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Ultimate Guide to Curing Cannabis in Jars: Everything You Need to Know

Ultimate Guide to Curing Cannabis in Jars: Everything You Need to Know

The 420 Gardener

Curing cannabis is an essential process that significantly impacts the quality, flavor, aroma, and potency of the final product. Proper curing can transform freshly harvested cannabis into a smooth, flavorful, and potent delight. This comprehensive guide will walk you through every step of the curing process, from the initial harvest to the final curing stage in jars, ensuring you get the best results possible.

Why Cure Cannabis?

Curing is the process of allowing harvested cannabis to age and mature, improving its quality. This process:

  • Enhances Flavor and Aroma: Proper curing preserves terpenes, the compounds responsible for the plant’s aroma and flavor.
  • Increases Potency: Curing allows cannabinoids like THC and CBD to reach their full potential.
  • Reduces Harshness: Proper curing breaks down chlorophyll and other pigments, resulting in a smoother smoke.
  • Prevents Mold and Mildew: Controlled curing conditions help to prevent the growth of harmful microorganisms.

Initial Steps: Harvesting and Drying

Before curing, cannabis must be properly harvested and dried.

  1. Harvesting:
    • Harvest your cannabis plants when the trichomes (resin glands) are milky white with some amber hues. This indicates peak potency.
    • Use clean, sharp scissors to cut the branches. Handle the buds gently to avoid damaging the trichomes.
  2. Trimming:
    • Wet Trimming: Trim the leaves immediately after harvest. This method is quicker and can prevent mold.
    • Dry Trimming: Hang the branches to dry first, then trim the leaves. This method can enhance flavor and aroma but requires more space and time.
  3. Drying:
    • Hang the trimmed branches upside down in a dark, well-ventilated room with a temperature of 60-70°F (15-21°C) and a humidity level of 45-55%.
    • Drying typically takes 7-10 days. The buds are ready when the smaller stems snap rather than bend.

The Curing Process

Once your buds are dried, it’s time to begin the curing process.

  1. Choosing the Right Jars:
    • Use glass jars with airtight seals, such as wide-mouth mason jars. Avoid plastic containers as they can impart unwanted flavors and potentially introduce contaminants.
  2. Filling the Jars:
    • Fill the jars about 75% full, leaving enough room for air circulation. Overfilling can lead to moisture buildup and mold growth.
  3. Initial Burping:
    • For the first week, open the jars daily for 10-15 minutes to release moisture and allow fresh air to circulate. This process is known as “burping” and helps prevent mold.
  4. Monitoring Humidity:
    • Use hygrometers to monitor the humidity levels inside the jars. The ideal humidity range for curing is 55-65%.
    • If humidity levels are too high, leave the jars open for a longer period during burping or remove some buds temporarily.
    • If humidity levels are too low, consider adding a humidity pack designed for cannabis storage.
  5. Long-Term Curing:
    • After the first week, reduce the frequency of burping to once every few days.
    • Continue this process for 2-4 weeks. Some connoisseurs prefer curing for several months to achieve the best results.
  6. Storing the Cured Cannabis:
    • Once the curing process is complete, store your cannabis in a cool, dark place to preserve its quality.
    • Keep the jars sealed to maintain the ideal humidity level and prevent degradation from light and air exposure.

Common Mistakes and How to Avoid Them

  1. Rushing the Process:
    • Patience is key. Rushing the curing process can result in harsh, less flavorful cannabis. Take your time to ensure optimal results.
  2. Ignoring Humidity Levels:
    • Neglecting to monitor and adjust humidity levels can lead to mold growth or overly dry buds. Use hygrometers and humidity packs to maintain the ideal environment.
  3. Using Improper Containers:
    • Avoid using plastic or metal containers for curing. Stick to glass jars with airtight seals to prevent contamination and preserve quality.
  4. Overpacking the Jars:
    • Overpacking can hinder air circulation and increase the risk of mold. Always leave some space in the jars for proper air exchange.

Advanced Tips for Mastering the Cure

  1. Using Humidity Packs

    Humidity control packs are essential for maintaining the perfect humidity level inside your jars during the curing process. Brands like Boveda offer packs in various RH levels, with 62% being ideal for cannabis curing. For those seeking a salt-free option, Island Herbz provides high-quality humidity packs that are gentle on your buds, ensuring optimal preservation without the use of salts.

    Flavor Enhancement:

    • Some growers add flavor enhancers like orange peels or herbs to the jars during curing. However, this can introduce moisture and mold risks. If you try this method, monitor humidity levels closely.
  2. Vacuum Sealing:
    • For long-term storage, consider vacuum sealing your cured buds. This method removes air and helps preserve freshness and potency for extended periods.
  3. Regular Inspections:
    • Periodically check your jars for any signs of mold or mildew. If detected, remove the affected buds immediately to prevent the spread.
  4. Staggered Harvest:
    • If you have a large crop, consider staggering the harvest and curing process. This allows for more manageable batches and reduces the risk of mold due to overcrowding.


Curing cannabis is an art that requires patience, attention to detail, and a thorough understanding of the process. By following these steps and tips, you can ensure that your cannabis is of the highest quality, offering a smooth, flavorful, and potent experience. Remember, the key to successful curing lies in proper drying, monitoring humidity levels, and allowing enough time for the buds to mature fully. Happy curing!

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