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Best Mold-Resistant Cannabis Strains That Make You Want To Grow Them

Added 9 September 2023

Mold, a type of fungus, is notorious for its ability to wreak havoc. It can thrive in environments with excessive moisture and a lack of fresh air. Mold is a nightmare for everyone since it can cause respiratory issues; however, gardeners, especially cannabis growers are terrified of it. 

The presence of mold puts the health and productivity of cannabis plants at risk, potentially ruining a harvest. Once the buds catch mold, you won’t have many options other than tossing it away. Of course, some users try to smoke moldy buds, but that’s not recommended as you can encounter various health issues. 

So, if you’re looking to avoid mold, this article will focus on the top mold-resistant strains that offer immense value. Whether you grow them indoors or outdoors, you can rest assured that you’ve made the right choice. 

Read on to know more. 

What is Mold?

What is Mold?

To fully understand how damaging mold can be to cannabis plants, we must first understand how it damages the plants. 

In cannabis cultivation, mold usually refers to specific types of fungi such as Botrytis cinerea (Bud Rot), Powdery mildew, and Downy mildew. These fungi tend to flourish when humidity levels are high with poor air circulation. They reproduce by releasing spores that can easily travel through the air and settle on plants. Then, they quickly establish themselves by infiltrating the tissues of the plants, sapping the nutrients, and spreading further.

Typically, the damage caused by mold doesn’t visually look all that bad, except for a few fuzzy patches on leaves stems, and buds. However, cannabis growers know the consequences. Not only does mold affect the aroma, flavor, and potency, but it can pose serious infections and respiratory issues, as mentioned earlier. In short, it’s safe to say that mold is bad both for you and your cannabis plants. Also, focus on preventing the problem rather than trying to find a solution because it’s almost always too late when you discover a cannabis plant affected by mold. 

To combat this threat, growers resort to various solutions from improving the ventilation to regulating the humidity. While these are good approaches, breeders have taken it a step further by dedicating themselves to developing and refining strains that are resistant to mold. Sure, these strains may still be affected by mold if you cultivate them in extremely unfavorable conditions, but the chances of that happening are reduced a great deal. 

If you want to understand more about what makes these strains resistant to mold, the answer lies in their background. Many mold-resistant strains can be traced back to the humid and rainy climates of Asia and Central America. Over time, these strains, known as "landraces", have adapted to their conditions. They developed traits that allowed them to flourish despite the humidity and limited airflow, thereby acquiring inherent defenses against mold and other moisture-related issues. Breeders have cross-bred and harnessed the best traits, creating strains that have the ability to survive in harsh conditions. 

These strains often possess qualities that improve their resilience against conditions that promote the growth of mold. Typically, these plants grow buds that aren’t packed densely. Most growers prefer tight, dense buds, but they also increase the likelihood of mold. 

Also, many of these strains have more space in the internodes, which is again an undesirable characteristic for many growers but also allows for more airflow and resists mold. So, if you live in a climate that has high humidity or grow indoors with limited space and ventilation, mold-resistant strains can help. The main benefit of mold strains is their ability to not just survive, but thrive, in challenging environments. 

Mold-resistant strains produce a lot of resin that essentially serves as a layer of defense against various threats. In addition, it acts as a repository for the cannabinoids and terpenes of the plants, including CBD and THC. 

In short, you could say that these strains offer resilience, mold resistance, and potency all rolled into one package. 

How to Prevent Mold?

How to Prevent Mold?

When growing cannabis outdoors, dealing with mold can be quite challenging. However, there are ways to minimize the risk of mold infestations from the start. Here are a few tips to help you prevent mold on your cannabis plants. 

1. Choose the right seeds

One of the most important steps in preventing mold is to carefully select suitable seeds for your outdoor cultivation. Of course, the same applies to your indoor grow as well. Take the time to research and identify cannabis strains known for their resistance to mold. In particular, look for strains that are popular among growers to resist mold. 

2. Choose sativas

Typically, sativa-dominant strains tend to exhibit resistance against mold due to their physical characteristics. They grow tall with ample space between the nodes, thereby allowing air circulation around the plants and the buds as well. 

However, it's important to remember that sativas often take longer to flower which means they may be more exposed to weather conditions in regions where the growing season extends until early November. Thus, to strike a good balance, you could go for hybrids that lean more towards sativa. These hybrids tend to have slightly shorter flowering times that reduce the risk of mold while still benefiting from the characteristics of sativa genetics. Additionally, some cannabis strains are specifically bred for their resistance to mold. Therefore, read the strain descriptions carefully. 

3. Checkout the lineage

Another important factor in selecting cannabis seeds with mold resistance is examining the strain's lineage. Certain genetics are known for their levels of resistance. For example, strains with origins in the Kush, Skunk, or Haze families often display mold resistance. Similarly, offsprings of strains like White Widow or Northern Lights tend to possess qualities that fight mold.

4. Identifying Types of Mold

Understanding the types of mold that can impact cannabis plants is crucial for preventing and detecting issues. Typically, two types of mold affect cannabis:

  • Botrytis (Gray Mold): This type of mold typically spreads through the wind and usually targets older or damaged parts of the plant.
  • White Powdery Mildew (WPM): White Powdery Mildew appears as a powdery, white substance on the leaves often caused by high humidity levels.

Also, not all parts of a plant are equally affected by mold. Typically it's the buds at the top of the plant that are most susceptible to infestations. 

In addition, strains with higher indica dominance produce larger fatter buds. However, they may struggle more with managing humidity and have a tendency to absorb excess moisture.

As you can understand by now, it’s important to plan and carefully select mold-resistant strains while also considering environmental factors that contribute to mold development.

Without further ado, let’s take a look at some of the best cannabis strains that are resistant to mold. 

Best Mold-resistant Cannabis Strains

1. Northern Lights Auto

Northern lights auto

Image Credit - BigDaddyK

Northern Lights Autoflower, produced by Fastbuds, is a very easy strain to cultivate. Beginners can choose this over other strains that are more challenging. This hybrid indica-dominant not only yields impressively but is also resistant to mold. Furthermore, it provides a long-lasting effect. 

If you enjoy the sensation of being so relaxed that you are immobile or couch-locked, Northern Lights guarantees satisfaction. Sure, not everyone appreciates this sensation, but those who do will love Northern Lights. Through various techniques, the breeders have successfully enhanced the strain’s high resistance to mold while increasing its yields. This robust strain thrives in uncomfortable conditions and doesn’t even demand high maintenance. Suffice it to say that it’s a timeless classic cherished for its effects.

The buds of Northern Lights Auto display characteristics that distinguish them from others. They are light and airy with a slender shape that reminds you of an acorn. Covered in frosty trichomes, the appearance of this strain is enhanced by its protruding swollen calyxes. If you’re into making hash or other delicious concentrates, Northern Lights Auto is simply perfect for you as its abundant trichome coverage makes it an excellent choice for extracting concentrates.

Coming to the effects, just prepare to be amazed by the potency of this fantastic strain. With a THC content of 20%, you will immediately feel its effects. It delivers a strong sensation that perfectly embodies the classic indica experience. As you consume more, a deep sense of relaxation takes over, leading to a couch-lock state. Naturally, using Northern Lights Auto during the evenings will be a more pleasurable experience. 

Regarding cultivation, the plants grow about 3-4 feet, and this can be quite small or big, depending on your growing space. The yields, however, are quite substantial and you can expect at least 500 to 600 grams of premium buds per square meter. As there’s quite a bit of space between the nodes, you won’t have too many problems with pests and mold. Whether you choose to grow it indoors or outdoors, Northern Lights Auto is a great choice, especially if you deal with damp weather conditions.

2. Hyperion F1 

Hyperion F1

Image Credit - Breadandbuds

When it comes to F1 hybrids, Hyperion stands out due to its genetics derived from established inbred lines that can be traced back to amazing performers like Amnesia, Lemon, and Sin Tra Bajo. 

From the moment you encounter Hyperion, its unique scent, powerful effects, and consistent qualities will capture your attention. Its tantalizing aroma that reminds you of pine forests with earthy, spicy scents hints at its complex genetic background. 

Created by Royal Queen Seeds, Hyperion F1 shows strength and resilience, much like the titans of Greek mythology. Not only can it withstand stress including drought and cold weather to a great extent, but it’s also resistant to mold. One of the features of Hyperion F1 is its resistance to Botrytis which is pervasive and notorious for devastating entire cannabis crops. 

For growers who have experienced the heartbreak of losing their yield to mold or live in climates that are damp and encourage mold, Hyperion F1 offers a lifeline by significantly increasing the chances of a successful harvest.

Coming to the yields, Hyperion F1 provides generous rewards for buds that are uniform, attractive, and potent. The plants grow tall and strong which makes them perfect for grow tents or outdoor containers. Hyperion plants produce multiple branches if you train them well. The branches are filled with beautiful, thick buds, but not so thick that they invite mold. 

You can expect to harvest after 80-85 days, but it typically takes around 50-55 days to finish the flowering cycle. The result is a yield of resinous flowers with minimal leaf presence making trimming an easier and faster process. 

Additionally, Hyperion F1 has a terpene profile that adds to its appeal. With compounds like myrcene, ocimene, and many more that enhance your sensory experience, you can bet that the buds will be tasty and aromatic. In conclusion, you can go for Hyperion F1 if you’re looking for a strong strain that gives you bountiful yields. 

3. Durban Poison

Durban Poison

Image Credit - Dashtwenty_3

Bred by Dutch Passion, Durban Poison is a sativa that has gained popularity among growers for its genetic ability to withstand mold and ward off pests to a certain extent. Plus, it gives you great yields and has a very appealing terpene profile. What else can you ask for?!

Originating from South Africa, Durban Poison has roots that traces back to the Durban strain crossed with an undisclosed indica variety. However, it exhibits all the traits of a sativa plant with its stature reaching heights of about 6 to 9 feet when grown outdoors! The plant's robust side branches make it easy for you to cultivate it in climates susceptible to mold. 

In addition, it flowers fast and requires about 55-65 days to finish flowering. The side branches are typically hefty and covered with resinous buds from tip to toe. Thus, you can expect yields ranging between 450 to 650 grams per square meter. 

One amazing feature of Durban Poison is its invigorating and uplifting effect. It brings about a sense of happiness and energy, which are characteristics of sativa strains. Not that indica strains don’t make you happy; they do, but sativas are more cerebral and this one does the job perfectly. 

So, it won’t be wrong to say that this strain is a gem with a sativa profile. Although some phenotypes may initially display leaves resembling indicas, their true sativa dominance becomes evident during the flowering period. Expect beautiful flowers and slender sativa-style leaves.

In terms of flavor, Durban Poison has a profile with notes reminiscent of licorice and aniseed along with subtle hints of cloves. The combination creates an enjoyable experience that has made it a favorite for many cannabis enthusiasts. 

Durban Poison is known for its resilience in growing environments as it thrives both indoors and outdoors. This versatility makes it an excellent choice for most growers who can’t or don’t want to invest in expensive setups. 

The breeders have worked on its genetics over time to make it adapt to rainy climates although it hails from South Africa. When grown outdoors, it can grow to heights of over 3 meters or 9.8 feet, while indoor cultivation may require you to train it to prevent it from stretching too much. 

Now, talking about its effects, you can wait for the mind-blowing effects sativas produce. Not only will Durban Poison uplift you and make it easy to be productive throughout the day, but it also enhances your mood. 

If you're growing indoors and have height restrictions, ensure the vegetative period is short, which means it will do well with about 3-4 weeks. During the flowering period, it can double or even triple in size, so plan carefully and use techniques that reduce the height in the vegetative period. 

4. LSD


Image Credit - Mr_Bud_Grower

Prepare to embark on a journey into the world of LSD, not the hallucinogenic substance, but rather a cannabis strain that's equally mind-altering in its own right. Brought to you by Barney's Farm, this wonderful strain is popular for its lemon and earth-flavored buds brimming with THC levels that can soar up to a staggering 25% — make no mistake, LSD is not for the faint of heart. To maximize your harvest from this powerhouse, a bit of topping is recommended.

LSD is undeniably one of the best choices if you’re looking for cannabis strains that resist mold. It just doesn’t survive; instead, it thrives by growing tall and strong even in colder climates and is surprisingly easy to cultivate. The impressive ability of this strain to resist mold ensures that your hard work will be rewarded with a harvest of high-quality buds.

All in all, LSD is a well-balanced hybrid with genetics comprising 30% sativa and 70% indica. Its lineage plays a key role in its resilient nature, as it stems from the Mazar I Sharif and Skunk #1 strains.

Coming to the buds, LSD is visually captivating as it boasts of an abundance of trichomes indicating its THC content. You’ll see a mesmerizing blend of colors with buds complemented by hints of purple due to its anthocyanin content. Vibrant orange pistils add to the mix, making it even more appealing. The buds are typically chunky and dense; however, their inherent ability to resist mold will help.  

As for flavor, LSD certainly lives up to expectations. Indulge in an earthy and musky taste, with a sweet undertone that pays homage to its Skunk #1 lineage. You’ll also notice a hint of citrus after you inhale, adding to the intrigue with every puff. 

As its name suggests, LSD delivers a mind-altering high. However, don’t shy away from it because “mind-altering” in this context simply means that you’ll feel a surge of stimulation that fuels creativity. Once the cerebral high fades away, it’s followed by a body high that brings deep relaxation without causing a couch lock. Approach this strain with caution, though, as you can get high pretty quickly. 

5. Frisian Duck

Frisian Duck

Image Credit - PabloEmilioEscobarGaviria

Meet Frisian Duck, a unique cannabis strain from the crossbreeding of Frisian Dew and the Australian Duck Foot. This remarkable hybrid boasts more than just a quirky appearance; it offers robust resistance to pathogens, molds, and powdery mildew, making it an excellent choice, whether you’re experienced or a novice. 

Frisian Duck gets its name from its peculiar leaf shape, which resembles a duck's webbed feet. Seriously, people won’t even realize you’re growing cannabis at first glance. However, note that the leaves look different only during the initial stages of growth in the vegetative stage as the leaves resemble cannabis during the flowering stage. 

Beyond its unorthodox appearance, Frisian Duck is strong and pretty easy to grow. It displays a growth pattern similar to a Christmas tree. Made by Dutch Passion, the plant is almost ready to harvest after about 8-9 weeks of flowering if you provide good conditions. Outdoors, it can reach towering heights of 6.5 to 10 feet, and you can harvest it in the early to middle part of autumn. You can expect around 400 to 500 grams of beautiful buds per square meter. 

A vegetative phase of 4-6 weeks is typically sufficient for achieving sizable yields indoors. The flowering phase usually lasts for 8 to 9 weeks, which means that the entire life cycle lasts for around 12 to 15 weeks from seed to harvest. While it is possible to cultivate Frisian Duck indoors, its true potential shines if you can grow it outdoors even if the weather is more humid. However, don’t forget to train and prune the plant regularly for best results. 

The buds often turn purple and smell like a heavenly combination of fruits, citrus, and pine that’s truly unique. The effects of this sativa strain are gentle and uplifting, so you won’t feel an extremely psychoactive high. This means that you can stay functional and carry on with your daily activities. 

6. Candy Kush Auto 

Candy Kush Auto

Image Credit - Mike_Dank

If you’re looking for both sweetness and resilience in an autoflowering strain, then you can’t go wrong with Candy Kush Auto by Auto Seeds. This Indica dominant hybrid not only features a spicy caramel flavor but also exhibits impressive resistance to mold, thanks to its genetics. 

One of the qualities of Candy Kush Auto is its adaptability for all types of growers. It is also resistant to pests and adverse weather conditions, so you can cultivate it even in environments that are less than ideal. 

Moreover, its compact size which typically reaches up to 3 feet when grown indoors makes it an excellent option for growers with limited space. But, don’t be fooled by the size as it boasts a THC content of 22% and CBD content of 2% delivering a potent experience. Its rounded effects make it suitable for both recreational and medicinal purposes.

To create this delectable strain, Auto Seeds combined their Auto Pounder with California's finest kush genetics, resulting in an incredibly easy-to-grow plant that reaches full maturity in just 65 to 75 days. The ripe buds are absolutely smothered in resin with orange pistils peeking out from lime-colored buds. 

Outdoor, it's possible to harvest up to 400g/m² of high-quality weed, which delivers a numbing effect that's perfect for relaxation and unwinding. If you're looking for a strain that delivers both a resilient cultivation experience as well as a potent and soothing high, Candy Kush is perfect for you. 

7. Jacky White

Jacky White

Image Credit - McKush420

If you’re dealing with the challenge of mold in your gardens, Jacky White will impress you. Created by Paradise seeds, this strain has gained high status due to its mold resistance, making it the go-to choice for those who reside in climatic conditions with high humidity. Its genetic lineage includes the White Widow, the Jack Herer, and a hint of Northern Lights.

Jacky White boasts of a lineage of champions that are famous for their robust growth, plentiful harvests, and a refreshing, uplifting euphoria. The breeders state that it took a long while to create Jacky White. The aim was to develop a plant that did justice to its lineage, not just with the way it grew but with the effects as well. 

Like Jack Herer, Jacky White offers a high that’s not too extreme. It gives you a clear-headed creativity that makes you indulge in art. The combination of some amazing genetics makes Jacky White lean towards sativa dominance and stand out in its league.

Rich in terpenes, Jacky White is like an explosion of aroma with hints of Limonene, Pinene, and Myrcene. If you cultivate this strain indoors, the delightful scent of grapefruit fills the grow room as the cannabis plants thrive. After drying, the buds maintain their fruity essence with a distinct sweet citrus flavor that tantalizes the taste buds.

Jacky White’s robust sativa genetics allow for vigorous growth with well-shaped buds. Whether you grow it indoors or outdoors, make sure you prune it frequently. However, note that this strain performs better outdoors, like most cannabis strains. It doesn’t require high maintenance except for some bright sunlight. 

The best part of this strain is that it’s resistant to unfavorable conditions, making it a favorite among sativa enthusiasts in even the northern regions. In forgiving climates, Jacky White’s adaptability guarantees success.

Indoors, you can expect a yield of 500 grams per square meter. However, if you opt for cultivation outdoors, you’ll be rewarded with a substantial harvest of around 750 grams per plant.

Summary: Best Mold-Resistant Cannabis Strains That Make You Want To Grow Them

Mold can be extremely dangerous and ruin all your hard work. Not only does it wreak havoc on cannabis plants, but it jeopardizes your health too. Many growers take the risk of smoking moldy buds, but it’s simply not worth it. Sure, you wouldn’t feel like tossing away those buds you worked so hard for; however, you might face respiratory issues if you take the risk and smoke moldy buds. 

Typically, your cannabis plants will be affected by mold if you grow them in environments with high humidity. The most common types of mold that affect cannabis plants are Bud Rot, Powdery mildew, and Downy mildew, which thrive in conditions with excess moisture and poor air circulation. These molds can severely affect the aroma, flavor, yields, and potency of your plants. The best way to tackle mold is to prevent it in the first place. 

To avoid mold, most growers do everything possible from improving the ventilation to regulating the humidity. However, breeders have gone a step further by developing strains that inherently resist mold. Originating from the humid climates in Asia and Central America, these strains have adapted to harsh conditions over time. Breeders have harnessed specific strains of mold-resistant strains to create varieties that thrive in challenging environments.

Suffice it to say that these mold-resistant strains possess unique characteristics that enhance their resilience. Firstly, they display a lot of internodal space that prevents mold due to poor airflow, making it a boon for growers in high-humidity regions or those with limited indoor cultivation spaces. The key benefit of growing mold-resistant strains is that they flourish even in adverse conditions without compromising their potency. 

One way to avoid mold is to choose sativa strains that have space between nodes. But, you can also go for hybrids that lean more towards sativa. In addition, you can purchase strains that are developed with the aim of resisting mold. 

These strains, including Northern Lights Autoflowering, Hyperion F1, Durban Poison, LSD, Frisian Duck, Candy Kush Auto, and Jacky White, offer a diverse range of options if want protection against mold.