How To Prevent Mold When Storing Cannabis
3 min

How To Prevent Mold When Storing Cannabis

3 min
How To News

Mouldy weed is no fun. Seeing hyphae grow on a stash that took an entire season to cultivate is heart-breaking to say the least. Use these tips to prevent such situations.

There are many lingering threats present when you cultivate cannabis, from larger animals such as birds and household pets down to smaller critters such as insects and bugs. However, some of these invasive lifeforms exist on the microscopic level and can go unnoticed by the naked eye until they have proliferated to a damaging extent. Such life forms include mold, a type of fungi that forms thread-like structures known as hyphae. Under optimal conditions, these threads grow from spores that land on food sources.

Mold can be a massive hassle for growers throughout the entire process of growing a crop, from the seedling stage all the way through to bloom and harvest. Because mold has a preference for damp and wet conditions, crops cultivated within humid and warm environments are more predisposed to mold infestation. However, the dreaded threat of mold does not cease when harvest has ended. Mold can still strike, perhaps even more heartbreakingly, when cannabis crop is in storage. Imagine seeing your plants through an entire grow season, only to pull out your stash jar to find a large network of mold growing over all of your hard work.

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It is paramount to take numerous steps to avoid such a devastating situation. If you spot mold on your nugs, it’s pretty much game over at that point. Mold spores are so minute that inhaling them can cause extreme trouble in regards to health, especially in the lungs department.


How to identify Mold

Before we delve into strategies regarding mold prevention during the storage of cannabis, it’s important to learn to identify the presence of mold. When you received a new stash of weed or plan on smoking some bud that you’ve been saving for some time, it’s best to check it for signs of mold prior to ingestion.

The presence of mold can be very subtle so the use of bright lights and even a magnifying lens is advised. What you’re looking for is any signs of spores, which will manifest as tiny black dots. If these spores have already started to proliferate and the hyphae has started to run and feed off of the bud, then you may detect a fuzzy substance that can grey, yellow or brown in colour.

Sight isn’t the only way to detect mold, the sense of smell can also pick up on tell-tale signs. Whiffs of must, sweat, and even urine can signify the presence of mold.

If you detect any of these signs, then the best place for the infected bud is the garbage. Never risk your health by smoking obviously moldy weed for a short time high.


What Are The Causes Of Mold?

Mold is caused primarily by environmental conditions. Just like many plant species, fungi have environmental preferences in terms of nutrition, temperature, lighting, and air flow. It just so happens that mold prefers to go about decomposing organic matter within damp and dark settings with stagnant air. These factors need to be considered and avoided when planning both long- and short-term storage of weed.

As mold thrives in moist conditions, drying and curing weed correctly is so vital. If you rush the process and the inside of your bud is still wet and trapping moisture, you shouldn’t be surprised to see white hyphae spring forth from your precious flowers.

Mold also requires oxygen for its metabolic demands. Incorrectly stored bud will not only deteriorate in quality faster, it will also be more susceptible to mold infestation.

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How To Avoid Moldy Cannabis

The key to avoiding moldy cannabis is to minimise the environmental factors that this life form requires to both survive and thrive. Fresh flowers should be thoroughly dried immediately after harvest as the initial first step of mold prevention. Flowers can be trimmed either wet or dry.

Wet trimming is when the trimming is carried out on wet and fresh buds as soon as they are cut from the main plant. These wet buds should then be spread evenly across a drying rack to ensure complete aeration. This is an important step, as stagnant air contributes to mold growth. Using fans is also advised during this process for the same reason. Heating devices can be employed, however they are reported to increase the risk of deterioration and decrease the quality of the harvest in terms of scent, by damaging the terpene profile.

Dry trimming involves severing entire branches of buds away from the main plant and hanging them up to dry using wash lines. Hang your bundles in the same anti-mold environment as discussed above.

Once your buds are entirely dried, they need to be trimmed, and then cured to completely eliminate the mold risk. Additionally, curing will greatly enhance the flavour and smoothness of the smoke.

Weed Curing Jar

View Weed Curing Jar

To do so, place your dried buds into air tight jars and store in a cool and dark place. To begin with, you should check on them once a day to monitor for signs of mold growth. Any buds with these signs should be discarded immediately. Opening the lid also allows for air exchange to occur, where old air is removed from the jar and new fresh air enters. After a few weeks of this process your buds should be cracker dry, free of mold, and ready to blaze up.


Smoking Moldy Weed

Moldy weed only has one home: the trash. Even if you haven’t had a smoke in a while and the only stash you have left is exhibiting signs of mold, bin it! The risk is far too high. Smoking moldy weed can manifest symptoms such as vomiting, breathing issues, and headaches. Pneumonia is also a possibility due to mold spores entering the lungs.

Luke S

Written by: Luke S.
Luke S. is a journalist based in the United Kingdom, specialising in health, alternative medicine, herbs and psychedelic healing. He has written for outlets such as, Medical Daily and The Mind Unleashed, covering these and other areas.

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