Cannabis growers are constantly seeking new, more innovative ways to increase yields and streamline operations. That’s where re-vegging can come in. It’s a technique that’s causing quite a stir in grow rooms and greenhouses alike. This method, short for re-vegetating, is turning heads with a unique way to maximize plant potential.
But what exactly is re-vegging, and why are both home enthusiasts and commercial cultivators buzzing about it? At its core, this technique allows growers to coax multiple harvests from a single plant, potentially revolutionizing traditional growing cycles. As the cannabis industry continues to mature, techniques like re-vegging are gaining traction for their ability to optimize resources and push the boundaries of conventional cultivation practices.
Let’s explore why this method might just be the game-changer you’ve been waiting for.
What is re-vegging?
Re-vegging is the process of returning a flowering cannabis plant to its vegetative state. Typically, cannabis plants have a one-time flowering cycle, after which they die. However, by manipulating light cycles and pruning techniques, growers can coax a plant back into vegetative growth, essentially giving it a second life. Understanding the stages of marijuana growth is important for successful re-vegging.
According to a recent McKinsey & Well Company report on cannabis cultivation trends, re-vegging is gaining traction among cannabis growers looking to optimize their resources and increase profitability.
5 benefits of re-vegging weed plants
If you want to maximize your cannabis cultivation efficiency and profitability, re-vegging might just be the game-changer you’ve been searching for. Whether you’re a home enthusiast or a commercial cultivator, this progressive technique provides a host of advantages that can transform your marijuana growing operation.
Here are the top five most popular benefits of re-vegging your weed plants:
#1: Cost savings
Stretch your cannabis cultivation budget further by reusing the same plant. This clever approach dramatically reduces expenses on seeds, soil and other growing materials. It’s like getting a second (or third!) harvest for the price of one. Smart!
#2: Time efficiency
In the world of weed cultivation, time is money. Re-vegged weed plants often hit their stride faster than new seedlings so you can accelerate your production cycle and potentially increase your annual yield.
#3: Preservation of genetics
Found that perfect phenotype with just the right balance of terpenes and cannabinoids? Re-vegging gives you the power to maintain these prized genetics without the constant need for cloning. This ensures consistency across your product lineup.
#4: Space optimization
For growers that are working with limited growing space, re-vegging cannabis is a godsend. By getting multiple harvests from a single plant, you can maximize your yield per square foot. This method is ideal for small-scale or urban cultivation setups.
#5: Increased yield
Imagine doubling or even tripling your harvest from a single plant. That’s the power of re-vegging. By coaxing multiple flowering cycles from one plant, you can significantly boost your overall production and potentially increase your bottom line.
By incorporating re-vegging into your cultivation strategy, you’re not just growing cannabis; you’re optimizing your entire operation for efficiency and productivity. Next, let’s “dig into” implementing this powerful technique in your garden.
How to reveg weed plants: A step-by-step guide
Step 1. Harvest & prepare the plant
Proper preparation is vital for successful re-vegging of your marijuana plants. Here’s what you need to do to give your plant the best chance at a second life:
- Harvest the main cola and larger buds like you normally would.
- Leave 20-30% of the lower buds and foliage intact, including:
- 3-4 pairs of fan leaves
- Several small buds on lower branches
- At least 2-3 healthy branches with leaves
- Trim away any dead or yellowing leaves to prevent mold.
- Sanitize your pruning tools with isopropyl alcohol to prevent spreading pathogens.
Pro Tip: Choose a healthy, vigorous plant for re-vegging. Cannabis plants with strong genetics and robust growth are more likely to succeed.
Step 2. Adjust the light cycle
Light is the key driver for re-vegging. Follow these guidelines to create the right lighting conditions for your plants:
- Switch your light cycle to either:
- 18/6 (18 hours of light, 6 hours of darkness)
- 20/4 (20 hours of light, 4 hours of darkness)
- 24/0 (24 hours of continuous light)
- Use full-spectrum LED grow lights for best results.
- Gradually increase light intensity over 1-2 weeks to avoid light stress.
Light spectrum recommendation: Getting the right color balance can make a big difference. Here’s what to aim for:
- Vegetative stage: Higher blue light (5000-6500K)
- As new growth appears: Introduce more red light (2700-3000K).
While artificial lighting is commonly used, some growers have success growing cannabis indoors with natural light, which can be adapted for re-vegging as well.
3. Modify your nutrient regimen
Proper nutrition is essential for nudging your plant back into vegetative growth. Follow this feeding schedule to support your plant’s changing needs:
Week 1-2
- Reduce nitrogen levels to about 25% of normal vegetative feeding.
- Maintain normal levels of phosphorus and potassium.
- Use a Cal-Mag supplement to support new growth.
Week 3-4
- Gradually increase nitrogen levels as new growth appears.
- By week 4, return to a full vegetative nutrient schedule.
Nutrient tips: Pay close attention to these critical factors:
- Use a high-quality, cannabis-specific nutrient line.
- Monitor EC (Electrical Conductivity) and pH levels closely:
- EC: 0.8-1.2 mS/cm during early re-veg
- pH: 5.8-6.2 for soil, 5.5-6.0 for hydroponic systems
For more information on optimizing your nutrient regimen, check out our guide on nutrients and fertilizers for bigger buds.
4. Maintain proper environmental conditions
Creating the right environment is the secret for successful re-vegging. Here are the optimal conditions to aim for:
Temperature
- Day: 75-80°F (24-27°C)
- Night: 68-75°F (20-24°C)
- Avoid temperature swings greater than 10°F (5.5°C)
Humidity
- Early re-veg (Weeks 1-2): 60-70% RH
- Later re-veg (Weeks 3+): 50-60% RH
Air circulation
- Use oscillating fans to maintain gentle air movement.
- Ensure proper ventilation to prevent stagnant air pockets.
CO2 (optional)
- If using CO2 supplementation, maintain levels between 1000-1200 ppm.
Don’t forget about air circulation! For more information, check out our blog on tips for better air circulation in your grow room.
5. Watering & substrate care
Proper watering and substrate management are critical during the re-vegging process. Follow these guidelines to keep your plants happy:
- Reduce watering frequency initially, as the plant’s water needs decrease.
- Water only when the top inch of soil feels dry.
- Consider using fabric pots for improved root aeration.
- Apply a layer of mulch to retain moisture and protect roots.
Substrate pH: Maintaining the right pH is crucial for nutrient uptake. Here are the ideal ranges:
- Soil: 6.0-6.5
- Coco coir: 5.8-6.2
- Hydroponic: 5.5-6.0
6. Pruning & training during re-veg
Strategic pruning and training can significantly improve your re-vegging success. Here’s a timeline to follow:
Week 2-3
- Remove any remaining flower clusters to encourage vegetative growth.
- Lightly defoliate to improve light penetration to lower growth sites.
Week 4+
- Begin low-stress training (LST) techniques to shape the plant.
- Consider topping or FIMing once new growth is established to promote bushiness.
7. Pest & disease management
Re-vegging plants can be more susceptible to pests and diseases. Stay vigilant with these preventative strategies:
- Implement a preventative Integrated Pest Management (IPM) program.
- Regularly inspect plants for signs of pests or diseases.
- Use organic pest control methods when possible, such as neem oil or insecticidal soaps.
- Maintain a clean growing environment to minimize pest and disease pressure.
8. Monitoring & patience
Successful re-vegging requires close observation and patience. Here’s what to watch for:
- Keep a detailed grow journal to track progress and identify issues early.
- Take weekly photos to document changes in growth patterns.
- Be patient – major new growth may not appear for 2-4 weeks.
- Look for these signs of successful re-vegging:
- Unusual, single-finger leaves emerging from buds
- Renewed elongation of stems
- Increase in overall plant vigor
For more advanced pest management techniques, learn about more cannabis pesticides available for use in Colorado.
9. Transitioning back to full vegetative growth
Once your plant shows clear signs of re-vegging, it’s time to transition back to a normal growth routine. Follow these steps:
- Once new growth is established (usually after 3-4 weeks), gradually transition to a normal vegetative care routine.
- Increase fertilizer strength to full vegetative levels over 1-2 weeks.
- Resume regular pruning and training techniques.
- Prepare to either continue vegetative growth or flower again, depending on your goals.
Remember: each plant may respond differently to re-vegging, so be prepared to adjust your approach based on your specific plants’ needs.
Common challenges when re-vegging cannabis plants
While re-vegging can be a powerful technique in your cultivation arsenal, it’s not without its obstacles. Being aware of these potential pitfalls will help you navigate the re-vegging process more successfully. Let’s explore the common challenges you might face and how to overcome them:
Stress
The transition from flowering back to vegetative growth can be taxing on your plants. Keep an eye out for these stress indicators:
- Leaf curling or cupping
- Discoloration (yellowing or purpling)
- Stunted growth or leaf death
Pro Tip: Gradually adjust light and nutrient levels to minimize stress. Consider using a foliar spray with seaweed extract to support plant health during the transition.
Pests & diseases
Re-vegged plants can be more vulnerable to infestations and infections. Common issues include:
- Spider mites
- Powdery mildew
- Root rot
Implement a robust integrated pest management (IPM) strategy to prevent and address these problems. Regular inspections and preventative treatments are key.
Hermaphroditism
The stress of re-vegging can sometimes trigger hermaphroditic traits. Be vigilant for:
- Pollen sacs forming among female flowers
- “Nanners” (banana-shaped male flowers) appearing late in flowering
Remove any male flowers immediately to prevent unwanted pollination and seeding.
Nutrient imbalances
Re-vegged plants may have different nutritional needs. Be sure to watch for:
- Nutrient deficiencies (yellowing leaves, stunted growth)
- Nutrient burn (leaf tip browning, curling)
Adjust your feeding regimen based on plant response and consider using a high-quality, balanced nutrient line especially for cannabis.
Irregular growth patterns
Re-vegged plants might exhibit unusual growth:
- Single-finger leaves
- Excessive stretching
- Uneven canopy development
Be patient and consistent with your training techniques to guide the plant back to normal growth patterns.
Set yourself up for success with best practices
Now that we’ve covered the challenges, these best practices can help you master the art of re-vegging.
Here’s how to increase your chances of a successful re-veg and bountiful future harvests:
- Start with strong foundations: Choose healthy, vigorous plants for re-vegging. Look for:
- Robust root systems
- Thick, sturdy stems
- Vibrant, pest-free foliage
Plants that performed well in their first growth cycle are often good candidates for re-vegging.
- Create a pristine growing environment: Implement these practices:
- Regular sanitization of tools and equipment
- Proper air filtration and circulation
- Strict quarantine procedures for new plants
A clean grow space is key for preventing pest and disease issues.
- Invest in quality containers: Use high-quality containers that offer:
- Excellent drainage
- Adequate aeration
- Sufficient volume for root expansion
Proper root development is essential for successful re-vegging. Consider fabric pots or air pruning containers to promote healthy root growth.
- Keep meticulous records: Track the following:
- Light cycles and intensity
- Nutrient formulations and feeding schedules
- Environmental conditions (temperature, humidity, CO2 levels)
- Plant responses and growth rates
Detailed documentation will help you refine your technique over time. Use a dedicated grow journal or software to maintain consistent records.
- Master your pruning technique: Focus on:
- Removing most of the fan leaves
- Trimming away small buds and excess plant material
- Leaving several healthy bud sites and small branches for new growth
If you want to encourage new growth in your marijuana plants, proper pruning is integral.
- Optimize light spectrum and intensity: Tailor your lighting to support re-vegging:
- Start with a lower intensity and gradually increase
- Use a spectrum rich in blue light to promote vegetative growth
Consider adjustable spectrum LED lights for precise lighting control
- Monitor and adjust pH levels: Maintain optimal pH for nutrient uptake:
- Soil – 6.0-6.5
- Hydroponic – 5.5-6.0
Use a reliable pH meter and adjust as needed to ensure your plants can access all necessary nutrients.
- Practice patience: Re-vegging takes time. Resist the urge to over-manage your plants:
- Allow 2-4 weeks for new growth to appear
- Avoid excessive feeding or pruning during the initial transition
- Trust the process and let your plants guide your actions
Is re-vegging right for you?
While re-vegging can be a cost-effective strategy, it’s not suitable for every situation. Consider your goals, resources, and local regulations before implementing this technique. For commercial growers, cannabis market trends suggest that re-vegging can be particularly beneficial for craft cultivators focusing on unique strains.
From harvest to rebirth: Mastering the art of cannabis re-vegging
Re-vegging your weed plants is more than just a cultivation technique. It’s a way to revolutionize your growing operation. By harnessing the power of re-vegging, you can save money, preserve prized genetics and potentially increase your yields. It may seem challenging at first, but with patience, attention to detail and the right approach, you can master this valuable skill. Re-vegging offers many exciting possibilities!
Success in re-vegging comes down to creating the right environment, maintaining optimal nutrition and staying vigilant against potential issues. Remember: start small, keep detailed records and don’t be afraid to experiment. Who knows? Your next re-vegged plant might just become your most prized cultivar.
Happy growing, and may your gardens always be full of green!
