USA DAYS — Up to 50% off USA strains Buy Now

By Luke Sumpter

Mould is a multicellular fungus that usually decomposes dead organic matter, yet can also affect living organisms, such as various plants and animals. Mould can be a big issue for growers, especially those dealing with damp conditions with little to no airflow. Mould usually takes the form of a white fuzz present on leaves and flowers, and is a devastating sight for growers who may have been halfway through cultivating an otherwise perfectly healthy crop.

There are several means of preventing mould formation, with genetics playing an important role. Some strains have developed the ability to resist mould to a certain extent, and here are the top 5.


Stress Killer Automatic is a hardy and resilient specimen that stems from parent strains Lemon Shining Silver Haze, Juanita la Lagrimosa and Ruderalis. This powerful genetic base has gifted this variety a potent defence against mould invasion, keeping her precious flowers safe and ensuring high levels of protection over a crop. She’s also highly tolerant to excess humidity, an environmental factor that contributes toward the formation of mould.

Stress Killer Automatic

Stress Killer Automatic is a sativa-dominant hybrid strain that offers high amounts of CBD, making her a fine choice for users seeking high doses of the therapeutic cannabinoid without getting too elevated in the process. Her effects are clear, pleasant, and allow the user to continue with their daily tasks without any mental obstruction.

This variety can be grown successfully in both indoor and outdoor environments. Indoor plants burst from seed to harvest in as little as 60–65 days and provide significant yields of 400–500g/m². Outdoor plants take advantage of more space to spread their roots and are capable of producing rewarding yields of 600–1000g/plant.

Stress Killer Automatic

Stress Killer Automatic

Genetic background Lemon Shining Silver Haze x Juanita la Lagrimosa x Ruderalis
Yield indoor 450 - 5002
Height indoor 90 – 140
Flowering time 7 - 8 weeks
THC strength THC: 11%(aprox.) / CBD: High
Blend 60% Sativa, 30% Indica, 10% Ruderalis
Yield outdoor 110 - 160 g/per plant (dried)
Height outdoor 120 – 160 cm
Harvest time 10–11 weeks after planting
Effect Clear High, Mental Focused

Buy Stress Killer Automatic

            2. SHINING SILVER HAZE

Shining Silver Haze is an award-winning variety that has been a hit within the cannabis world since the ‘90s. Her immaculate genetics stem from powerful pedigree parent strains Skunk, Northern Lights, and Haze. This superstar lineup formed a hybrid strain known for intense psychoactive effects that range from cerebral and stimulating to stoning and relaxing. These flowers contain a high THC content that induces a stress-busting state of euphoria.

Shining Silver Haze

Shining Silver Haze is well-equipped against humid and stagnant conditions, with a powerful line of defence against mould cells, making it hard for them to get a foothold. She produces large, fat buds that can take a toll on the lanky stature of this strain, often requiring growers to stake her for added structural support.

This strain has a preference for indoor growth and greenhouses, where she can pump out a good yield of 450–550g/m². Plants still perform well outdoors and offer their grower a harvest of approximately 550g/plant. Indoors, Shining Silver Haze has a flowering time of 9–11 weeks. Outdoor plants will be ready for harvesting in late October.

Shining Silver Haze

Shining Silver Haze Feminized

Genetic background Haze x (Skunk x Northern Light)
Yield indoor 600 - 650 g/m2
Height indoor 80 - 120 cm
Flowering time 9 - 11 weeks
THC strength THC: 21% (aprox.) / CBD: Medium
Blend 75% Sativa, 25% Indica
Yield outdoor 600 - 650 g/per plant (dried)
Height outdoor 180 - 220 cm
Harvest time Late October
Effect Very high

Buy Shining Silver Haze


            3. POWER FLOWER

Power Flower is derived from original South African dagga genetics and is renowned for her social, buzzy, and talkative high, despite her indica dominance. She is the result of crossbreeding parent strains Original Power Plant and White Widow, a pairing that passed on powerful mould-fighting qualities.

Power Flower

Smoking a bowl or joint loaded with this strain with leave a pleasant taste of pine on the taste buds. Power Flower is recognised as a competitive cash crop due to her fast flowering times and massive buds that form an enormous towering cola when left untopped.

Power Flower performs well in grow rooms and tents, and outdoors within garden beds and pots. She grows to a stealthy height of 80–120cm, making her very easy to conceal and cultivate in small spaces. For her small size, she puts out an impressive yield of 500–550g/m², ready for plucking after a flowering time of 8-9 weeks.

Power Flower

Power Flower Royal Queen Seeds

Genetic background South African Sativas
Yield indoor 500 - 550 g/m2
Height indoor 80 - 120 cm
Flowering time 8 - 9 weeks
THC strength THC: 19% (aprox.) / CBD: Low
Blend 88% Sativa, 12% Indica
Yield outdoor 500 - 550 g/per plant (dried)
Height outdoor 160 - 200 cm
Harvest time October
Effect Strong up high

Buy Power Flower

            4. ROYAL MOBY

Royal Moby is very resilient to mould, making her a strain of choice for growers in humid regions of the world. As well as being gifted in the defence department, this potent and tasty strain offers pungent scents of peppermint and intense flavours of Skunk, cedar wood, citrus, flowers, Haze, lemon, and pine. This diverse assortment of flavours complements the relaxing, stoning, and meditative high. A THC content of around 21% creates a high that comes on instantly and lingers for hours.

Royal Moby

Royal Moby is the offspring of two famous strains—Haze and White Widow. This pairing produced a hybrid that grows to the enormous height of 3.5m outdoors, and can pump out a staggering yield of 700g per plant, roughly speaking. These traits make her a favourite among growers looking for a massive personal stash. Outdoor plants will be ready for harvesting in October. Indoor plants will produce yields of 650g/m², delivered after a flowering time of 60–70 days.

Royal Moby

Royal Moby Royal Queen Seeds

Genetic background Haze x White Widow
Yield indoor 500 - 550 g/m2
Height indoor 80 - 140 cm
Flowering time 9 - 10 weeks
THC strength THC: 21% (aprox.) / CBD: Low
Blend 65% Sativa, 35% Indica
Yield outdoor 500 - 550 g/per plant (dried)
Height outdoor 200 - 300 cm
Harvest time Late October
Effect A combination of stoned + high

Buy Royal Moby

            5. NORTHERN LIGHT

Northern Light is a well-known name within the cannabis world, a strain famous for her indica purity and intense high. A huge bonus to growing this strain is her high resistance to mould, a trait that can put growers at ease during the flowering stage, knowing that she is quite capable of withstanding this threat.

Northern Light

Northern Light produces a high level of THC alongside a medium level of CBD, making her high stoning, relaxing, and euphoric. These qualities make her an ideal smoke for the evening hours when unwinding after a day of work. Each toke of this strain is accompanied by flavours of sweetness, fruit, and spices.

Indoor plants grow to heights of 100–160cm and put out yields of around 500–550g/m². Outdoor plants grow taller to heights of 180–220cm, producing good yields of up to 625g per plant. Northern Light has a flowering time of 7–8 weeks, and outdoor plants will be ready for the axe in late September.

Northern Light

Northern Light

Genetic background Northern Light S1
Yield indoor 500 - 550 gr/m2
Height indoor 100 - 160 cm
Flowering time 7 - 8 weeks
THC strength THC: 18% (aprox.) / CBD: Medium
Blend 0% Sativa, 100% Indica, 0% Ruderalis
Yield outdoor 575 - 625 g/per plant (dried)
Height outdoor 180 - 220 cm
Harvest time Late September
Effect A combination of stoned + high

Buy Northern Light

Are you aged 18 or over?

The content on is only suitable for adults and is reserved for those of legal age.

Ensure you are aware of the laws of your country.

By clicking ENTER, you confirm
you are
18 years or older