How to Spot Mouldy Weed and What to Do About It

When you’re buying premium cannabis, quality and safety are everything. Whether you’re a casual user or a connoisseur, knowing how to identify mouldy weed is essential. Consuming weed mould isn’t just unpleasant—it can be dangerous. In this guide from Get Kush, your trusted Canadian online cannabis dispensary, we’ll show you how to spot the signs of mouldy cannabis, how to prevent it, and what to do if you discover your weed has gone bad.

What Is Mouldy Weed?

Mouldy weed is cannabis that has developed fungal contamination due to improper storage, high humidity, or poor curing. Mould spores thrive in moist environments, and if your cannabis wasn’t cured properly or has been exposed to moisture, mould can grow and spread quickly.

Common types of mould found on weed include:

Aspergillus: A dangerous mould that can cause lung infections.
Botrytis (bud rot): A grayish mould that causes buds to decay from the inside.
Powdery mildew: A white, flour-like fungus that spreads across the surface of the buds.

Does Weed Go Bad?

Yes—weed does go bad, especially if not stored correctly. Over time, cannabis loses potency, aroma, flavour, and quality. Mould contamination accelerates this process and makes the product unsafe for consumption.

Even if cannabis doesn’t get mouldy, improperly stored weed can:

Lose THC potency
Dry out and become harsh to smoke
Develop off-smells or a stale taste

How to Spot Mould on Weed: Key Signs to Look For

Identifying mouldy weed early can save you from health risks. Here’s what to look out for:

1. Visual Signs of Mould

Use a magnifying glass or the naked eye to examine your buds closely. Watch for:

White or gray fuzz: Often mistaken for trichomes, mould appears fuzzier and irregular.
Black or green spots: Discoloration in patches can be a sign of mould growth.
Powdery film: Especially white and uneven—this is often powdery mildew.

2. Unusual Smell

Fresh weed should smell earthy, fruity, citrusy, or piney, depending on the strain. Mouldy weed, however, often smells:

Musty or like mildew
Similar to wet grass or hay
Like a basement or sour laundry

If your cannabis has a stale or off-putting odor, don’t risk smoking it.

3. Texture and Feel

Healthy cannabis should feel slightly sticky but not wet. Mouldy weed might feel:

Damp or moist
Crumbly and overly dry on the outside, yet wet inside
Sticky in a weird, slimy way

4. Taste When Smoked or Vaped

If you missed the earlier signs and end up using mouldy weed, you’ll know immediately by:

A harsh or acrid taste
Instant throat irritation
Persistent coughing

If this happens—stop immediately.

Is Mouldy Weed Dangerous?

Yes, consuming weed mould can be harmful, especially for people with:

Asthma
Allergies
Weak immune systems
Respiratory issues

Even healthy individuals can experience:

Coughing fits
Headaches
Nausea
Lung infections (in extreme cases)

If you think you’ve inhaled mould spores, monitor your symptoms and contact a healthcare professional if you feel unwell.

What Causes Mould to Grow on Cannabis?

Several factors can lead to mouldy weed. These include:

1. Improper Curing of Cannabis

If buds aren’t dried and cured properly after harvest, internal moisture can stay trapped, providing a breeding ground for mould.

2. Poor Storage Conditions

Leaving cannabis exposed to humidity or air causes mould to develop. Common storage mistakes include:

Using plastic bags instead of airtight containers
Keeping weed in warm or humid areas
Storing weed in the fridge, which leads to condensation

3. Cross-Contamination

Weed stored near mouldy products or in unsanitary environments can pick up spores from other sources.

How to Store Weed Properly to Prevent Mould

Keeping your cannabis fresh and safe starts with proper storage. Here’s how to store weed the right way:

Use Airtight Containers

Glass jars with tight-sealing lids (like mason jars) are ideal.
Avoid plastic bags or containers that can let in air or static.

Store in a Cool, Dark Place

Ideal temperature: 15–21°C (59–70°F)
Avoid direct sunlight and heat, which degrade cannabinoids and promote moisture.

Control Humidity

Use humidity packs (like Boveda) to keep the humidity around 55–62%.
Avoid environments with high humidity over 65%.

Don’t Store Weed in the Fridge or Freezer

Fridges fluctuate in temperature and can cause condensation.
Freezing can damage trichomes and introduce moisture when thawed.

The Role of Curing Cannabis in Mould Prevention

Curing cannabis is the process of slowly drying and aging harvested buds. Done right, it prevents mould by:

Reducing internal moisture
Enhancing aroma, flavour, and potency
Increasing shelf life

If cannabis is poorly cured, moisture stays trapped in the core of the bud, creating ideal conditions for mould—especially when sealed in jars.

Quality Canadian online dispensaries like Get Kush source properly cured weed to ensure you get mould-free, premium cannabis every time.

What to Do If You Find Mouldy Weed

If you suspect your weed is mouldy, here’s what to do:

1. Don’t Smoke It

Resist the urge to “test a little.” Even a small amount of mould can be harmful.

2. Dispose of It Safely

Seal it in a bag and toss it in the trash.
Don’t compost it or flush it, as mould spores can spread.

3. Contact the Source

If you bought the weed from a dispensary:

Reach out to customer service.
Provide pictures or evidence.
Reputable sources (like Get Kush) will often provide a refund or replacement.

How to Avoid Buying Mouldy Weed in the Future

Shop Reputable Online Dispensaries

Choose trusted cannabis retailers that guarantee quality and proper storage. At Get Kush, all our products are:

Lab-tested
Professionally packaged
Stored in optimal conditions

Check Product Reviews

Before buying a strain or product, read reviews and see what others say about freshness and appearance.

Buy in Moderation

Only purchase the amount you’ll use in a reasonable time. Long-term storage increases the risk of degradation or mould if not done properly.

Can You Salvage Mouldy Weed?

Unfortunately, no. Some forums suggest baking or vaping to kill mould, but:

Heat won’t remove mycotoxins, which are dangerous byproducts of mould.
It’s not worth the health risk.

When in doubt, throw it out.

Final Thoughts: Mouldy Weed Is a No-Go—Here’s How to Stay Safe

Mouldy weed isn’t just gross—it can be hazardous. Luckily, with a bit of know-how, you can avoid it entirely. Here’s a quick recap:

Always inspect your buds visually and with your nose.
Store cannabis in a cool, dark, airtight environment.
Shop trusted retailers like Get Kush to guarantee quality.
If in doubt, don’t smoke it—your health isn’t worth the risk.

Looking for fresh, premium, mould-free cannabis in Canada?
👉 Buy weed online at Get Kush—lab-tested, cured to perfection, and delivered discreetly to your door.

FAQs About Mouldy Weed

How common is mould in weed?

It’s more common in black market weed or improperly stored cannabis. Legal dispensaries like Get Kush implement quality controls to prevent mould.

Can you get sick from mouldy weed?

Yes—especially if you have asthma, allergies, or a compromised immune system. Even healthy individuals can feel ill from smoking mould.

How long does weed last if stored properly?

Properly stored cannabis can last 6 months to a year without significant loss of quality or potency.

Does curing cannabis remove mould?

Curing doesn’t remove existing mould, but it prevents mould growth when done correctly by reducing internal moisture.

Why Buy from Get Kush?

At Get Kush, we prioritize:

✅ Expert-curated strains
✅ Proper curing and storage
✅ Vacuum-sealed packaging
✅ Fast, discreet shipping across Canada

When you shop with us, you can rest easy knowing your weed is mould-free, high-quality, and safe to consume.

👉 Visit Get Kush today and explore our latest strains

REFERENCE:

Adrienne Santos-L., Medically reviewed by Deborah W., Ph.D., MSN. (2020, March 31). PSA: Check Your Cannabis for Mold. Available at: https://www.healthline.com/health/moldy-weed