RUclips;-)
The plants need the N during Veg, but during flower they don't need much at all. They don't even need that much water. It's quality versus quantity when they are in flower. They use up the N pretty quickly in Veg stage, so as long as there aren't obvious signs of over fert then most plants will be fine to go through to flower. Dark green shiny leaves is N over fert. Deformed growth is a more severe sign.
Thanks for adding what growers should be on the look out for when it comes to N fertilizing.
Great study! Like your others. But I think it's half the truth. Fertilising cannabis consists of two parts: The first is nitrogen for growth and the second is phosphorus and potassium for flowering. So the final question is whether a higher growth rate of the leaves could result in bigger flowers or THC/CBD. May be it's a theme for a following study?
In the highest N treatment the leaves and plants were bigger, but the cananbinoid concentrations were less.
So if the parts facing the sun have more biomass, placing your pot on a rotating stand will provide an even amount of light! Been doing that for years now, seems to work fine. I just make sure it's off at night, so it doesn't affect the plants circadian rhythm!
Interesting, but there would still be a portion of the plant shaded.
Good morning from Arizona, I have questions of how to integrate different flowers or fruit in the soil so that way it can get a different smell then skunk weed, I'm a old school stoner and I remember when weed smelt good, and skunk weed was home grown or cheap weed, any suggestions would be greatly appreciated
It comes down to the variety you select so try and find a berry or lemon variety and it will be less skunk smelling.
were the authors studying applied N throughout both veg and flower phases, or N through flower phase only?
Old school advice had always been to stop supplemental N at flower phase... so I understand this study to confirm that advice.
BUT - if high levels of N during veg phase are detrimental - the I missed that message here and will need to review the source.
Thank you again for sharing these studies - I appreciate the value you have added to our understanding - and business!
For the first 5-weeks all plant received the same fertilization amount and then from this point until harvest the tested rates were used until harvest.
i'm number one
That was fast, happy to provide you with fresh new content.
Yeah great! You have won the ashtray of Jesus Christ. The original one.
Huge thanks!!! Pls don’t this for all of the nutes 🙏🏼
You are welcome, another video on Mg is in the works;-)
Very cool 😎
I wish I knew how to calculate my liquid fertilizer dilutiob so as to achieve 60 to 120 mg per liter.
Take your fertilizer Ex. 10-20-30 which is 10% nitrogen so for every 100 pounds of fertilizer you have 10 pound of Nitrogen.
This may also help... ruclips.net/video/ZLh5zXCqkw8/видео.html
Do high N and high amino acids effect plants cannabinoids the same?
Nitrogen for sure, based on the study.
Are aptus high concentration good ?
Aptus makes many products.
Great video. Please improve your mouse cursor visibility though :)
Follow the bouncing yellow dot;-)
4:32 Its interesting to see cannabis behaving somewhat analagous to say vinis vinifera (wine grapes) in that too rich a soil/nutrient environment reduces the desired production (eg THC+CBD for cannabis & grape quality for vinis vinifera), whereas mild stress or even deficiency increases same.
Conclusion: instead of being kind to our plants, we need to be more ... mean. 😂
/cracks whip at nearby sativa 😈
Tough love;-)
@@DeBaccoUniversity Sativas are bipolar, indicas are autistic. Tough love seemed a better fit for the former, if only as a metaphor. 😉
Organic. Or no organic fertilizer .
Not organic to ensure consistent plant availability.
@@DeBaccoUniversity ok I make nitrogen fertilizer out of ypung bamboo sprouts .. it appears I can give as much as I want. I've never seen any issues
Q: Do trippy mushrooms in the soil influence the cannabis plant?
Not sure.
My my
??
as a first time hobbyist grower ive read this and other studies. everyone told me that my off the shelve tomato fertilizer is bad in bloom (5-1-2) but looking at papers out there, finding a rough average gives me 5-1-3.5 (see below), which isnt far off, and closer to an off the shelve tomato fertilizer than all those expensive cannabis marketed "bloom" products.
im not sure how to convert milliliters into milligrams on say 5ml/L of (5-1-2).. can i just calculate it with mass of N? but that would still be far off diminished returns due to overfeeding N is my guess. seems over-fertilizing N is much harder to do than stunt growth with too little and for a beginner like me its probably better to go a little heavy on N.. (thinking out loud)
-------------------
Zheng, 2021 (1)
N 194 mg/L
P 59 mg/L
K up to 150 mg/L
Dilena, 2023 (2)
N 60-210 mg/L
Saloner and Bernstein, 2021 (3)
N 160 mg/L
Cockson, 2020 (4)
P 11.25 - 22.5 mg/L
Bugbee, 2022 (5)
P 25 mg/L
Saloner and Bernstein, 2021 (6)
K 60 mg/L
Yep, Zheng, 2020 (7)
K 150 mg/L (∼2:1 ratio with N)
-----------------------------------------------
N-P-K
⌀ [156] -[29.4]- [105]
~ 5-1-3.5
A good starting point.....
Veg...15-5-15 +5% .ca + mg
Bloom 10-30-20.
Many quality fertilizer options and it does depend in part in what you are growing your plants in. (New video on substrate comparisons in the works;-) Your tomato fertilizer may not have enough push, so you may want to add another come concentrated type to ensure the plants do not go hungry.
For calculations, take your fertilizer (Tomato one for example) that is 5%N so for every 100 pounds of fertilizer you have... there are 5 pound of nitrogen.