Mold, that uninvited party crasher that creeps up when you least expect it and wreaks havoc on your grow. But fear not, our list of the best mold resistant strains are here to save the day and your harvest. They have been specially bred for robustness and to thrive in humid conditions where mold is most likely to strike.
The 10 best mold resistant strains
Below is our pick of the ten best mold resistant strains for you to peruse.
1. Afgoo
15-18%
400-500 G/SM
8-10 WEEKS
100-180 CM
Afgoo is an Indica dominant hybrid created by crossing a landrace strain of Afghan and a Maui Haze strain.
This robust genetic foundation blesses her with a formidable defense against mold attacks, providing a strong shield of protection for her cherished blooms and the entire crop.
She’s quite the trooper when it comes to handling excess humidity – an environmental culprit that often leads to the formation of mold. She is tough and can adapt to the surroundings to survive.
Afgoo is the perfect variety for beginners. The smell of sweet herbal notes followed by a Sativa-like head high will make this weed a hit among newbies and seasoned smoke enthusiasts. As a mellow strain that won’t get you “frazzled”, Afgoo is an excellent option for those seeking a more carefree evening.
2. Blue Cheese
15-18%
400-500 G/SM
8-10 WEEKS
100-180 CM
The immaculate genetics of Blue Cheese are derived from powerful pedigree parent strains: UK Cheese and Dutch Blueberry. She comes well-prepared for damp and stagnant environments, boasting a sturdy defense mechanism against mold spores, which makes it tough for these pesky intruders to gain any ground.
Blue Cheese produces sweet and savory-flavored bud with 80% Indica dominance, making her a favorite among both recreational users and medical patients.
She is potent, sweet, and fruity while also providing a pleasant sense of relaxation without drowsiness.
At the first stoke, you might be fooled into thinking this is a Sativa strain, but Blue Cheese rides the line between Indica and Sativa. She packs a potent punch that settles down into a solid body high that promotes relaxation. The delicious taste of blueberries with a hint of sharp cheddar cheese characterizes this strain’s flavor profile, offering a unique experience with every hit.
3. Super Silver Haze
19-22%
500-600 G/SM
12-14 WEEKS
180-220 CM
Being bred from crossing Northern Lights (Afghani x Thai), Haze, and Skunk, Super Silver Haze has a lineage of cannabis legends that gives her strong mold resistant properties.
A three-time High Times Cannabis Cup winner, this sticky Sativa hybrid with a long-lasting energetic body effect is one of the best mold resistant strains you can grow in hot climates.
Super Silver Haze is known for her uplifting, happy, euphoric quality. This is a genuinely fantastic strain that leaves you feeling happy while still being productive and functional.
Super Silver Haze grows well indoors or outdoors.
Indoor growers looking to take their cultivation to the next level will appreciate her superb branching properties when used in SOG and SCROG setups. Outdoors, she thrives in equatorial and tropical regions.
4. Colombian Gold
19-22%
500-600 G/SM
14 WEEKS
220 CM
For generations, people from the Santa Marta mountain range in Colombia have been growing cannabis and through constant crossbreeding to enhance its medicinal qualities, they have successfully developed some of the most genetically uncontaminated strains available today.
Having been bred from a fusion of landraces strains in the area, Colombian Gold isn’t afraid of a little rain or humidity! This cannabis strain is so mold-resistant, you might catch her singing in the rain. She deserves a top spot for growers in humid regions who want to avoid moldy buds.
The unique Sativa variety is an energetic daytime hybrid that raises your spirits and keeps you focused on love and happiness, thanks to her high THC content of up to 20 percent. Colombian Gold strain is ideal for those who want to experience consistent muscle relaxation and a mild to moderate mood boost.
5. Jamaican Pearl
15-20%
500-700 G/SM
8-10 WEEKS
200+ CM
This mold resistant strain is the culmination of Sensi seeds’ quest to find an old-world Sativa that could grow in northern climates. It’s one of their most Sativa dominant hybrids, a cross between a Jamaican cannabis strain called Marley’s Collie and an Early Pearl variety.
Her impressive mold-resistant attribute, inherited from one of the best Caribbean Sativa genetics, puts growers at ease knowing that she’s more than capable to hold her own against this threat. This is an excellent choice for growers in cooler climates as she thrives in these conditions.
Jamaican Pearl produces an exotic high that will leave you feeling calm and relaxed. Tropical fruit aromas with a hint of pineapple make for a refreshing smoke.
6. Northern Lights #5 x Haze
18-22%
500-700 G/SM
10-14 WEEKS
220+ CM
Two classic Sativa-Indica hybrids are united in the creation of this strain, designed initially to yield intense tropical highs with a slow-onset body stone. She’s the spectacular result of breeding a North American Sativa to an award-winning Afghani making Northern Lights #5 x Haze one of the best mold resistant strains to grow.
Her bliss is soaring, powerful, and long-lasting, but not so intense that it leaves you on the couch. Northern Lights 5 x Haze is a relaxing, creative smoke. You can also expect an invigorating high that will last a long time.
7. Thai Auto
22%
500-700 G/SM
9-11 WEEKS
200+ CM
Being a pure Sativa marijuana strain that was bred from the original Thai landrace cannabis, Thai Auto’s mold resistant trait is a game changer for cannabis growers! This strain can withstand high humidity levels without succumbing to mold, ensuring a bountiful harvest. Thanks to Thai Auto, cultivators can breathe easy knowing that their crop is protected from pesky mold infestations.
It is believed that when soldiers returned home from the Vietnam War, they brought this weed with them. It quickly became known as “Thai sticks,” owing to the bamboo stalks that marijuana was wrapped in when imported into the United States. You’ll love the taste of this strain. It begins with a fruity and sweet sensation that evolves into a sour and piney aftertaste. The flavor is just as smooth as the scent.
After inhaling the thick smoke of Thai Auto, you’ll feel relaxed and uplifted. The high is clear-headed and puts you in a good mood, so it’s perfect for completing various tasks on the go.
8. Durban Poison
19-22%
500-600 G/SM
12-14 WEEKS
180-220 CM
Durban Poison’s mold resistant trait is a godsend for cultivators who want to avoid moldy buds. This hybrid strain, bred from Durban Poison and other cannabis strains, can thrive in high humidity environments without falling victim to mold growth. Durban Poison is a must-have for any grower looking for a reliable mold resistant strain.
It has psychedelic properties that will leave you feeling euphoric.
With its complex Sativa effects, Durban Poison can provide an uplifting experience as well. Its THC content is more than 20%, which results in a trancelike state of mind that can be pretty mesmerizing.
This South African strain is an excellent choice for novice and expert growers alike. It’s easy to grow, grows well in soil and hydroponic setups, and requires little maintenance. Durban Poison produces up to 350g/m² when grown outdoors; while indoors, that number shoots as high as 550 grams.
Durban Poison is a Sativa dominant cannabis strain (60 % Sativa) that exudes incredible euphoric energy. It’s perfect if you are into the uplifting effects of sativas.
9. Buddha
15-18%
400-500 G/SM
12-14 WEEKS
180-220 CM
All hail the mighty Buddha strain! Named after the famous philosopher, Buddha’s pure sativa genetics make it one of the best mold resistant strains. Its remarkable resilience against mold offers growers peace of mind, ensuring a thriving, lush harvest even in the face of tropical rain.
Its incredible cerebral high will put a smile on your face and leave you with a positive outlook on life. Buddha’s good genes make it great for cross-breeding, especially for those looking to create their own hybrid strains. You decide what to breed with Buddha Regular seeds, allowing for a diverse cannabis growing experience.
Buddha provides a significant high and an abundance of happy vibes. It is highly recommended for those who prefer to keep things mellow. It rewards your good growing with abundant yields and a plethora of spice.
10. Shaman
18-22%
500-600 G/SM
8-10 WEEKS
100-180 CM
Shaman was produced in the mid-1980s. As an F1 hybrid, Shaman is a stellar blend of Purple #1 and Early Skunk, boasting exceptional genetics. Its remarkable mold fighting ability is a boon for growers, providing a sturdy defense that keeps their plants safe.
The mold resistant strain produces a distinctive and elegant plant, growing with evident Sativa characteristics such as long intermodal distance between the large buds. It has a strong Sativa influence, which makes it ideal for a sunny outdoor location or greenhouse. Shaman is an easy-to-grow variety with high yields of good quality ganja.
Shaman is a great recreational strain with energetic and trippy effects, an upbeat high, and sugary taste.
Why grow mold resistant strains?
So… what is mold?
Mold is a group of microscopic fungi, it thrives in damp and humid environments, often appearing as fuzzy patches on various surfaces. Mold often shows up when cannabis plants are near maturity and can rapidly spread and infects your plants. These microscopic mischief-makers will leave behind a weakened, unhealthy crop, causing headaches for growers far and wide.
Why is mold bad for cannabis growing?
Once established, mold spreads quickly and is difficult to manage, particularly in environments with high humidity. Botrytis mold (also known as bud rot) infection can spread so fast it can destroy a harvest within weeks if left unchecked.
Mold effectively takes over whatever portions it infects and they begin to rot and deteriorate. The often leads to growers having to throw away entire or large portions of a grow. And even if you manage to salvage some plants any that have been infected will likely suffer from reduced yields and poor quality and low potency bud.
If you do end up managing to salvage some bud, you need to be very careful that it does not contain any mold. If smoked mold can be a hazard to your health, especially for anyone that suffers from asthma or any respiratory issues.
Why use mold resistant strains?
Increased Yield: Mold-resistant strains are robust and are able to resist fungal and bacterial infections that can reduce yields. By choosing a mold resistant strain, you can ensure that your plants will remain healthy and produce bigger yields.
Improved Quality: When plants are infected with mold, it can negatively impact the quality of the bud. By avoiding mold in your grow the overall bud will be more potent, better tasting and all around better quality.
Lower Costs: Treating mold and mildew can be costly and time consuming. By growing with mold-resistant strains, you can reduce the need for expensive treatment and save time and money.
Mold resistant strains have built in shields, making it harder for mold to infiltrate and infect your plants. By choosing these more robust plants, you’re not only reducing the risk of mold invasion, but you’re also saving time and effort of constant surveillance.
You should also take steps to prevent mold growth, such as setting correct temperature and humidity for cannabis grow room, improving air circulation, and using proper sanitation practices.
What makes some cannabis strains mold resistant?
Breeders have created mold resistant strains through a process of selective breeding. They start by identifying plants with a natural resistance to mold and mildew, and then breed them with other resistant plants over generations. They then cherry-pick the strongest offspring, eventually creating a strain with even greater mold resistance. Over time, this selective breeding process has resulted in strains that are highly resistant to mold and other pathogens.
Landrace Sativa and why they are the most mold resistant strains
Landrace strains are species of cannabis that grow in the wild and have naturally adapted to their native environments over centuries, staying true to their roots (pun intended!). Landrace strains haven’t been mixed or mingled with other varieties like most modern day hybrids, which makes them genetically pure and well suited to their homeland.
Each landrace strain has distinct characteristics that reflect the particular climate, soil, and environment of their region. These strains serve as the building blocks for breeders, who have used them to create the array of hybrids we enjoy today.
Landrace Sativas are native to Central and South America, Asia, and Africa, all very warm, humid parts of the world. Their tall long structures allow for air to flow more freely around the leaves and buds of the plant which reduces the risk of condensation settling and becoming stagnant . By cross-pollinating these landraces Sativas with Indicas and Ruderalis strains, breeders have been able to create a range of hybrids that are more resistant to mold, bugs, and other risks that come with a hot, humid climates.
