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Screen of Green SCROG

Screen of Green (SCROG) Technique

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Screen of Green (SCROG), a groundbreaking technique, marks a significant evolution in the art of cannabis cultivation.

This method, swiftly adopted by both indoor and outdoor growers, excels in maximizing yield per square foot.

More than just a cultivation strategy, SCROG is a vital approach, ingeniously crafted to optimize every inch of your grow space, guiding each plant to reach its utmost potential and thrive.

Key Takeaways:

  1. Screen of Green (SCROG) is a cannabis cultivation technique that maximizes yield per square foot by training plants to grow horizontally.
  2. Pros of SCROG include space efficiency, even light distribution, improved airflow, and potential for higher yields.
  3. Cons of SCROG include cannabis strain selection, screen positioning, increased maintenance, and the need for precise environmental control.
  4. A step-by-step guide for implementing SCROG covers screen installation, plant training, vegetative stage management, transitioning to flowering, pruning, and environmental control.
  5. Key tips for success include proper screen placement, regular pruning, and attentive management of growth stages.
  6. SCROG offers enhanced yields and quality buds, making it an attractive option for both novice and experienced cannabis growers.

What is the Screen of Green Technique?

At its core, the Screen of Green method is a plant training technique that manipulates cannabis branches to grow horizontally rather than vertically.

This approach enhances light exposure to more flower nodes, resulting in a uniform and productive canopy.

Unlike other methods, SCROG requires a hands-on approach to guide and shape plant growth, making it distinct in its strategy and results.

Before You Get Started

Before starting a SCROG grow, it’s crucial to consider the space and equipment you’ll need.

This method is not just about planting and waiting; it requires an active involvement in shaping your plants.

From installing screens to understanding the right environmental conditions, setting up for SCROG demands attention to detail and a willingness to engage closely with your plants.


  • Space Efficiency: SCROG is ideal for making the most out of small grow spaces.
  • Light Distribution: Ensures even light penetration, critical for producing bigger yields and higher-quality buds.
  • Aeration: The open canopy improves airflow, reducing the risk of mold and diseases.
  • Yield Maximization: When done correctly, SCROG can yield more per plant compared to traditional methods.


  • Strain Selection: Not all cannabis strains are suitable for SCROG; it often favors sativa strains for their longer branches.
  • Screen Positioning: Placing the screen at the correct height is crucial for success.
  • Increased Maintenance: SCROG requires regular attention, including pruning and training the plants.
  • Environmental Control: Indoor setups need careful control of humidity and airflow to avoid issues.

How To Apply Screen of Green Method: A Step by Step Guide

Screen of Green (SCROG) requires a blend of strategic planning, patience, and a keen eye for detail.

This step-by-step guide is designed to navigate you through the intricacies of SCROG, from setting up your screen to the final stages of harvesting.

Each step is crucial in shaping a successful SCROG setup, ensuring that every branch and bud receives optimal light and space for growth.

1. Screen Installation

The first step in implementing SCROG is setting up the screen.

Select a screen with two-inch squares – options include plastic trellis netting or metal screens for durability and flexibility.

Install the screen about 20-30 cm above the base of the plants.

This height is crucial, as it determines how your plants will grow and spread.

The screen should be securely attached to a wall or post to ensure stability as your plants grow and intertwine.

2. Plant Training

Once your screen is in place, the next phase is plant training.

This involves guiding the branches through the screen evenly during the vegetative stage.

The goal here is to create a flat, even canopy that maximizes light exposure and promotes uniform bud development.

Top the central branches to encourage lateral growth and remove any branches that aren’t receiving adequate light or reaching the screen.

Be gentle but firm in weaving the branches around the screen, as this will dictate the overall shape and effectiveness of your canopy.

3. Vegetative Stage Management

During the vegetative stage, maintain a longer light cycle (typically 18 hours of light and 6 hours of darkness).

This stage is about setting the foundation for your SCROG setup.

Ensure that each plant receives equal light and space to spread.

Regularly adjust the branches as they grow, gently tucking and weaving them into the screen.

The aim is to cover as much of the screen as possible with green foliage before transitioning to the flowering stage.

4. Transitioning to Flowering Stage

When your plants have sufficiently covered the screen, it’s time to switch to the flowering stage.

Change the light cycle to 12 hours of light and 12 hours of darkness.

This shift signals the plants to start producing buds.

During this stage, continue to train new growth by tying it down and weaving it into the screen.

This will ensure that the buds develop evenly and receive optimal light.

5. Pruning and Maintenance

Pruning is a critical part of SCROG.

Regularly trim the foliage under the screen to redirect energy to the flowering tops.

This pruning also improves airflow around the plants, reducing the risk of mold and pests.

Additionally, remove any yellowing leaves or non-viable branches to maintain a healthy canopy.

6. Environmental Control and Monitoring

Maintaining the right environment is key to a successful SCROG setup.

Keep the humidity around 55% and ensure good airflow to prevent mold and mildew.

Monitor your plants closely for any signs of stress or nutrient deficiencies.

Adjustments in watering, feeding, and lighting might be necessary as your plants develop.

7. Harvesting

Once your plants have gone through the full flowering cycle and the trichomes have matured (usually indicated by a change in color), it’s time to harvest.

With SCROG, each plant will have numerous colas that have developed under the even light distribution, leading to a potentially larger yield per plant than other methods.

8. Post-Harvest and Resetting

After harvesting, it’s time to prepare for the next cycle.

Clean your screen thoroughly and reset your grow space.

If you’re using the same clones or similar strains, the process will be quicker as you’ll be familiar with their growth patterns.

Continuous improvement and adjustments based on previous experiences will enhance your SCROG technique over time, leading to even better yields and quality.

What to Avoid Doing

  • Improper Screen Placement: A screen too high or too low can impede optimal growth.
  • Neglecting Pruning: Regular pruning is essential in SCROG to ensure energy is directed to the canopy.
  • Mismanagement of Growth Stages: Each stage of growth in SCROG requires specific attention and adjustments.

How to Prevent

  • Pest and Disease Management: Regular checks and clean growing conditions can help prevent infestations.
  • Optimal Environmental Conditions: Controlling humidity and ensuring good airflow are key to healthy SCROG grows.
  • Plant Health Monitoring: Stay vigilant for signs of stress or nutrient deficiencies.


The Screen of Green method is a testament to the creativity and adaptability of cannabis cultivation.

While it presents unique challenges and requires a hands-on approach, the rewards of enhanced yields, better quality buds, and efficient space usage make it an attractive option for growers.

Whether you’re a seasoned cultivator or a curious novice, SCROG offers an opportunity to deepen your growing skills and achieve impressive results.


Screen of Green or short SCROG, is a cannabis cultivation technique. It involves using a screen to train plants to grow horizontally, creating a flat, even canopy for optimized light exposure and yield.

Screen of Green (SCROG) focuses on horizontal growth using a screen, optimizing light for fewer, larger plants. Sea of Green (SOG) involves growing many small plants close together to form a dense canopy, focusing on a quicker harvest cycle.

The SCROG method is a plant training technique in cannabis cultivation. It uses a screen to guide and spread plant branches horizontally, promoting even light distribution and larger bud development on fewer plants.

The yield in SCROG varies based on factors like plant genetics, grow conditions, and grower expertise. Generally, it produces higher yields per plant compared to untrained plants due to optimized light exposure and canopy management.

Start SCROG during the vegetative stage of cannabis growth. Ideally, begin when plants develop 4-5 nodes. This timing allows for effective branch training and canopy formation before flowering.

Low-Stress Training (LST) involves gently bending and tying down branches to control plant shape. SCROG, on the other hand, incorporates a screen to spread branches horizontally. While both methods aim to optimize light exposure, SCROG is more structured due to the use of a screen.