The biggest thing you want to focus on is getting the humidity under 50% (most important!) and giving plants plenty of air movement.
Keep an extremely close eye on your longest, fattest and most dense colas. Almost like a cruel joke, bud rot usually attacks your biggest colas 🙁
Bud rot can show up in many ways. For example, this cola here responded to bud rot by turning purple and mushy. with leaves that becoming crispy and dying. This is what the grower came back to find after a few days of rain.
How to Stop Bud Rot from Spreading
Any part of the cannabis plant affected by bud rot should be discarded immediately! This helps prevent further infection and all buds touched by this toxic fungus should never be smoked or used.
As soon as even one part of a single bud starts showing signs of grey mold, the rot can spread to the rest of the cola and then to other buds on the plant. If triggering conditions (lack of airflow, wetness) have not improved, a single point of infection can quickly ruin the harvest of an entire plant.
Extreme Case of Cannabis Bud Rot 🙁
Most common ways Bud rot fungus spores get to plants
Here’s how to fix the environment:
Bud rot is a mold that develops in the thickest parts of cannabis buds. Read for more information on how to prevent and solve bud rot before spreading!
Lastly, protecting your plant from excessive moisture is key in the battle against bud rot. Watering plants in the morning helps prevent humidity in the garden when the sun goes down or when lights turn off later in the day. Additionally, protecting plants from rain by growing in a greenhouse or indoors lends a huge advantage against bud rot. If your outdoor garden was just hit by heavy rainfall, it’s not uncommon for gardeners to use leaf blowers to help wick the water off of the plants. A simpler method is to walk through your garden and lightly shake each plant to remove the standing water.
As you harvest your crop, check your plantsвЂ™ colas for rot. Again, if you find mold, discard the infected area while saving what is unaffected.
Harvest after a dry spell. If growing outside, it’s ideal to harvest when it hasnвЂ™t rained for a few days so that the buds have a lower moisture content.
Efforts to prevent bud rot do not stop once the bud has been harvested. Mold can also occur as the buds dry and cure. Here are a few tips to keep in mind.
There are multiple types of mold that can infect your plant. The two most common are bud rot (botrytis cinerea) and powdery mildew. This tutorial will focus on dealing with bud rot, but if your current bane is powdery mildew, learnВ how to eradicate that and other plagues in this article.
The best way to prevent bud rot is to understand what makes the mold thrive in the first place. Bud rot thrives in environments and plants with:
Bud rot is a type of mold that develops in the dense cores of the cannabis buds. The infection starts on the stem inside of the bud and then spreads outwards, making it very difficult to detect in its early stages. After its onset, bud rot breaks down the surrounding bud and spreads out in all directions. Soon it produces its own spores that can then spread to other areas of the plant or garden. The rot will first appear white and wispy and will turn grey and black as the bud turns to a mushy, slimy consistency.
Adjust drying speed if necessary. Generally speaking, drying is not something you want to rush as THCA is still converting and the chlorophyll is still breaking down. A slow drying process is generally associated with a tastier and smoother smoke. However, if you’re finding mold in your harvested cannabis, speeding up the drying time by increasing temperature and decreasing humidity could save the rest of your crop from mold growth.
Bud rot prevention begins with the type of strain you select for your garden. Sativas, having adapted to humid equatorial regions, tend to grow light, wispy, airy buds. With improved air flow in the buds, sativas often have superior mold resistance. Indicas, on the other hand, adapted to the dry mountainous regions of Asia, and grow denser buds that are more susceptible to mold if introduced to a humid climate. If humidity control is a concern, consider growing a plant that expresses itself with more airy, mold-resistant buds.
Learn all about bud rot (botrytis cinerea), one of the most common types of mold found on cannabis plants, including how to identify and prevent it.