powdery mildew resistant strains

Best Mold-Resistant Cannabis Strains

We’ve written quite a bit about how mold can affect your cannabis, but we thought it might be helpful to provide a list of some mold-resistant strains!

List of Mold-Resistant Cannabis Strains

Strains for Indoors

Although nothing can fix bad growing practices, some strains are more resilient towards mold than others. If you’re growing in a smaller space, or if you live in a part of the world that gets very humid, it can’t hurt to get a more mold-resistant strain!

Here are some strains that are mold-resistant and suitable to being grown indoors:

  • Moby Dick – Very easy to grow, very mold resistant, VERY potent. Smells a bit like peppermint but has also been described as having an old-school skunky flavor similar to popular sativa buds from the early 90’s. Great yields, too!
  • Sweet Tooth – In California where I live, this strain is very popular at dispensaries and often goes for very high prices! Well now you can grow it at home, too! It has a sweet flavor/taste that is reminiscent of chocolate, and the effects are powerful. As a bonus it is mold-resistant from its Hawaiian roots!

Strains For Outdoors

Although definitely not foolproof, it can’t hurt to get a more mold-resistant strain if you live in a humid environment, or if you’re an outdoor grower who gets cool wet conditions early in the fall!

Here are some strains that are mold-resistant and suitable to being grown outdoors:

  • Holland’s Hope – Designed specifically for outdoor growing (and not really suited to indoors), this strain is ready to harvest in late September or early October in the northern hemisphere. This strain has been bred for bud appearance, potency, yields, and overall weather resistance. Plants get 3-7 feet tall on average and produce a “knock-down” and “euphoric stone” effect that’s been honed for over three decades, with unique effects that are difficult to find with indoor strains. The buds are very mold-resistant and tend to get very fat. Buds often take on purple hues as they approach harvest.
  • Frisian Dew – A popular strain because about half of the plants grow buds that turn an incredible, vibrant purple (the other half of plants grow green buds but still beautiful and the effects are just as good). This strain tends to grow the highest percentage of purple buds if plants in the flowering stage are exposed to very sunny weather with many hours of direct sunlight each day, as well as if plants also get cool temperatures at night. This strain is very well suited to outdoor growing, even in northern climates, and is especially resistant to mold.

The plant in the middle with the dark purple buds is Frisian Dew

  • Jamaican Pearl – This fruity-smelling strain grows very well outdoors, and is not only mold resistant but it also has great yields. It’s known to produce a unique cerebral in-your-head effect that lasts a long time and won’t put you to sleep. Harvest Jamaican Pearl buds before the trichomes start turning amber for the best effects!

Example of a dense Jamaican Pearl bud

More resources to help you in your fight against mold!

Unfortunately your plants are much more likely to suffer from mold if you live in a humid environment or have cool, wet weather 🙁 Although no strain is fool-proof, some strains are better at preventing mold than others! Get a list of some of the most pop

7 mould resistant cannabis strains

Moulds can quickly ruin your plants during the last weeks of the flowering stage, that’s why many growers choose mould resistant cannabis strains to guarantee success. This type of genetics are resistant to high relative humidity levels, rarely developing moulds like botrytis or powdery mildew even if grown in humid climates.

If you checked the link above, you may have seen a wide rage of mould resistant varieties. Still, we want to make your decision easier for you by listing some of our favourites, genetics that – for one reason or another – have captivated us for their excellent results in humid climates. Let’s see them now!

Harvest time is coming!

Viper City OG XIII by Moxie Seeds

Moxie Seeds are known for the amazing amount of trichomes produced by their strains, a trait highly appreciated by lovers of resin extracts. Their Viper City OG XIII produces outstanding amounts of cannabinoids and terpenes, and is also highly resistant to excess relative humidity and diverse types of moulds.

This mostly Indica hybrid comes from a backross between Viper City OG and Lemon OG. It grows relatively compact but with plenty of side branches, focusing bud production on the main stem. It is also resistant to pests and nutrient imbalances, being a great choice for beginner growers.

Viper City OG XIII by Moxie Seeds

It is ready to harvest in just 60-65 days (indoors), although it is also recommended for outdoor cultivation due to its characteristics: easy to grow, resistant, compact and good yielder. This backcross produces a more lemony scent with subtle spicy notes, with a versatile effect that stimulates your mind while relaxing your body.

Moxie Seeds Viper City OG XIII info:
  • Genetics: Viper City OG (GrapeKush x Lemon OG) x Lemon OG
  • Type: Feminised seeds
  • Mostly Indica hybrid
  • Flowering: 60-65 days
  • Yield: High

Biddy Early by Serious Seeds

A true classic of the cannabis scene, Biddy Early is known for its high resistance to moulds and excess humidity. A sure bet for outdoors growers worldwide, most phenos develop awesome purple shades if temperatures drop during the bloom stage, which adds yet more interest about this genetics especially from lovers of colourful gardens.

It is a hybrid between Early Skunk and Warlock, suitable for both indoor and outdoor cultivation. It grows with Christmas tree structure, with tons of resin glands in each and every bud site. As we mentioned, it is an easy to grow cannabis strain especially appreciated by outdoor growers for its early flowering and high resistance to moulds and cold temperatures.

Biddy Early by Serious Seeds

Biddy Early is harvested after only 60 days of flowering, a very important trait for growers who – for whatever reason – need early strains, and particularly interesting for outdoor farmers. The scent and taste are sweet, reminiscent of caramel, truly delicious. Indeed, this mostly Sativa hybrid has been awarded several times at prestigious events like High Times Cannabis Cup.

Serious Seeds Biddy Early info:
  • Genetics: Early Skunk x Warlock
  • Regular and feminised seeds
  • Mostly Sativa hybrid
  • Flowering: 50-60 days
  • Indoor yield: 300-400g/m2
  • Outdoor yield: 600g/plant

Easy Haze by Philosopher Seeds

Without a doubt, this is one of our favourites in Philosopher Seeds catalogue. Formerly known as K13 Haze, this Sativa will delight all lovers of old school Haze genetics in need of plants resistant to adverse climate conditions and, of course, moulds! Apart from its natural resistance, its early flowering makes sure that you’ll harvest Easy Haze before the autumn rains come.

Coming from a Yumbolt x Kali Mist hybrid, its vigour and growth pattern makes it ideal for the SCROG technique, with long side branches and plenty of bud sites. Plants are highly resistant to stress, moulds and bad climate, which in combination with its early flowering makes it a very popular choice among novice growers who want to enjoy true Haze flavour with some tropical touch.

Easy Haze by Philosopher Seeds

Indeed, the scent and taste are reminiscent of Haze but with fruity, tropical notes (the pineapple pheno is just excellent). The effect is stimulant and cerebral, not recommended if you need to be concentrated on something else rather than enjoying the feeling! Easy Haze is also a favourite for many lovers of resin extractions, especially when dry sieved.

Philosopher Seeds Easy Haze info:
  • Genetics: Yumbolt x Kali Mist
  • Type: Feminised seeds
  • Mostly Sativa hybrid
  • Flowering: 9 weeks
  • Indoor yield: 450-600g/m2
  • Outdoor yield: 400-600g/plant

Fuel OG by Ripper Seeds

The guys at Ripper Seeds are known for the quality of their strains, especially in terms of resin production, and their Fuel OG is not an exception. Apart from that, its amazing scent and resistance to moulds delights any grower that tries it, who normally repeat after checking the outstanding results obtained!

To create Fuel OF, Ripper Seeds crossed the acclaimed New York City Diesel and their potent OG Badazz, which resulted in vigorous plants with average stretch (x2, x3), depending on phenotypes. It develops a prominent main stem where bud production is focused, being suitable for the SOG technique after removing the lower branches. It is fast (9 weeks) and yields around 500g/m2 of resinous and fragant buds with huge calyxes.

Fuel OG by Ripper Seeds

Last but not least, one of the most outstanding traits of this genetics is its complex, unique flavour. The citrus notes of NYCD – reminiscent of mandarins and grapefruits – are blended with the sweet, creamy taste of the OG parent, resulting in a true winner. The effect is intense and balanced, creative and cerebral but also body relaxing.

Ripper Seeds Fuel OG info:
  • Genetics: New York City Diesel x OG Badazz
  • Type: Feminised seeds
  • Mostly Sativa hybrid
  • Flowering: 9 weeks
  • Yield: Average/high

Barbara Bud by House of the Great Gardener

Barbara Bud has proven to be a truly versatile cannabis strain, suitable for all types of growing media and conditions, and always rewarding the grower with abundant harvests of top grade, frosty buds with an amazing terpene profile.

Barbara Bud is a cross between the famous Shiskaberry and a pure Afghani plant. It grows strong and vigorous, being resistant to stress, pests and moulds and thus highly recommendable for those who want to ensure a quality harvest. If grown indoors, it stays relatively compact and develops a prominent main cola, although it grows huge if grown outdoors with optimal conditions.

Barbara Bud by House of the Great Gardener

Apart from the mentioned traits, Barbara Bud’s early flowering is doubtless one of its strongest points, being ready in just 7 weeks! The scent and taste are reminiscent of peaches, a very distinctive flavour that you remind once you’ve tried it. Indeed, it’s been awarded many times at different events and has become a true classic for a legion of outdoor growers. You can find either feminised or regular seeds.

HOTGG Barbara Bud info:
  • Genetics: Shiskaberry x Afghani
  • Type: Feminised and regular seeds
  • Mostly Indica hybrid
  • Indoor flowering: 7 weeks
  • Yield: Average/high

Juanita la Lagrimosa by Reggae Seeds

Is it really necessary to introduce Juanita la Lagrimosa? For those of you who don’t know the story, Juanita is one of the first strains where CBD was ever found, and parent of other genetics like Cannatonic, AC/DC, Dieseltonic and many others. Apart from its high CBD content, this legendary Sativa is also highly resistant to moulds and excess humidity.

We’ve been growing Juanita over the past years and it has become a true favourite for us. You can grow it indoors, outdoors, organic, hydroponic. and you’ll always get those awesome yields and extraordinary flavour, with unique spicy and orange notes.

Juanita la Lagrimosa by Reggae Seeds

It is ready in about 9 weeks, while its balanced cannabinoid ratio offers a very pleasant effect, which you can perfectly combine with your daily tasks. Without a dubt, Juanita should be one of your first choices if you want to put Cannabidiol (CBD) in your agenda!

Reggae Seeds Juanita la Lagrimosa info:
  • Genetics: (México x Afghani) x Reina Madre (aka Queen Mother)
  • Type: Feminised seeds
  • Mostly Sativa hybrid
  • Indoor flowering: 60-65 days
  • Indoor yield: 400-600g/m2
  • Outdoor yield: 600-1000g/plant
  • High CBD content

Cole Train by Reserva Privada

Finally, and to close this list of mould resistant strains, we present you another mostly Indica hybrid, Reserva Privada’s Cole Train. As happens with other genetics on this list, Cole Train is a perfect choice for beginners: easy to grow, resistant to stress, moulds, humidity and nutrient imbalances. another sure bet for any type of grower!

Cole Train by Reserva Privada

Coming straight from the Emerald Triangle area (Humbolt county), Cole Train is a hybrid between Jasmine and Trainwreck that is ready to harvest in just 8 weeks. Yields are high, while mould resistance is truly outstanding. The flavour is complex, with spicy and floral notes.

Reserva Privada Cole Train info:
  • Genetics: Jasmine x Trainwreck
  • Type: Feminised seeds
  • Mostly Indica hybrid
  • Indoor flowering: 8 weeks
  • Indoor yield: 400-500g/m2

We hope this list will help you find your next strain to grow, especially if you live in humid areas and need mould resistant cannabis varieties in order to successfully harvest your crop.

Resistance to moulds is one of the most sough-after traits by many cannabis growers, especially those who depend on their outdoor crops to have a supp