Growing cannabis at home can be a fulfilling endeavor, especially if you’re a patient with an Access to Cannabis for Medical Purposes Regulations ACMPR license in Canada. However, the journey from seed to harvest isn’t always smooth. Employing the most effective growing techniques can help maximize yield, potency, and overall plant health. This guide aims to outline some of these techniques.

Growing Techniques for ACMPR License

Selecting Genetics

The first step in your growing journey should involve careful selection of cannabis strains that match your medical needs, as well as your growing conditions.

  • Indica vs. Sativa: Indica strains generally have shorter flowering times and are well-suited for indoor grows, whereas Sativa strains are typically taller and may be better for outdoor growing.
  • CBD vs. THC: Choose strains based on the cannabinoid profile that matches your medical requirements.
  • Climate Consideration: If growing outdoors, pick strains that are suited to your local climate.

Soil vs. Hydroponic Systems

  • Soil: Organic growers often prefer soil for its ease and simplicity. High-quality organic soil contains nutrients that can help the plant grow naturally.
  • Hydroponics: A hydroponic system circulates a nutrient solution around the roots, offering more control over nutrient uptake. This method usually results in faster growth and higher yields but requires more equipment and attention.

Light Exposure

  • Indoor Lighting: High-intensity discharge lights (HID), compact fluorescent lights (CFL), and light-emitting diodes (LED) are popular options.
  • Light Cycle: Cannabis plants typically require a lot of light—generally 18-24 hours a day during the vegetative stage and 12 hours during the flowering stage.

Nutrient Management

  • Primary Nutrients: Nitrogen (N), Phosphorus (P), and Potassium (K) are crucial for plant growth.
  • Secondary Nutrients: Calcium, magnesium, and sulfur are also important.
  • Micro-nutrients: Trace amounts of elements like boron, copper, and zinc are also beneficial.

Climate Control

  • Temperature: Cannabis plants generally prefer temperatures between 20-30°C (68-86°F).
  • Humidity: Keep humidity around 40-60% for vegetative growth and around 40-50% for flowering.
  • Air Circulation: Proper ventilation can prevent mold and pests. Consider installing an exhaust fan and oscillating fans.


  • pH Level: Keep the water pH level between 6.0 and 7.0.
  • Overwatering: Overwatering can lead to root rot. Ensure the top layer of soil is dry before watering again.

Pruning and Training Techniques

  • Low-Stress Training (LST): Bend and secure plant branches to create an even canopy and encourage horizontal growth.
  • High-Stress Training (HST): Techniques like “topping” involve cutting off the top of the plant to encourage bushier growth.
  • Sea of Green (SoG): This technique involves growing many small plants close together to create a canopy of buds.


  • Trichome Observation: Use a microscope to check the color of the trichomes, which indicate maturity.
  • Flushing: Flush the plants with pure water 1-2 weeks before harvesting to remove nutrients and improve taste.

Compliance and Record-Keeping

Always abide by the rules stipulated in your ACMPR license, including plant count and storage limitations. Keep meticulous records of your growing process for compliance and to help you refine your techniques over time.

Growing medical cannabis with an ACMPR license allows you to take control of your medication. By employing effective growing techniques, you can maximize your yield and potency, ensuring you have a consistent, high-quality supply of medicine. Always stay updated with the latest growing techniques and regulations to make the most out of your home-growing journey.