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Cloning Cannabis Plants: A Step-by-Step Guide

Cloning Cannabis Plants

Cloning cannabis plants is a method of asexual reproduction that allows growers to replicate their best plants. This technique involves taking cuttings from a mother plant and rooting them to create genetically identical plants. Cloning ensures consistency in plant quality and can save time compared to growing from seeds. This comprehensive guide will provide a detailed, step-by-step process for successfully cloning cannabis plants, ensuring your clones thrive.

Why Clone Cannabis Plants?

Cloning offers several advantages over growing from seeds:

  • Genetic Consistency: Clones are genetically identical to the mother plant, ensuring consistent quality and characteristics such as growth rate, yield, and cannabinoid profile.
  • Time Efficiency: Clones skip the seedling stage, which can save weeks of growing time.
  • Cost-Effective: Cloning reduces the need to purchase seeds, which can be expensive.

Selecting a Mother Plant

The success of your clones starts with choosing a healthy and robust mother plant. Consider the following criteria when selecting a mother plant:

  • Health: The mother plant should be free of pests, diseases, and nutrient deficiencies.
  • Vigor: Choose a plant with strong growth characteristics and high yields.
  • Desired Traits: Select a plant with the desired cannabinoid profile, flavor, and aroma.

Preparing for Cloning

Before you start cloning, gather all necessary materials and prepare your workspace:

  • Materials Needed:
    • Sharp scissors or a razor blade
    • Cloning gel or powder
    • Rooting medium (rockwool cubes, peat pellets, or perlite)
    • Cloning tray and dome
    • Spray bottle with water
    • pH-adjusted water
    • Lighting (fluorescent or LED grow lights)
  • Workspace Preparation:
    • Sterilize all tools to prevent infection.
    • Ensure your workspace is clean and well-lit.
    • Prepare the rooting medium by soaking it in pH-adjusted water.

Step-by-Step Cloning Process

Step 1: Taking Cuttings

  1. Identify Suitable Branches: Select branches from the lower part of the mother plant. These branches often contain more rooting hormones and are more likely to root successfully.
  2. Make the Cut: Using a sharp, sterilized blade, cut a 4-6 inch branch at a 45-degree angle. This angle increases the surface area for rooting.
  3. Remove Lower Leaves: Trim the lower leaves from the cutting, leaving two to three sets of leaves at the top. Removing excess leaves reduces transpiration and helps the cutting focus on root development.
  4. Optional: Dip in Cloning Gel: Dip the cut end of the branch into cloning gel or powder to stimulate root growth. Cloning gels and powders contain hormones that promote root development and increase the success rate of your clones.

Step 2: Planting the Cuttings

  1. Prepare the Rooting Medium: If using rockwool cubes or peat pellets, ensure they are thoroughly soaked in pH-adjusted water.
  2. Insert the Cutting: Make a small hole in the rooting medium and gently insert the cutting about 1-2 inches deep. Press the medium around the stem to ensure good contact.
  3. Label Your Clones: If you are cloning multiple strains or phenotypes, label each clone to keep track of its genetics.

Step 3: Creating the Optimal Environment

  1. Place in Cloning Tray: Place the clones in a cloning tray and cover them with a humidity dome. The dome helps maintain high humidity levels, which are crucial for rooting.
  2. Lighting: Place the cloning tray under fluorescent or LED grow lights. Keep the lights on for 18-24 hours a day. Avoid intense lighting, as clones are delicate and can be easily stressed.
  3. Humidity and Temperature: Maintain high humidity (70-80%) and a temperature of around 75-80°F (24-27°C). Use a spray bottle to mist the clones and inside the dome several times a day to keep humidity levels high.
  4. Air Circulation: Ensure good air circulation to prevent mold and mildew. Occasionally open the dome for a few minutes to allow fresh air in.

Step 4: Monitoring and Maintenance

  1. Check Daily: Monitor the clones daily for signs of stress or disease. Remove any dead or yellowing leaves to prevent mold and disease.
  2. Misting: Continue misting the clones regularly to maintain high humidity.
  3. Root Development: After about 7-14 days, check for root development by gently tugging on the clones. If you feel resistance, roots are developing.

Transplanting Clones

Once your clones have developed a healthy root system, they are ready to be transplanted into their final growing medium.

Step 5: Preparing for Transplant

  1. Prepare the Growing Medium: Whether you are using soil, coco coir, or a hydroponic system, ensure the growing medium is properly prepared and pH-adjusted.
  2. Transplant Carefully: Handle the clones gently to avoid damaging the delicate roots. Plant them at the same depth they were in the rooting medium.

Step 6: Post-Transplant Care

  1. Watering: Water the clones immediately after transplanting to help them settle into their new environment. Use pH-adjusted water to prevent shock.
  2. Light Adjustment: Gradually introduce the clones to stronger light. Start with lower light intensity and gradually increase it over several days.
  3. Nutrient Feeding: Begin with a diluted nutrient solution to avoid nutrient burn. As the clones establish themselves, gradually increase the nutrient strength.

Troubleshooting Common Cloning Issues

Even with the best techniques, problems can arise. Here are some common cloning issues and their solutions:

  • Wilting Clones: This is often caused by low humidity or excessive light. Ensure high humidity and reduce light intensity if necessary.
  • Yellowing Leaves: Yellowing can be due to nutrient deficiencies or overwatering. Adjust your watering schedule and ensure the clones receive the right amount of nutrients.
  • Slow Root Development: If roots are slow to develop, check the temperature and humidity levels. Ensure they are within the optimal range. Additionally, consider using a heating mat to maintain consistent temperatures.

Benefits of Cloning

Cloning cannabis plants offers numerous benefits, including:

  • Uniformity: Clones provide uniformity in growth, yield, and quality, making them ideal for commercial growers and home cultivators aiming for consistent results.
  • Preservation of Genetics: Cloning allows growers to preserve the genetics of a particularly desirable plant. This is especially valuable for rare or exceptional strains.
  • Faster Harvests: Clones grow faster than plants from seeds because they skip the germination and early seedling stages. This leads to quicker harvests and more frequent cropping cycles.

Advanced Cloning Techniques

For experienced growers, advanced cloning techniques can further enhance success rates and plant health:

  • Tissue Culture Cloning: This method involves growing plant tissues in a sterile environment to produce clones. It is more complex but can produce a large number of clones from a small amount of plant material.
  • Air Layering: A technique where a branch is wounded and wrapped in moist medium to encourage root growth while still attached to the mother plant. Once roots develop, the branch is cut and planted as a clone.
  • Monster Cropping: Taking clones from flowering plants, which then revert to the vegetative stage and grow with multiple branches and bud sites. This can increase yields but requires more time for the clones to revert.


Cloning cannabis plants is an essential skill for any serious grower. By following this detailed, step-by-step guide, you can ensure a high success rate and produce robust, healthy clones. Whether you’re looking to preserve the genetics of your favorite strain or increase your garden’s productivity, cloning offers a reliable and efficient method to achieve your cultivation goals. With practice and attention to detail, you can master the art of cloning and enjoy the benefits of consistent, high-quality cannabis harvests.


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