Scrogging Tutorial - Learn How To Scrog In easy 5 Steps

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Scrogging Tutorial – Learn How To Scrog In 5 Easy Steps

Scrogging Tutorial – Learn How To Scrog In 5 Easy Steps

Many of you marijuana growers have probably heard the term “ScrOG” before. Much like many growing techniques, scrogging marijuana strives to make the process a little bit easier and a lot more beneficial. The term “ScrOG” is an abbreviation of “Screen of Green.”

The idea behind the scrog method is to optimize your lights and to bring lower buds up to the top of the canopy where they could produce higher yields. It’s a method that has been around for a while (prior to high-intensity discharge—HID—lamps) and has been used effectively, even with basic fluorescent lights.

Don’t want to read? Watch the video!

Scroggin in 5 easy steps

1. Place a screen at 20 to 25 inches from the pots
2. Cut off the top cola of each plant
3. Prune bottom branches when top hits the screen
4. Force into flowering 2 days after pruning bottom
5. Attach all branches horizontally to the screen

Perhaps the most important thing to have with this setup is a scrog screen, generally some kind of wire or even a tight rope. A sturdy screen that can hold back the top canopy and has 2-inch by 2-inch squares built in will certainly be adequate. Screens are also the most important aspects of scrogging.

You are effectively “training” the marijuana plants to grow in your desired direction without having to do anything harsh that could affect growth adversely. The distance between pots and the screen should be 20 to 25 inches

This is particularly useful for individuals who either have limited vertical space or limited light emission. Having a screen over the top of the plants, keeps them lower, but it also allows the light to concentrate more evenly on each of the plants. In addition, horizontal growth will still produce useful plants in the long run. Download my free marijuana grow bible at this link and learn to grow like a pro!

How to scrog

But, the scrogging method isn’t all about setting up a screen and watching your marijuana grow. Although very little work is involved in general, you will still need to take great care if you want to scrog correctly.

One of the first things you’ll want to do is cut the top colas off of each plant when the plant is around 10 inches tall. This encouraged the plant to create new branches that you can manipulate in any way you please. The ideal way to manipulate the new branches is to wait until they have reached the screen. At this point, the tops of the branches will be slightly poking through one of the holes in the screen.

You’ll want to continue to take each branch from each plant and move them over to the next hole so that horizontal growth can continue relatively unimpeded. Or bend and attach all the branches to the screen with some wire horizontally.

When to scrog

Obviously, if you let the plants continue to grow vertically, you’ll run out of space. However, if the marijuana plants are “trained” to grow horizontally, you will ultimately get more yield and a better canopy later on.

Just before the top of the plant hits the screen, cut off all the small branches and side shoots at the bottom. This give a boost to the top colas because there will be no energy wasted on the growth of useless and small side shoots and fluffy buds.

The process of taking the branches out of one hole in the screen and placing them in a hole farther away from the plant base is often referred to as “tucking.” This should be carried out with the utmost care as any breakages can cause your marijuana plants to reduce growth. Some marijuana growers like to make their screens adjustable so that they can raise the “ceiling” if the growth becomes too abundant. This is really beneficial if you want to keep your plants in vegetative state for as long as you can.

Another way to ensure that the plants produce higher yields is by maintaining a relatively even canopy all the way across. This will involve cutting off the top portion of a plant to shorten it and also make room for deviations in the branches. The more branches you have, the more you can continue tucking. Since the growth is diversified and the light is hitting every viable part of the plants, the yield will increase when harvest time comes around.

When to flower

Because scrogging represents an indoor growth technique, the shift between vegetative state and flowering state will be up to the individual grower. The timing should be ideal, but there are many different factors in play. For instance, if you’re using a hydroponic system, you might be able to take the plants from vegetative growth into flowering within a matter of only 3 to 4 weeks. If the plants are in soil, it should take around 6 to 8 weeks.

Forcing flowering is something that almost takes an intuition. You can see when the plants have sort of maxed out in their vegetative state. You will obviously want to visualize how much the plants will continue to grow once they enter flowering. When you decide to go for it, put the plants on a 12/12 light regimen.

Then, growth will start to increase as the plants begin to flower extensively. Carefully train all branches and shoots through their individual slots in the screen. I always force my marijuana plants into flower just before they start to grow through the screen.

Scrog yield

From there, the yield will start to take shape, and you’ll be rewarded with almost double the buds of a normal crop. Be sure to take extra caution while training the plants during flowering. They will naturally start to stretch through the holes in the screen and it’s important to not be too rough with them. Keeping the area below the canopy well-ventilated will also help reduce the risk of mold.

After that, you can start harvesting and enjoying your increased “ScrOG” crop.

Thanks for reading. Please leave comments or questions below and don’t forget to download my free grow bible.


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Comment Section

35 thoughts on “Scrogging Tutorial – Learn How To Scrog In 5 Easy Steps

By Laura on 21 April 2013

Hello, i am learning so much with all this information, but at the same time i am very sad because i realize that my plants are growing very slow 🙁 you said that i might be able to take the plants from vegetative growth into flowering within a matter of only 6 to 8 weeks in soil, but i have like 5 weeks with mines and they are 11 cm and only 5 sets of leaves. I have them indoors, with soil, fluorescent bulbs.
Dont know what i am doing wrong, maybe the seeds were too old?

By eldenvron on 29 April 2013

I have seen videos of scroggs where they use the vegetable trellis netting, this is what I thought I would try. My only issue is the spacing you mention in between pots. I have all of my pots centered under my main light ( a 90 watt led grow lamp) and three 200 watt cfls on the sides of the pots to cover the lighting they might not pick up from the led lamp. Will a scrogg screen help me increase yeild even though my space between pots has to be so limited?

By George on 6 April 2015

What kind of bulbs are you using and how many watts each? I grow with cfl bulbs also and it’s going great till now. Im into flowering for three weeks using scrog method. No problems or complains at all. I would gladly help you if you need something

By Jared on 29 April 2016

Hey Laura , a variety of factors could be slowing your growth. So u know your soil ph? Nutrients? Light n wattage? Grow room temps n humidity? Jus asking so I can help 🙂

By Jared on 29 April 2016

I was gonna say if I had to bet. It’s a lighting n temp/humidity problem. And prolly very little nutrients..

By Kelley two feathers on 24 May 2016

Try heat pads under your pots cold roots are not Happy

By 1600p on 4 May 2013

Laura, it could be anything. However, I’d say based on your description, you may have a lighting issue. Get better lighting. And check your nutes.

By John on 28 June 2013

how many plants can i grow with scrog in a 4x4x6 tent? I have 1000 w MH/HPS and good ventilation/smell control but heat topped out at 85f. 8 oz first time, didn’t veg long enough under cfl lights

By Robert Bergman on 28 June 2013

Hi John,

I would recommend between 10 and 20 plants. With 10 plants you have to veg a little longer but the investment in marijuana seeds, soil and containers is lower. If you grow on soil use 6 gallon pots if you go for 10 plants and 3 gallon pots with 20 plants. Choose a dominant sativa marijuana strain like amnesia or super silver haze because they tend to grow tall. Rule of thumb; switch to 12/12 when plants are touching each other


By David on 31 October 2013

Amazing information! I’ve learned a lot and look forward to applying this knowledge. One question I have is about the stage where the plant starts growing through the screen, and your clipping it down with a tie to make it grow horizontal. You say the “the branch keeps growing, repeat the previous steps.” Do you mean- continue to tie down the branch multiple times across different “squares” when it grows up/vertical every couple inches?

Lastly, if you don’t mind, could you please give a brief description of what a good “horizontal field” looks like?

Thanks so much! I really appreciate it! Once again, your information is invaluable!

By mountainmike on 4 March 2016

Did your questions ever get answered about repeating the process of tying the branches down? It is a little unclear to me. Do you have multiple attachment points to the screen on each horizontal branch, or just repeat with all branches that come through the screen?

By Ben on 20 July 2014

Hello i am wanting to grow outside but woried about people passing and smelling it what seeds are the least smelling when in flower ? thanks

By Leonard on 28 July 2014

On my 3rd grow using scrog nets using rdwc 2 containers with 10″ net pods with 2 ladies per net pod total 4 plants, last grow had 3 sour diesel and a new one catatonic. All plants scroged to a pvc frame with mason line and screws to form 2″ squares 2 frames that tie together and form a 4′ by 10′ scrog I use two 600 watt lights my last yield produced from these four plants was 23 oz cleaned.

By Bowman on 5 October 2015

no shit? awesome

By sifu on 28 July 2014

Hi All, Notsure if this is the correct thread for this post.

I have access to two L= 7.2m H=2.4m, W=2.4m spaces. My questions. How many lights?, Fan sizes? Best medium, cocoa, clay balls, soil? Strain? Fertilizer program and method to get the biggest yields.


By NEWEYGOOEY on 22 April 2016


By Jared on 29 April 2016

This is the fun part! Learning. Go with a LOW NPK value “organic soil” I like to amend 5 gal. Containers with 2lbs each of Coco coir.. Also some perlite, EWC, guano, and some love 🙂 I’m personally jumping on the LED train.. The high end ones. My platinum advanced LED p300 is perfect for my tent. Also have some supplemental CFLs. (1 huuge 86w 3200k CFL I will introduce at 12/12.. Built my scrog frame today from PVC.. Stay away from anything branded cannabis’s dreaded MIRACLE GROW! LOL. U could get some fox farms, or promix. But a homemade light. Organic concoction works well amended properly.. As for nutes. FF sells a 3 pack for all stages of growth. Grow Big, Big Bloom, and Tiger Blood.. Are the three they usually pkg together.. Start slow. 1/4 strength. If that doesn’t burn em. Go 1/2. You get the idea buddy 🙂 I love when people say it’s just a weed it’ll grow anywhere. True. But will it grow beefy and trichome LOADED though?? Do u check ur trichs before harvest? I prefer like 75% opaque, 25% Amber.. Grab a cheap pocket 10-100x microscope from radio shack.. Don’t go by hairs that are red. Go by trichome color.. Warning- if u harvest to soon (w clear trichs) , the high will be super disphoric and racey.. Heart beat fast. Essentially you’ll need a Xanax! Lol. Under ripe smoke not only sucks cuz u know u should waited 2 or 3 more weeks for some chronic.. Now all that said. I find the best advice is by trial.. For instance iv always my past grows work with out any ventilation. Well this time, I have a direct vent from AC duct + 6 inch booster fan. (25$ amazon ) to go in bottom, pulling in cold air, ordering my 460 cfm mountable exhaust fan, to pull hot, humid air out.. Temps r 75-80° atm w jus AC vent blowing into open closet w 2 fans.. Once I get my exhaust, il prolly go right back to tent. Cuz I’m scrogging. Found best way to mount screen in tent. Made a square out of a Daisy chain n threaded it around the 4 poles of my tents diameter, tightened into shape w a carabineer locking it closed.. 4 plastic zip ties on each corner (attached to tent frame and scrog. I feel the Daisy chain not only gives it a lil something to sit on, but I feel it will make adjusting screen height easier.. Hope I answered your questions, get some beans n get in the dirt! Or Coco, or hydro, or grow pebbles. Lol. Practice makes perfect. Iv yet to crack over one oz per plant. Pathetic. Well CFLs n window light do their best huh? It’s a shame. The sun where I live shines hard ask day, everyday.. However it’s the most humid spot in the country! Outdoor is tough in late August. Humidity gets up to 90% when sun goes down. Making last year’s outdoor sativa a pain to bring into a dark dry bathroom for its dark period.. Terrible yield. Excellent quality.. This one’s gonna be it. Will be ordering the next size up PLed p450 for next time for just veg room. Or maybe swap out the 450 to bloom. N 300 to veg.. Lmk hope it turns out [email protected] Com. This could be real old n I just wasted all this time writing this. Got some sour Jack ready to be packed into my bowl dammit!! Lol. Enjoy the journey. It’s better then the destination.. Nothing like fire smoke that u know u cultivated.. 🙂

By Jared on 29 April 2016

PS! 2 small, cheap things you should definitely! Invest in are a digital thermometer/hygrometer.. Constant eye on changing temps n humidity. Like 7$ at Walmart. N some sort of pH/fertility (amount of NPK present..) Meter. Alot of shade is thrown on those soil pH meters. Ppl say they don’t work. Always reads “7” no matter what. Well my 14$ Walmart meter is close enough to give me a VERY close estimate.. Cannabis in soil should actually be the same pH as milk.. Lol. 6.5-7 highest.. Since nutes get locked out of too alkaline/acidic soil.. Knowing you’re pH is key to making sure they’re eating properly.. Which only serves to better your final swollen kolas! Enjoy. Lmk

By Smok'n Pa. on 26 January 2015

Great information, I’ve tried different variations of this SCROG method without knowing I was doing it. Thanks your Lordship for the information. My next attempt will be with greater knowledge and preparation.

By david myers on 2 March 2015

Good info!

By MIKE PATTERSON on 4 March 2015

You learn every day, I grow indoor, and for the first time in almost 18 months have had great crops until my last one. My plants started to curl in the leaves however I was still doing the same things as before,a friend said to me it must be heat,so I lifted the lights and still no change,then it clicked,the lights were good however the U V had gone out of them and all they were doing was heating instead of lighting .So friends don,t run your lights for any more the 5 crops before you change your lights.Hope this fixes some problems.

By Duke on 17 May 2016

What lights were you using? I thought only LED had uv, and they last 50,000 hours?

By krowl on 31 March 2015

werden die pflanzen 2 mal getoppt??

By brazilian jhon on 23 July 2015

hi robert,

Very interesting information , helped me a lot. One of my big doubts about scrog is what can i do after watering for dont mess up my grow tent, if i cant move the plants its hard to throw away the water and this will elevate the humidity and if i left there will drown my plants roots.

keep growing

By latewood on 23 July 2015

Best method for a SCROG is Ebb and Flow. This allows you to have a reservoir that can be accessed easily for solution changes. Thanks everyone for the great feedback, and I invite you all to join our support forum. 🙂

By Jared on 29 April 2016

That hydro. It’s perfect. Flawless. It’s like dr Dre on CD. But good soil grown organic, indoor/outdoor is like Bob Dylan on vinyl 😉 tbh of love to try it. Hydro jus seems too much for me..

By Michael Cicchino on 30 July 2015

Hey gang, glad to have found these growing guides, they are great! My hat is off to you Robert and family! I have so many books on growing marijuana, ( Ed Rosenthal, Jorge Cervantes, to name a few ) and reading your guides has revealed more info to me than all of them. I love how simplistic your explanations are on different aspects of growing and flowering. I have learned a lot and am grateful to you. I have ordered several times from you guy’s and have a lot of the freebe seeds yet to be used. Thanks again, Mike

By Sam on 29 August 2015

I am using LED lights, very good results, very little heat, they won’t burn the plant even touching the leaves.. didn’t even notice it on my hydro bill.

By scottyBgood on 19 October 2015

I am now on my second Scrog screen in my Cabinet with a foot print of 2′ x 3″ and to help the buds along the 3″ edge I have used 45 degree elbows to create a Vscrog. the buds at the edges are a little closer because of light fall off on the edges.

just my thoughts.

By Jennifer ILGM on 19 October 2015

Thanks for sharing!

By James on 8 March 2016

This is my first time growing indoors and am a bit confused. Do you try to keep the shoot under the screen until
you come to a hole that is vacant and then bring it through? Perhaps this will become obvious once I get to that
point but for now I’m foggy. Thanks for any help you guys can give.

By latewood.ILGM on 9 March 2016

James. Most people start there plant and leg it fill out to 6-12″ and then build screen to correspond to the height of the plant, at that stage. Experienced growers can get away with setting up a screen before hand from past experience. Finally; This article stated to build your screen at 25″. This can vary up or down depending on strains and vessel size. (height)

Join our support forum. We have many helpful members that use this grow method. Happy Growing! 🙂

By big blue on 19 March 2016

great info u give out bob. iv had some great results scroggin .nice 1 bob ilgm.

By Diana on 1 April 2016

Hi there thanks for the info. I have been growing indoors for a few crops now but was wondering how to get a little bigger buds.Im wondering if tomato cages with screen on them would work?. i have 2 rooms set up so i need to be able to easily move from veg room to flower room.

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