How can I get the same amount of yield as outdoor growth? (Light theory)

What I’ve realised was th the difference between outdoor and indoor growth is typically outdoors creates a larger plant with obviously more yield.

Do you think this is simply contributed to size of root growth and potientially a higher Calvin spectrum at night?

Because outdoor plants have one more room for root growth, higher humidity, higher wind strength, stronger light (sun), then a secondary strong light (moonlight). I’ve noticed that outdoor plants don’t get a lot of true darkness because of the moonlight. Maybe that effects growth and additional yield granted from out doors?

Do you think the same amount of growth and yield could be emulated in doors with the same kind of set up?

For instance let’s say I created 30 gal bucket (maybe deeper) instead of the typically 5 - 10. Add a light spectrum of 3500k or lower in the morning then switch to a 5000k or higher light at night. Still keeping the 24/0 light schedule for seeds to seedlings then 18/6 for veg to bloom.

Then maybe instead of having fans on at about the lowest start her off st around the half way or maybe 75 percent starting off and instead of having constant air flow have the wind pulsate and turn for about an hour or two every 3 or 4 hours. To slap her around and make the stems grow stronger.

With this method I’d use the organic method so feeding what be necessarily seeing as how it would be really hard to get measurements correct.

What do you guys think? I’m going to start this experiment in about a week when I get paid so I can buy the lights soil meters etc for my next grow.

@dbrn32 @Myfriendis410 @PurpNGold74 @Wildwest @Budbrother

Tag any outdoor growers to so we can have a better discussion. I will state this now I’ve neverbattempted an outdoor grow but based off my observations I cane up with this theory. But the goal is to dramatically improve indoor yield to manic or even surpass outdoor growth and yield.

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Goodluck with your venture dude but im out…i have only 1 indoor grow under my belt and halfway through my 2nd im still learning…:ok_hand:

Remember I’m new as well, it’s just a theory. I still technically haven’t finished my first one. But I have a lot of free seeds so before I spend a lot of money on buying more and more grow tents and actually plant set up I want to get a complete feel for exactly how I want to grow and the product I want for all of my harvest you know?

@Wildwest not only that it’s just an experiment I’m going to be running after I move back to the city and settle in. So maybe if my theory works could pave the way for a lot of bud sites, with bigger and more dense buds, but having the same taste and extra terpene production as indoors. That’s the goal at least.

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I haven’t seen anywhere dawn to dusk dimming actually make a difference. And moonlight is a thing, but there’s no real measured intensity. The seen spectrum that the sun produces changes a little, but it’s more like 5800k than 3500k.

Increasing pot size and veg time will certainly help your yields. But the biggest difference between outdoor growing and indoor growing is going to be light intensity. You’re going to spend a shit ton of money getting anywhere close, and then even more keeping up with co2 to make it useful.


Yea they call anything over 5000k - 6500k “daylight” because that’s the spectrum of the sun but the sun appears red to me instead of the blue tent. The moonlight more resembles the spectrum closer said to the sun but obviously that could be due to human perspection flaws.

The reason I suggested the red tent light in the morning and blue at night is because the red is said to promote growth so during the day I want them to grow as much as possible, then go to the blue spectrum before lights off to promote foliage and root development; making them denser and stronger. all that collected energy will be used in the dark to help them repair any lst I do, and to strength themselves from the high intensity wind from fan(s). @dbrn32

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Keep in mind by this point just about every light variation has been tried on cannabis to increase yield and we are all using variations of that now. There are some tricks you can perform with light when necessary but holding all of your parameters right in the middle of the nominal zone will give you the most consistent yields. That’s what indoor growers try for. Temp, humidity, light, nutes, space, airflow, CO2 etc all play into that.

Yes; a successful outdoor grow in a 100 gallon pot, in the ground for 4 months after veggin indoors in a container, will out produce a single indoor plant. But all of the other outdoor variables play into consistent yields. Bud rot, insects, weather, theft can lose your entire crop!

Personally I believe that my grow space is the most expensive real estate in my home and I want to maximize the output for my effort. Just sayin’…


That’s probably a difference in the color rendering index of the light source. 5000k 70cri spectral distribution

5000k 97 cri spectral distribution

I don’t want to deter you from what you’re planning, because we’ll certainly learn something. But it seems like your plan for blues and reds is backwards. The intensity from shorter wavelengths is generally higher mid day, and generally appears to be more red at dawn and dusk. That’s because the longer wavelengths aren’t as susceptible to scattering with distance and angular changes.


@dbrn32 @Myfriendis410 has you basically covered in all areas :wink: take what u will on board and persue as u wish because what works for one doesnt mean it will work for others!! Im in the uk and trying to stay off grid is work enough but i love the stuff what can i say :slight_smile:


i think you will find the difference is the power of the sun. the sun is more powerful on an over cast day then a 1000 wt mh. or hps. most artificial light just doesnt penetrate like the sun.


Also … unless you’re using auto flowering seeds , they will never flower with an 18/6 light cycle…
The plants need 12 hours of uninterrupted dark to trigger flowering… :wink:
But I guess you could still try your experiment and see what happens… :wink:



Ill ask a better question then. Why does outdoor growth produce more than indoor? Besides the presences of the sun.

Ill try placing them in an area where sunlight can be received as well as artifical.

@Wildwest my location in the usa is just as bad.

@dbrn32 its amazing how much there is to light. I didnt know that each type of company can produce different spectrum for their temperature in kelvins

Do you think minicing the sun’s method would be more beneficial? My plan wasnt to create an artifical sun with my light schudule, Im attempting to give the plants both types of spectrums of light in a single day just like the sun. Red in the morning to promote growth and blue later in the day to promote quality foliage. But seeing as how you said dusk n dawn produce more red light that would mean the sun produces blue light longer than red? So would it be safe to assume more red light means a time to switch to flowering for plants?

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Hmm when i did a little research (a very small amount) i saw that the sun produces about 1300 watts per square meter. I don’t think im going to be able to afford anywhere close to that. @oldpro

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I’m not sure I posted what I was trying to say clearly.

There are already lights available that start at low intensity with a dawn ish color spectrum, then ramp up to a high noonish color spectrum, and then ramp back down with a dawnish color spectrum. Outside of the particular manufacturers telling you it’s better, there’s nothing else to suggest you’ll get any different quality or quantity of weed doing that.

The sun pretty much produces the same light all the time. What changes is the distance to the sun and the angle at which light hits different parts of the earth at different times. Wavelengths like violet and blue are more prone to scattering at greater lengths and angularity than red wavelengths. So it appears that there’s less blue light at those times.


Hmm okay time to read more.

I think that’s called “Raleigh Scattering”. What produces our blue sky.

The only time I see a higher yield outdoors is because the plant is left to grow longer (and therefore bigger). I just watched @Bogleg harvest around 20 oz of trimmed bud from one indoor plant. The calculus has to include time in the equation.


That would make a lot of sense as well. Higher intensity in light for higher amounts of time would give the plants a possibility for higher photosynthesis if co2 was there to match.

I wonder what the sweet mark is for the ratio between the two @Myfriendis410

Outdoor you have potentially unlimited space and light - you are just limited by the clock. If you had a big enough space and enough indoor light, I think you could get a better yield indoors with the same growing season, personally. But I don’t think you’d get anywhere near the same return on investment.

I just harvested an indoor plant I filled a 4x4 SCROG with… it has a sister outside that is around 3 weeks into flower. So the outdoor plant got another month of veg time (and of course was never put on a screen). Assuming the outdoor plant doesn’t run into major bud rot issues (big assumption) I would guess it would produce twice the yield as the indoor one.


Do you think longer veg time in 18/6 ratio would contribute to bigger plants and more yield indoors?

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