Herbies

ScrOG Growing Method

scrog

The Screen of Green technique (ScrOG) is an increasingly popular advanced growing technique that allows an efficient use of small grow spaces. ScrOG involves the use of high-stress training techniques – such as topping and lollipopping – in combination with a screen to create a dense, structured canopy. With the help of this method, plants are trained to grow horizontally during vegetation, thus receiving an equal amount of light.

 

1. What is ScrOG?

1.1. ScrOG usage

2. Tools for ScrOG
3. How to ScrOG
4. Plant placement

4.1. Screen
4.2. Vegetative state
4.3. Flowering stage
4.4. Yield increase

5. Strains for ScrOG
6. Useful tips

 

Why use SCRoG? Let’s look at how this training method can help you make the most of your plants.

What Is ScrOG?

ScrOG relies on topping buds and then using a screen to encourage horizontal growth on each branch, starting from vegetative growth all the way to a few weeks into flowering. Each branch is weaved into the holes in the screen until a beautiful, even canopy of colas is created.

A keen eye for pruning is necessary as the lovely, thick canopy of buds blocks any light from reaching buds and leaves below the screen. These should be pruned to prevent the plant from wasting energy that could otherwise be redirected for growth elsewhere.

Why ScrOG Your Plants?

The main benefit of ScrOG is the big boost to your final yields, since the horizontal growth of each branch exposes multiple nodes to the light, which in turn encourages the development of multiple buds. ScrOG is also a popular technique for space-conscious growers. The time dedicated to horizontal growth can drastically decrease final plant height, which can be particularly useful for Sativa-dominant plants that tend to grow quite tall.

small cannabis strainsView tiny plants

Equipment For ScrOG

scrog net

Here are all the things you’ll need to get started.

Screen

There are a number of materials that can be used for the screen itself, but the most popular are string, twine/hemp cord or a pre-made nylon screen. Stay clear of chicken wire/fishing lines, as these have a tendency to cut into your buds and stems.

Scissors

These are essential for pruning underneath the canopy. For best results, make sure they’re sharp and sterile.

Large Pots

Your plants need to be transferred into their final pot (> 5 gallons) before the screen is used, as once it’s on, you can’t move your plants around. They’ll be tied to the screen and moving them will only undo all your hard work!

How To Grow Cannabis Using ScrOG

Follow this simple step-by-step guide for best results:

Step 1

scrog method

Set up a screen between 20-25 inches (50-60cm) from the pot.

Step 2

Top your plants between the 3rd and 5th node to create extra colas.

Step 3

When the tops start hitting the screen, weave them through the holes to encourage horizontal growth and secure with ties if required.

Step 4

Prune any side branches or large leaves beneath the screen.

Step 5

Switch to flower when you’re happy with the horizontal growth, or when 70% of the screen is covered.

Step 6

Continue horizontal growth for a few weeks into flowering for the most even canopy.

Step 7

Let your plants grow vertically until you’re ready for harvest!

Ideal Plant Placement For ScrOG

scrog grow

It’s important to find the right balance for plant placement. You don’t want them to be crowded, but having large empty spaces in the canopy is also undesirable. A good rule of thumb is 11 x 11 inches (30 x 30cm) per plant, which allows enough space for growth while still retaining an even canopy.

Setting Up The Screen

Whether you’re using a pre-made nylon screen or creating one yourself with string, you want each hole to have an area of 2 x 2 inches (5 x 5cm). The screen needs to be connected at four points; most cultivators use a vertical extension at each corner of the tent where the screen can be attached. You can either attach this one corner at a time, stretching as you go, or you can attach it loosely to all four points at once and then tighten it later. Screens are generally placed as close to the light as possible, around 8 x 9 inches (20-25cm) above the medium.

Vegetative State & ScrOGing

Plants need to be topped between the nodes, as this creates the ‘arms’ which can then be encouraged to grow horizontally. Often used in conjunction with 4-way LST, this is the practice of topping each main cola, twice. This creates 4 symmetrical arms poised for horizontal growth while still delivering big, juicy buds.

Flowering Stage & ScrOGing

During this stage, your plant is going to try its hardest to grow vertically, and it’s your job to make sure it doesn’t. Try to gently guide each branch into its own hole within the screen – this will ensure it has enough space to grow into. It will be very helpful to work methodically; take one plant at a time, beginning with the corners and edges of the screen before working your way to the middle.

How Much Does ScrOG Increase Yields?

scrog cannabis

The short answer: a lot! The average cultivator reports a 20% increase in yield when using the ScrOG technique in comparison to traditional methods. The added benefit is also the high quality of buds obtained, as the even canopy ensures that each bud can bloom to its maximum potential.

Which Strains Are Good for ScrOGing?

Most strains will respond well to this technique, Sativas and Indicas alike. This also means it can complement hybrid genetics well. The key characteristics needed for a good ScrOG strain is a short flowering period, steady growth, a small to medium final height, and strong yet flexible branches.

Check out the strains below that will make your first ScrOG grow a pleasure due to their features.

Auto Glueberry OG

Auto Glueberry OG is a fantastic Sativa-dominant autoflowering cannabis strain for ScrOG due to its short flowering period and steady growth! With THC levels of up to 26%, you’re sure to love growing this energizing hybrid!

Jack Herer (Green House Seeds)

Jack Herer is a classic Sativa that needs no introduction. A cross between Haze and Red Skunk, this hybrid grows exceptionally well indoors, bringing in yields of up to 800 g/m2 (28oz/ft2).

Marmalate Early Version strain

Maramalate Early is the perfect strain for ScrOG growth due to its robust genetics that give it excellent tolerance to the high-stress techniques involved with ScrOG. Growers love this fruity strain for its great taste, excellent growth pattern and a 45-day flowering period!

Useful Tips

To ensure best results from the ScrOG method, follow these tips that will help you avoid mold issues and protect plants from diseases.

Air Flow

Creating a dense canopy can affect the air flow within the tent, so keeping an eye on this is crucial as it can cause mold. Using air-cooled lamps is an effective way of controlling the temperature and humidity.

Maintenance

Make sure to keep an eye on any growth underneath the screen and remove fan leaves on the bottom. This will help to stimulate the canopy growth and fatten up your buds. Besides, regular pruning is a way to prevent diseases resulting from the lack of light to bottom leaves.

***

With its intricate appearance, ScrOG can be off-putting to those who are new to advanced cannabis cultivation techniques, but we hope the tips given in this article will give you the confidence needed to start your own ScrOG grow!

What strain will you ScrOG first? We’d love to see your comments and learn about your own ScrOGging experience!

scrog cannabisOpen collection
Comments:
0
Andrew J
I have decided on going with the scrog method because it seems like I will increase my harvest by a whole lot more. It makes sense to me, make it to where mostly all of the plant is being utilized by the light. No valuable watts will be wasted. I must ask though, in your opinion is it better to flip to 12/12 once 50%, 60% or 70% of the screen as been filled up? And approx. how long will it take me to be ready to flip to 12/12 once the seed starts germinating? Trying to get a better time frame down here. Also I need to ask, is 18 inches a good distance to have the screen above the plants to grow to?
Reply

0
Herbies
Hello Andrew, it is better to let the plants cover 70% of the screen. You may take an experiment, if you want. Screen is better to be instaled about 20-25 cm above planting area, although may differ from strain to strain. At this point, you may find alot of advises from experienced growers and see that they differ from each other a bit due to their personal preferences
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mcvue420
From what ive deduced fill the screen before flip will give you longer cola's and utilizes the sapce better. Seems to be no "right" % with many saying 70%-80%.
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Grape Skate
Years ago I read from someone (i dont remember who) that they used to do like 80% and now always go 100%. Fill the net 100% and get 10 inch colas Fill the net 80% and get 5 inch colas. Now i dont know if thats true or not but does make some kind of sense to me.
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1
ppp789
Thanks for the tips!
Reply
1
Herbies
You're welcome!
Reply
1
moon777
A great little scrog article... i found it answered a lot of questions i had regarding the scrog method and i hope it helps other noobs too!
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Herbies
Thank you Moon, we are happy to provide assistance
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Josh
Don’t let yourself fck up the whole plant like I did! Make sure you’re in your final pot before you start weaving! That was a complete mess when I tried repotting, everything ripped lol
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jontomas
Very thought out and well put together tutorial.
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