The Perfect Pre-Roll: A Comprehensive Guide to Ground Flower Preparation


In the rapidly evolving world of cannabis, the demand for high-quality, consistent, and convenient products is at an all-time high. Among the various offerings, pre-rolled cannabis joints, or “pre-rolls,” have emerged as a popular choice for both seasoned connoisseurs and newcomers alike. These ready-to-smoke products offer a hassle-free experience, eliminating the need for grinding, rolling, and sealing. But what goes into creating the perfect pre-roll?

The answer lies in meticulous preparation, precise execution, and adherence to stringent quality standards. It’s a complex process that requires careful handling of the cannabis flower, from grinding to sifting, drying, and finally, rolling. Any deviation from the established norms can lead to inconsistencies in size, weight, density, and even the overall smoking experience.

Enter the LeafyPack Apollo Pro, a state-of-the-art machine designed to automate the pre-roll production process. With its advanced technology and user-friendly interface, the Apollo Pro promises to revolutionize the way pre-rolls are made. But like any sophisticated machinery, it requires proper guidance and a well-defined Standard Operating Procedure (SOP) to unleash its full potential.

In this comprehensive guide, we will delve into the SOP developed by LeafyPack for the Apollo Pro. This SOP is a culmination of extensive research, industry insights, and practical experience. Prepared with utmost precision, it serves as a roadmap for preparing cannabis flower for pre-roll production.

The SOP not only outlines the step-by-step procedures but also emphasizes the importance of hygiene, sanitation, employee training, equipment maintenance, safety protocols, documentation, and responsible waste disposal. It’s a holistic approach that ensures a consistent grind size, optimal moisture content, and contaminant-free cannabis material, resulting in high-quality pre-roll products.

Whether you are a cannabis producer looking to scale your operations, a quality control expert aiming for perfection, or simply a curious enthusiast wanting to understand the behind-the-scenes of pre-roll production, this guide is for you. So, let’s embark on this enlightening journey and explore the SOP needed to create the perfect pre-roll with the LeafyPack Apollo Pro.

Purpose and Scope

The SOP aims to provide clear instructions for preparing cannabis flower for pre-roll production, ensuring a consistent grind size, proper moisture content, and a contaminant-free product. It guides individuals through the processes of grinding, sifting, drying, moisture content testing, cone fitment testing, storage, and quality control.

Supplies and Equipment

  • Cannabis Flower: The raw material to be processed.
  • Mill or Grinder: To achieve a consistent 2mm particle size.
  • Sifter or Sieve: For sifting the ground cannabis.
  • NSF-rated Baking Sheet: For drying the sifted cannabis.
  • Well-ventilated Area: For drying the cannabis.
  • Airtight Containers: For storing the prepared cannabis material.
  • Scale: For measuring the weight of the ground cannabis.
  • Pre-roll Cones: For the cone fitment test.
  • Gloves: To ensure cleanliness.


The SOP emphasizes:

  • Hygiene and Sanitation: Strict protocols to minimize contamination.
  • Employee Training: Comprehensive training on SOP and safety.
  • Equipment Maintenance: Regular maintenance for consistent results.
  • Safety Procedures: To protect employees from potential hazards.
  • Documentation: Thorough documentation for traceability.
  • Waste Disposal: Responsible practices in accordance with regulations.


1. Grinding the Cannabis Flower

1.1. Clean hands and workspace to ensure no contaminants.
1.2. Load the grinder with cannabis flower, avoiding overfilling.
1.3. Grind the flower until it reaches a consistent 2mm particle size, consulting a supervisor or the grinder’s instructions if needed.

2. Sifting the Ground Cannabis

2.1. Prepare the sifter by placing it over a clean container or table.
2.2. Pour the ground cannabis onto the sifter.
2.3. Gently shake the sifter to remove large pieces or sharp objects, such as stems, ensuring no particles smaller than 2mm are present.

3. Drying the Sifted Cannabis

3.1. Spread the sifted cannabis thinly and evenly across an NSF-rated baking sheet.
3.2. Leave the baking sheet in a well-ventilated area, away from direct sunlight, for a minimum of 24 hours, monitoring temperature and humidity levels.

4. Additional Drying (if needed)

4.1. Re-spread the sifted cannabis thinly and evenly on the baking sheet.
4.2. Extend drying time for another 24 hours, monitoring temperature and humidity levels.

5. Testing Moisture Content (Naked Pre-Roll Test)

5.1. Gently squeeze a small amount of the ground cannabis flower in your hand.
5.2. Check for clumping; if the material forms clumps, it is too wet and requires additional drying.
5.3. Repeat drying process if needed.

6. Cone Fitment Test

6.1. Manually fill a pre-roll cone with the ground cannabis flower, filling it to the top.
6.2. Empty the cone and weigh the ground cannabis material; re-prep the flower if the weight is less than the desired pre-roll weight.
6.3. Ensure the ground cannabis flower freely flows into the cone and has a minimum of 25% headspace at the top for proper cone closure.

7. Storing the Prepared Cannabis

7.1. Transfer the prepared cannabis material to airtight containers for storage.
7.2. Seal the containers properly to maintain freshness and prevent contamination.
7.3. Store the containers in a cool, dry place, away from direct sunlight and heat sources.

8. Quality Control

8.1. Test the cannabis material for potency to ensure it meets specifications.
8.2. Test for contaminants, such as pesticides and mold, to ensure product safety.
8.3. Regularly test the cannabis material for moisture content to maintain ideal levels.

These procedures, when followed meticulously, ensure that the cannabis flower is prepared with the utmost care and precision, resulting in a consistent and high-quality end product. The SOP emphasizes the importance of each step, providing clear instructions that can be followed by individuals with no prior experience, thereby democratizing the process of pre-roll manufacturing.


FlowerThe bud or flowering part of the cannabis plant containing the highest concentration of cannabinoids.
Mill or GrinderA mechanical device designed to break down cannabis flower into smaller particles.
Sifter or SieveA kitchen utensil consisting of a wire or plastic mesh held in a frame.
Well Ventilated AreaA space where air is allowed to circulate freely.
Air Tight ContainersStorage containers with a seal that prevents the exchange of air.
ScaleAn instrument used for measuring the weight or mass of an object.
Pre-Roll ConesPre-fabricated, cone-shaped paper or hemp wraps designed to be filled with ground cannabis material.
GlovesProtective hand coverings made from materials like latex, nitrile, or vinyl.

Quality Control

Quality Control MeasureDescription
Visual InspectionRegular inspection of the cannabis flower for signs of mold, pests, or other contaminants before grinding.
Grind ConsistencyEnsuring that the grinder is well-maintained and properly adjusted to achieve a uniform 2mm particle size.
Sifting QualityVerifying that the sifter or sieve effectively removes large particles, sharp objects, and stems from the ground cannabis material.
Moisture ContentRegularly testing the moisture content of the ground cannabis to maintain the ideal levels (9-11%). Utilize a moisture meter for accurate measurements.
Cone Fitment TestPerforming cone fitment tests to ensure the ground cannabis freely flows into the cone, fills it correctly, and leaves adequate headspace for proper closure.
Potency TestingTesting the potency of the cannabis material (e.g., THC and CBD levels) to ensure it meets the required specifications.
Contaminant TestingRegularly testing the cannabis material for contaminants, such as pesticides, mold, heavy metals, and residual solvents.
Weight AccuracyVerifying that the pre-roll cones are consistently filled to the desired weight, making any necessary adjustments to the filling process as needed.
Storage ConditionsMonitoring the storage conditions (temperature, humidity, and light exposure) to maintain the freshness and quality of the prepared cannabis material.
Batch TrackingImplementing a batch tracking system to trace the origin, processing steps, and quality control checks for each batch of cannabis material used in pre-roll production.


The SOP for the LeafyPack Apollo Pro offers a comprehensive guide to automating the perfect cannabis pre-roll. By adhering to these guidelines, producers can ensure a consistent, high-quality product that meets industry standards and satisfies customer expectations. Whether you’re a seasoned expert or a newcomer to the field, this SOP provides the tools and insights needed to excel in the world of cannabis pre-roll production. For more information, contact us below.