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How Much Weight Do Cannabis Buds Gain in the Last 2 Weeks

How Much Weight Do Cannabis Buds Gain in the Last 2 Weeks

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As the flowering cycle reaches its climax, cannabis growers observe a dramatic increase in bud weight, often witnessing up to a 25% growth in the final two weeks alone.

This critical period can significantly influence both yield and potency, making understanding and optimizing these last stages essential for cultivators aiming for the best returns from their plants.

Key Takeaways:

  1. Critical Phase for Growth: The final two weeks of the flowering stage are pivotal for maximizing cannabis bud development.
  2. Factors Influencing Growth: Genetics, lighting, and climate control play crucial roles in determining the weight gain during late-stage flowering.
  3. Nutrient Management: Adjusting phosphorus and potassium levels while controlling nitrogen intake and ensuring proper hydration can significantly impact bud size and quality.
  4. Strain Variability: Different strains exhibit varying growth patterns, with some showing significant late-stage growth compared to others.
  5. Optimal Harvest Timing: Harvesting at the right moment based on trichome maturity is essential for achieving desired potency and yield.
  6. Debate on Flushing: Flushing before harvest can enhance taste but may affect yield depending on strain and conditions.
  7. Conclusion: Careful attention to strain-specific needs and environmental factors is key to maximizing cultivation outcomes in the final weeks of flowering.

Understanding Bud Growth in the Last Two Weeks

The final fortnight of the flowering stage is not just a countdown to harvest but a critical window for cannabis buds to achieve their full potential.

This period is marked by significant physiological changes within the plant.

The buds thicken and mature as the plant shifts its energy towards maximizing resin production and floral expansion.

The importance of this phase cannot be overstated, as it dramatically influences both the quantity and quality of the yield.

Detailed Growth Patterns

From my own cultivation experience, during the early stages of flowering, cannabis buds are primarily forming their basic structure and cannabinoid profile.

However, as they enter the last two weeks, the growth rate accelerates exponentially.

Here’s how the transformation typically unfolds in one of my grow cycles:

  • Week 1: Buds begin to increase in density significantly. Each day, you can almost see them getting fuller, their aromatic profile intensifying.
  • Week 2: This is when the magic happens. Buds swell visibly day-by-day, often getting significantly heavier and stickier due to increased trichome production.

This surge isn’t uniform across all strains or even all plants within the same strain, reflecting a fascinating interplay of genetics and environment.

Factors Affecting Late Stage Bulking

In my years of growing, I’ve noted that several factors can either enhance or hinder the late-stage bulking of cannabis buds:

  • Genetics: Some strains, like the ‘Heavy Hitter,’ are genetically predisposed to put on significant mass towards the end of their flowering cycle.
  • Lighting: Although the weight gain during the final weeks is less dependent on light than earlier stages, maintaining optimal light intensity helps maximize photosynthesis and energy production.
  • Climate Control: Ideal conditions of humidity (around 40-50%) and temperature (between 68-77°F) are crucial. I once had a batch that suffered from suboptimal temperatures, and the bud growth was noticeably stunted.

Understanding and manipulating these factors can lead to dramatic improvements in bud size and quality.

Key Influences on Weight Gain

In the rush to harvest, understanding what drives weight gain during these final weeks can provide growers with a strategic advantage.

Role of Nutrients and Watering

During one particular grow, I adjusted the nutrient and water management in the final stages of flowering, which had a dramatic impact on the size and potency of the buds:

  • Phosphorus and Potassium Increase: These nutrients are vital during the late flowering stage, helping with bud formation and maturation.
  • Reduced Nitrogen: Lowering nitrogen intake helps the plant focus on bud rather than foliage production.
  • Adequate Watering: While overwatering can lead to issues like root rot, sufficient hydration is necessary to support the rapid growth and metabolic demands of maturing buds.

The Impact of Strain Genetics

Each strain has its unique blueprint for development.

Some might exhibit a slow and steady growth pattern, while others pack on significant weight in the latter stages.

For example, during the cultivation of ‘Northern Lights,’ I observed that it consistently exhibits robust late-stage growth compared to ‘Haze’ strains, which tend to show more gradual bud development throughout the flowering period.

Harvesting Strategies for Maximum Yield

Harvesting is as much an art as it is a science, requiring a careful balance of timing and technique to ensure maximum yield and potency.

Optimal Harvest Timing

Timing the harvest is crucial for capturing the peak potency and weight of cannabis buds.

The maturity of trichomes serves as the best indicator:

  • Clear Trichomes: The buds are still maturing.
  • Milky White Trichomes: Peak potency for THC-rich buds.
  • Amber Trichomes: Indicates high CBD levels but lower THC, often leading to a more relaxed effect.

In my experience, harvesting based on these visual cues allows growers to tailor the effects of their product to meet specific preferences.

The Pros and Cons of Flushing Before Harvest

The technique of flushing – ceasing nutrient delivery and watering with only plain water – remains a topic of lively debate.

In my own practice, I’ve found that flushing does seem to clear out excess nutrients, improving the smoothness and flavor of the smoke.

However, I’ve also noted that its impact on bud size and overall health varies depending on the strain and grow conditions.

Here are the viewpoints from my experience:

  • Pros: Improved taste and reduced harshness when smoking.
  • Cons: Potential for diminished yields if not managed carefully.


The last two weeks of the flowering cycle are crucial for cannabis growth, with potential weight gains making a significant difference in yield and potency.

By understanding and adapting to the specific needs of their strains, and meticulously managing environmental conditions, nutrients, and timing, growers can significantly impact their cultivation outcomes.

Tailored care, based on detailed observation and understanding of plant behavior, will yield the best results.