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Early cannabis flower showing NO signs of bud rot.

Bud Rot Prevention in the Grow Room

Ensuring Success in Hydroponic, Soil and Coco-Coir Methods of Marijuana Growing

With reports of mold and contaminants surfacing on commercially grown cannabis products in 2019, contamination is a growing concern for the home grower.

Prevention of mold growth, such as Botrytis cinerea, begins at the basic cultivation and production levels of growing cannabis. By understanding what makes mold thrive in the first place, we can enact specific measures to mitigate spore growth and spread. Bud rot thrives in environments and plants with:

  • High Relative Humidity
  • Mild Temperatures
  • Poor ventilation
  • Thick or Overgrown Foliage
  • Dense Buds
  • Weakened Immune Systems

Bud rot prevention begins with strain selection and breeding. Sativas, having adapted to the Earth’s humid equatorial regions and thus grow lighter, airy buds. As a result of the improved air flow in the bud sites, sativa dominant strains often have superior mold resistance. Indicas, meanwhile, have acclimatized and evolved in the dry mountainous regions of Asia. As such, they grow denser buds that are more susceptible to mold if introduced to a humid climate for extended periods.

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Environmental cleanliness also plays a key role in ensuring your crop remains clean though-out the production, harvest, and cure cycles. While powdery mildew has become a growing concern for growers, molds can affect the dried flower product even after harvest. Scrubbing the environment and equipment between grows helps to prevent the spread and cross-contamination of any remaining mold spores.

Finally proper storage techniques are essential to hindering mold growth. Temperature and humidity in your storage jars, tins or environments will continue to have an effect on the trichomes and compounds found within your buds.

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