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Great video straight to the point. How does CO2 affect the optimal temperature? Since the most efficient way is to slowly increase CO2 EC and PAR... would be optimal to do the same with temperature or keep it at some point? Thanks!
I think the technical aspects,was ott,as to contemplate reaching that levle of technical pro-ess with a grow,you should have alot of grows under your belt,and if you don't know by this time about your plants,rather than seeking this level of technical input,I'd stop growing! I think your optimum audience is better aimed at novice grower's,with a lower technical aspects,
Thank you so much for presenting data. Most of the grow guides on you tube also give great info but without the data its hard to make informed decisions on how to fix your grow.
I love that youre usimg a pier reviewed paper. I took 4 mycelium and coco bags and opened them and put them in a tote. Now i just feed my mycelium oatmeal. The co2 stays at 1750 as suggested by utah state Bruce bugbee and harvey from npk university videos. The relative humidity is in the high 80s and so i need to vent the humidity off while retaining the co2. So enter the dehumidifier. Now i have a terarium powered by led only light and mycelium farmed co2.
Do you have any advice on maintaining these relatively high temperatures in cool climates? It seems impossible to heat air (cost)effectively when you're expelling it once a minute. When you do recirculate air, say your intake and output are connected to the same indoors and heated room, would that not cause harm or stress to the plants by lack of actual fresh air?
Even the most efficient grow lights emmit 50% heat. There is plenty of heat can be used to keep the temperature up during cold periods. Extracting low in winter with a high inlet will help. However during cold periods you are correct you must lower the extraction rate to maintain temperatures.
I will have a tent setup indoors but there is no way to do ducting and getting the external air in or out directly from the tent. So my question is would it be ok to just circulate the air in and out of the tent indoors? The house itself is big and the people living in it providing co2 with additionaly multiple daily opening of the windows with fresh air should work right?
Shane...awesome video...keep them coming...fyi..light intensity is reduced by a square value and only a 50 percent in height increase will reduce par by 100 % percent
With adding co2 the chart u posted didn’t go past 700 ppm. At what point does the growth rate start to level out? What is the best cost effective amount of co2 to add? 1,000ppm? 1400 ppm?
A hard to answer question for me is the optimum 850 max par study and if it was done on a 12-12, or an 18-6? Also if 12-12 is max 850 par than can I run 8 on 16 off at a higher par for the same DLI level? (est 1100-1250 par). For now I just leave it at 11 on and raise it to 850, then taper down to 10hrs in the last two weeks for natures DLI curve to preserve terpenes. I use 12-1 and it recommends 8 hr flowering as cannabis is a short day flowering plant. But then DLI and this max 850 par has me wondering if its possible without co2, as cannabis grows at night and can benefit from longer nights, while studies show it's done taking up light after 8 hours.
Co2 is heavy therefore falls to the floor. If you have your exhale co2 bag above a fan , it will be spread throughout your grow tent BEFORE being sucked through your exhaust , therefore it does not need to be closed circuit.
We’re going to be living on a boat and want to grow some basic greens and herbs. Do you think this could be successful? How would you suggest going about it? We’lll be in tropical climates most of the time. Love your channel!
Hi Shane. You do great work. I totally find your videos comprehensive and easy to understand. The heat gun trick, awesome! I grow my garden outside for almost 4 months. I start my plants in early June and bring them inside when the Autumn rains come. The plants are 5-6 feet tall. This year 13 plants! I grow them in 8 gallon grow bags so they are movable. Going from real sunlight to LED. I have 5-6 years of this method, Always successful. But I always worried about light burn and setting distance. You just provided me with the tools to set this variable, thank you, thank you, thank you. Jeff from Seattle USA.
I would love to see an updated and expanded version of this video. Maybe combining some of your other experiments into it, or just a real world demonstration of the research.
From my research it seems like the plants only need the extra Co2 when the light is on so only run the vent fan when the lights are off and only add it during the light cycle ! And it may only be needed during weeks 2 to 6 and any other time the Co2 will most likely be wasted ! Is this correct or I need to do more research !
@@matik4165 I don't think it'll work like that given global warming and the changing climate. It'll be starvation for millions if not billions in the long run.
Great video! Question: I am growing Peppers under a Spectro Light Blast 400w. But the fruits on all the plants are half the size compared to my outdoor plants. Is it correct that the amount of light hours should drop to increase frutation? And should there be a difference in night and day temperature? Thx greet Gijs
I don't understand why u need 60 times x hr renew the inside air. To decrease temperature . If I use air conditioning inside the room set at 25 C degrees and keep close and inject CO2 . Is this a way to keep the best indoor condition ?
I have a co2 tank and controller in my tent. I exhaust my tent with an in-line fan into the room. I have no problem keeping my co2 1200-1500, but s 10lb tank lasts me less than a week $$$
A question: In a closed environment with plants, does raised levels of CO2, in itself, lower air temperature? This provided the input light energy is constant. Thanks!
Co2 isnt necessary unless the light is hot which would be from high par. It will heat the leaf and bud regardless. You want to add co2 in buding stage if you have a nice high par light. Check leaf temp and keep your leaf temp about 80 humidity 70. As long as your leaves arent stressing your golden. Keep your pots between 68/72f at all times.
I think you forgot about humidity because that along with temperature control the rate of transpiration. You can have everything else perfect but if you mess up too bad on the VPD you will fail to succeed with your grow.
From an HVAC point of view 1 air change per min makes no sense. What about lights off when plants dont use CO2? Or the humidity or temp outside are highly out of spec?
Why does the plant need less light for veg then to flower? In nature it world receive more light in summer then it would get going into flowering in the fall. Am I missing something?
First, flowering requires a lot more energy than is needed to make leaves. It helps to think of plants as humans. If a plant has female or perfect flowers, it will produce seeds in the fruit. Seeds are the offsring (babies), so when a woman is pregnant, she eats for two, right? Plants eat light. "Plant food" for fertilizer is a total misnomer since the equivalent of fertilizer is vitamins. Anyway, a pregnant plant (or one getting ready to be pregnant) will be "eating for two" and will need more light. If a pregnant woman was trying to eat nothing but prenatal vitamins, it would be a disaster, but unfortunately, people treat plants this way. They think that fertilizer is plant "food" because of the fertilizer companies calling it this to sell more of it, but plant food is light.
@@alexb6821 as other posters have mentioned this is false, but there's actually a good reason for this misconception. Near as I can tell this belief came from the idea that if you pruned back a plant that was forming fruit then it would put more energy into the fruit than the flowers and that it needs less light since the leaves are gone. The first part about energy is technically correct but for a different reason than light levels. When a plant is stressed it puts more energy into the production of fruit because there is a chance that the plant may not survive so having more viable fruit is more effective at keeping that species alive, this is why stressing out your tomato plants with an aspirin spray will yield more flavorful fruit. In trimming back the leaves your plant is afraid it will die so puts more energy into that fruit but that energy comes from chemical energy already stored in (mostly) it's roots. Whether you prune back or not the plant will be requiring more energy for that fruit to grow but the question is are you taking that energy from another part of the plant or from the light you are providing it? This is why you need more light for flowering/fruiting than vegging.
I have been wanting to add an LED some where in my grow set-up. I have been saving for one your lights are amazing for the indoor grower thank you for making lighting for the home grower cant wait to try one of your great lights
MIGRO all the led lights I have seen say that they need to be switched off after 5or6 hours off use & need to cool down for 20 mins are they all like that ??? so for a 600watt bulb I would need 4 300watt 3leds lights and alternate so some can rest is that the idea or can u name a led lights to replace my 600watt 😎🌲
Hello. You don't need to switch off LED lights to cool them down and you can switch them on and off quickly. To replace a 600w hps the MIGRO 400 will give you more light and a better yield. Thank you for your comment
Hello, Shane. Thanks for the informative video. It seems like Migro makes a very quality led light solution. I am in the researching process of purchasing a proper led light. So far I like what I am hearing/reading. What would you recommend for a 10 plant grow in 5 gallon smart pots? Thanks again!
Excellent video thank you for all the information you put out for everyone I have been subscribed to your channel for about a year now and you you have taught me alot so once again thanks and please continue to keep posting new content and information.
I'm pretty sure you can fill a 10x10' room with CO2 and it would take a good 8 hours for the plants to lower those levels to atmospheric. You don't NEED to remove entire room volume every minute... thats required in a lab/clean room maybe... not around some plants I don't think. Mine seem to grow fine anyway with just a few full exchanges of air per day... then I can keep CO2 high in that area for a good 8 hours a day.
@@jeanninegrant5959 1800 is definitely not optimal lol that's too high even if your PPFD levels are above 1500 and your temperature is perfect. Too high for vegetative. Did you not watch the video??
Well done, thanks a lot. Btw you need a shop and a distributor here in Canada, there is going to be a huge market in a less 8 months the cannabis is going to be legal and we will be able to grow at least 4 plants each. And that without those who has a med licence like people like me.... Big market to come... Way to go MIGRO for making great products!
Hi, If you are in flower humidity should be between 40% to 50% if possible, lights on temps 25C to 28c and lights off temps 4 to 5 degrees cooler is fine.
Doesn't growing mushrooms create extra co2 in the room? Just thinking it's probably the cheapest easiest way to increase co2 in a grow tent. Only heard that haven't evidence to support
Intaking air from inside an occupied building might be good during light time but sure it is bad during dark time. The best balance comes to intake from outside no matter what the outside conditions are. If you you have your room/tent set up properly it will autoregulate easily.
@@MIGROLIGHT During light time more CO2 is needed thus intaking from a room might be better than outside. During dark time more O2 is needed thus intaking from outside would be better. Usually its better to intake from outside as O2/CO2 balance during day/night is better for the plant than inside air balance.
@@arnauvizcarramiserachs6318 It depends a lot on the outside. Your breathing create a lot of co², 1000 ppm is not rare especially on winter with windows rarely opens. So intraction from a livingroom is the most effective way (except co² bottles in closed room/tent). But even in that situation, 1000 ppm = 0.1% while O² is about 20%, so I think the plant has plenty O² at night.. I will check this to be sure.
Great video. I want to do a test of ambient c02 vs c02 levels in a living space ie bedroom/house/apartment. I wonder if the increase in c02 would be significant enough to benefit the plant or if it would be negligible.
Acording to the article he reffered to: "Furthermore, elevated CO2 may increase photosynthetic carbon assimilation and may accelerate plant growth and potentially improve productivity. Indeed, a doubling in CO2 concentration increases crop yield by 30% or more, in experiments conducted under close environmental conditions such as green houses and growth chambers (Kimball, 1983a, b; 1986; Cure, 1985; Poorter, 1993; Idso and Idso, 1994)."
You failed to give us what CO2 number is the maximum the plant can process. I've seen reports of 1200 ppm that claim above that is frivolous. Does this agree with your research or experiences?
So my room is sealed and I keep the co2 anywhere form 1000 -1200 I thinking maybe 1500 when going from veg to bud. With a Humboldt indica strain. They seem to be loving it. Would u raise or lower co2 respectively? Nice vid. Thanks
Funny you should say about bringing natural higher levels of co2 from people sleeping in the same building as a place in london out performs a place in the suburbs both same set up and same plants except, suburbs = 1800 to 2000g london one 2000 to 2400g all ways breaking records down there ,and I put it down to higher co2 levels as london is highly populated
you can make beer near de growing tent with the fermentator blowoff dropping Co2 into the indoor ..then you can drink your own beer and smoke your own weed
We all had to begin somewhere! Remember how confusing it was to get started? Especially before the internet how to's (if you're unlucky enough to be my vintage lol)
@@IAmAllThatIs is that actual wattage or equivalent wattage? Because often manufacturers will see the numbers like how an LED bulb foe your house light have a number saying 60w replacement but it's actually 9w. How much power do they actually draw from your outlet?
@@IAmAllThatIs I would suggest around double that amount of grow light power because you need about 35 watts per square foot on average. Am I correct in reading that your grow area is 3*1.5 meters? If so then that would be about 9*4.5 feet that gives about 40 square feet, slightly more actually, and 35 watts per square foot would be about 1400 watts. Depending on how you have your room structures you may be able to insulate it and the heat from the grow lights maybe could raise the temp to the required temperature. To help more we would likely need more information about your grow area, how it's insulated, method of air conditioning, etc.
Vpd is important when your pushing temps upwards of 30c. If you have 40% humidity and using co2 ill bet my lunch that your wasting a vast amount of co2. Getting humidity up to 60-65% is needed with 30c temps...
hi there bud i like your cob light they really rock . my question tho is this , so i hear that hid ballsts will run MH or HPS or some ballasts will run both . but what if ur ballast is for a metal halide bulb and u put a hps bulb in it instead but then the hps bulb seems to work ok . is this still ok to do or would i be pissing in the wind ?? thanks migro
What you need is called a co2 controller. I bought one to go w/ my co2 regulator (which will run off of a co2 tank) Unfortunately, I haven't hooked it up yet. But , I believe that's what you need. Best of luck!
