How do I regenerate/rejuvenate a plant after harvest?

How do I regenerate/rejuvenate a plant after harvest?

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Rejuvenating Your Cannabis Plant After Harvest: A Comprehensive Grower's Guide​

Cannabis cultivation is as much an art as it is a science, involving a series of meticulous practices that make the difference between a mediocre harvest and a bountiful yield bursting with potency and flavor. One of the magical aspects of growing cannabis is its ability to provide multiple harvests from the same plant through a process called regeneration or rejuvenation. This 1500-word guide covers the ins and outs of regenerating your cannabis plant post-harvest, ensuring a sustainable and efficient growing cycle.

Understanding Cannabis Regeneration​

Regeneration in cannabis is the process of inducing a harvested plant back into its vegetative state, facilitating a new growth phase and additional harvests. This method not only prolongs the life of your cannabis plants but also contributes to a more sustainable grow operation by maximizing the yield from each plant. It’s also a testament to the resilience and adaptability of the cannabis plant.

Prerequisites for Successful Regeneration​

Successful regeneration of a cannabis plant requires careful consideration of several factors. Firstly, it's important to assess the viability of the strain. Some strains respond better to regeneration than others, so research the specific strain you're working with to determine its likelihood of success. Additionally, it's crucial to only consider plants that are in good health and free from diseases and pests. Regeneration can be a stressful process for the plant, so it's important to ensure that it's healthy enough to handle it.

Another key factor to consider is resource availability. Regeneration requires time, space, and additional nutrients, so make sure you have the necessary resources before beginning the process. In terms of time, regeneration can take several weeks, so plan accordingly and make sure you have the time to dedicate to it. You'll also need enough space to accommodate the regenerating plant, as well as any other plants you may be growing. Finally, you'll need to provide additional nutrients to the plant during the regeneration process. This may include fertilizer or other supplements designed to promote healthy growth.

Step-by-Step Guide to Rejuvenating Cannabis After Harvest​

1: Timely Harvesting​

The rejuvenation process begins even before you harvest. Cut the main cola and significant buds, but leave several lower branches with buds and leaves intact. These will become the primary sites for new growth during the regeneration process.

2: Post-Harvest Pruning​

Immediately after harvesting the top buds, prune your plant. Remove any dead or dying leaves to prevent any potential pest or disease infestation. Time is of the essence; the sooner regeneration begins after harvest, the greater its chances of success.

3: Adjusting Light Cycles​

After harvesting and pruning, you must trick your plants into thinking it's spring again, nudging them back into the vegetative phase. Adjust your light cycle to 18 hours of light and 6 hours of darkness, which mimics the long days of the spring season.

4: Reassessing Nutrient Regimen​

During rejuvenation, your cannabis plant will require a different nutrient mix than it did during flowering. Shift to a high-nitrogen, low-phosphorus nutrient formula that supports leafy growth and root development for the vegetative state.

5: Monitoring Water Intake​

Be moderate with watering at the beginning of the regeneration process. Since the plant still has to develop new roots and foliage to support its water intake, overwatering can lead to complications. Adjust as the plant starts showing new growth.

6: Maintaining Ideal Environment​

Keep the environmental conditions optimal for vegetative growth, with temperatures between 70-85°F (21-29°C) and humidity around 60-70%. This will create an ideal atmosphere to encourage your cannabis plant to regenerate.

7: Observing New Growth​

In the weeks that follow, you should start to see new vegetative growth from the nodes left on the plant. These new shoots will eventually become the basis for your next harvest.

8: Pest and Disease Vigilance​

Watch for signs of pests and diseases closely, as a rejuvenating plant can be more susceptible to stress. Keep your grow space clean and monitor your plant regularly.

9: Structural Support​

As new growth becomes significant, provide support to your plant if needed. Regenerated plants can sometimes grow in less uniform patterns, and proper staking or trellising may be required.

10: Transitioning to Flowering​

Once your plant has established a strong vegetative structure again, and you’re ready for another round of buds, transition the light cycle back to 12 hours of light and 12 hours of darkness to encourage flowering.

Tips for a Successful Rejuvenation​

One of the most important things to keep in mind is the importance of allowing your plant to transition gradually through each phase of growth. This means giving your plant time to adjust to changes in lighting, nutrients, and other environmental factors as it moves from one stage of growth to the next. By allowing your plant to adjust slowly and steadily, you can help ensure that it stays healthy and strong throughout the regeneration process.

Another useful technique for regenerating cannabis plants is cloning. Some growers choose to take clones from the mother plant during the vegetative state before the first harvest, which can be an effective way to rejuvenate the plant and ensure that it continues to thrive. Cloning involves taking a cutting from the mother plant and rooting it in a separate container, where it can grow into a new plant with many of the same characteristics as the original. This can be a great way to preserve the genetics of a particularly strong or desirable plant, and can help ensure that you always have a healthy supply of high-quality cannabis on hand.

Finally, it's important to keep detailed records of your plant's progress throughout the regeneration process. This means keeping a journal of any changes or issues that arise, as well as tracking the plant's growth and development over time. By keeping detailed records, you can gain valuable insights into your plant's needs and preferences, and can make adjustments as needed to ensure that it continues to thrive.

Considerations and Potential Downsides​

One of the most significant drawbacks of regeneration is the potential for a decrease in yield and potency. While growers may initially experience a successful harvest, the regenerated plants may not always produce the same quantity or quality of product as the first crop. This can be frustrating for growers who were hoping to make the most of their resources.

In addition to potential yield and potency issues, the regeneration process can also be time-consuming and require a significant amount of effort. Unlike a traditional harvest, which can be completed in a relatively short amount of time, regeneration can take weeks or even months. This extended period of time can be taxing on growers who are already managing multiple crops.

Furthermore, the regeneration process can be stressful for the plant itself. The plant undergoes significant stress during the regeneration process, which can lead to a predisposition to hermaphroditism or reduced vigor. This can result in even further decreases in yield and potency, making the process less worthwhile for growers.


Regenerating a cannabis plant is a fascinating process that embodies the principles of sustainability and efficiency. It requires a good understanding of the plant’s growth cycles, attentive care, and the right techniques. By following this comprehensive guide, you can breathe new life into your cannabis plants, exploring the full potential of your harvests.

In the perpetual cycle of growth, bloom, and renewal, regeneration stands out as a testament to the enduring vitality of cannabis. Each regenerated plant brings with it not just the promise of another harvest but also a deeper connection to the grower's art. The process is more than just a repetition; it's an evolution and a dance with the natural resilience of this remarkable plant. So, when your harvest is done, remember that with the right care, your cannabis plant’s journey can begin anew. Happy growing!
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I have consistently been told over the years that a harvested plant CANNOT be revived. Now I know better. First person to shed true light on the question!
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