8 Resilient Mold Resistant Cannabis Strains for Wet Climates

Most mold resistant cannabis strains list—the types of marijuana that best resist bud rot, Botrytis, and powdery mildew. For sale as regular and feminized seeds.

Mold and mildew resistant strains are crucial to success when growing cannabis in humid climates. The best mold resistant strains have the ability to produce high-quality marijuana buds in wet conditions while ensuring harvest comes free of mold.

Without these resilient genetics, growers could easily lose crops to mold damage. Thankfully, the best mold resistant strain seeds are available to purchase practically anywhere you are in the world.

wet climate mold resistant cannabis cultivation

Why Mold Resistant Strains?

Have you ever dealt with pounds of moldy cannabis?

It would be great if you didn’t have to!

As your cannabis plants are nearing maturity, a Botrytis mold infection can quickly spread and destroy your crop in a matter of days. Once present, the mold grows fast and is hard to control, especially at high humidities.

Many outdoor cannabis growers feel it is impossible to grow buds worth any value in wet, rainy climates. They have seen the worst of it—pulling immature plants due to bad weather. Early harvests result in poor yields of scrawny, undeveloped buds that are difficult to market.

Here in Hawaii, we are faced with long periods of heavy rain and high humidity. The town of Hilo, Big Island, Hawaii, is one of the world’s wettest areas, with an average of 120 inches of annual rainfall.

Yet, people are producing amazing results outdoors growing marijuana in Hawaii.

How so?

It may come as a surprise to hear there are cannabis varieties that thrive in wet conditions.

Over generations of reproducing, these strains have adapted to humid and rainy environments. The resilience against mold is likely in their genes, a natural response for surviving the flowering process long enough to mature seed.

There are great mold resistant cannabis strains for sale online that you can buy today as regular and feminized seeds to start growing your own!

cannabis field colombia outdoor
Credit: Nicolas Enriquez

Landrace Strains

A landrace strain is a variety of cannabis that grows in a certain outdoor area for multiple generations, typically sourced from wild populations and domesticated by farmers in different parts of the world.

Over time, the plants naturally adapt to the locale and pass on genetic knowledge for success to their offspring via reproduction. Landraces are often open pollinated, but some farmers may select the best phenotypes to use for planting the next generation, further working the line toward resin production, mold resistance, or any other desired trait.

Landraces from wet climates tend to show the most mold resistance. The cannabis varieties from South and Central America, Asia, and Africa are renowned for their strength in growth and bud potency. These plants are historically sativas. However, hybridization is increasingly common.

Landrace strains are ideal for breeding programs. They can prove to be stable and uniform genetics. By crossing the landraces to high-yield hybrids, the best of both worlds collide—resilient genetics that bring in good returns.

Thai Sativa

thai sativa mold resistant strains outdoor huge

The sativa varieties from Thailand, Laos, and Myanmar are some of the tallest, longest flowering, and most mold resistant strains in the world. A rarity in the modern cannabis market, these strains are revered among connoisseurs for their hallucinogenic effects.

The trick to growing Thai sativa is to wait… and wait some more! Started from seed in the spring, many phenotypes won’t be ready to harvest until January or February the next year! The plants have a tendency to drop their leaves during mid-flower, so don’t mistake this as the plant dying off. The buds will keep bulking up in time.

The taste and smell of Southeast Asian sativas are unique, resembling rotten fruit or anise. The high has virtually no ceiling—at high doses, the effect is comparable to magic mushrooms.



Malawi Gold

malawi gold cannabis strain outdoor mold resistant

Considered one of Africa’s best sativa strains, Malawi Gold cannabis is harvested in Malawi’s central and northern regions. This subtropical area’s hot and humid conditions are responsible for the superior mold resistance that Malawi Gold has developed.

The plants grow vigorously with lots of branching and massive size potential. When grown indoors, they perform best scrogged to limit height and increase production of the lower branches. Its long flowering time of up to thirteen weeks equates to an outdoor harvest between the end of October to early November.

Malawi Gold buds are large, incredibly resinous, and have a deep gold, almost amber color. It smells and tastes like exotic spices, lemon, and incense, which can be enhanced by the traditional Malawi Cob curing method. The high is extremely psychoactive.



Pakistani Chitral Kush

pakistani chitral kush mold resistant cannabis strainThe search for a mold resistant indica strain is over. This 100% indica landrace has been intensively selected and reproduced since the mid-nineties for the best hash plant expressions, all while keeping a broad diversity in its population.

Pakistani Chitral Kush matures fast at only eight to nine weeks of flowering, allowing for a wide range of cultivability, with harvest coming as early as the end of September. One phenotype is green and slightly more potent. The other puts on a show of pink and purple colors. They both show great adaptability and impressive resin production. Very resistant to mold, powdery mildew, and pests.

You can expect rewarding yields of marketable, dense buds with a fruity aroma and flavor. Pakistani Chitral Kush gives off a relaxed high felt primarily in the body. A must-try for growers and breeders indoors and out.




honduras landrace mold resistant cannabis strainHonduras a second-generation pure sativa landrace preserved by the Ace Seeds team in 2015. The growth characteristics of Honduras share similarities to long flowering and high yielding lowland Colombian strains, while its floral terpene profiles and stimulating effects compare to Mexican sativas.

These exemplary tropical cannabis plants grow with incredible vigor and show excellent resistance to fungal infections. Its bulky colas produce bumper crops with a high bud-to-leaf ratio. Honduras can be cultivated indoors with strong light intensity and enough space for it to grow, ideally manipulated for optimum yield. Outdoors, this strain thrives in warm and humid climates, maturing by mid-November.

Musky, spicy, and fruity—Honduras is a savory smoke that stands out for its taste and potent, psychedelic effects. A phenomenal choice for breeders and fans of old-school sativas.



Hybrid Strains

A hybrid is a crossbreed—the offspring of two different cannabis varieties.

Hybrid strains offer many advantages to cannabis growers.

The dense, resinous bud qualities of an indica combine with the larger stature of a sativa to create a strain that can grow tall while still producing top-shelf, dank buds.

Hybrids have what’s called “hybrid vigor”, a trait that allows them to outperform both of their parents in growth speed and yield. See—High Yield Strains

Hybrids make up the majority of genetic stock on the market. Nearly all the popular modern strains are hybridized, such as Blue Dream, OG Kush, Diesel, Girl Scout Cookies, Trainwreck, White Widow, etc.

Check out the genetics when searching for a hybrid that resists mold. For the best defense against fungal infection, grow strains bred from hardy or landrace plants, such as the hybrids listed below.

Super Silver Haze

super silver haze strain-plant

Originating from the classic cannabis strains Skunk, Northern Lights, and Haze, Super Silver Haze is a famous award-winning sativa hybrid prized by commercial cultivators and connoisseurs alike.

An ideal outdoor strain for warm climates, the plants get rather tall and unwieldy if allowed to. Indoor growers are advised to use SCROG or LST combined with a short veg cycle to control height. After a long flowering time of ten or eleven weeks, Super Silver Haze rewards growers with giant colas—so large they may require staking. Resistant to mold and disease.

Sweet, herbal aromas and flavors. Long-lasting effects that provide a potent, cerebral head high, progressing into a deep state of relaxation. A favorite smoke of many.



Jamaican Pearl

jamaican pearl marijuana strain mold resistantJamaican Pearl is a cross of the mold resistant sativa hybrid Early Pearl with the Jamaican female plant used to create Marley’s Collie. This created an ideal sativa for outdoor cultivation—even at northern latitudes—that’s quick to flower and shows great resistance to mold.

A tall plant, Jamaican Pearl displays a typical sativa growth pattern but develops quite bushy compared to others. Its flower clusters run together, filling in space between internodes with long “banana” buds. This characteristic allows for abundant harvests, which come after nine to eleven weeks of bloom.

The taste and aroma of Jamaican Pearl are sweet, earthy, fruity, and spicy, reflective of the rich diversity of its genetics. The effect produces an uplifting, happy, warm feeling that radiates throughout the mind and body.



Bangi Haze

bangi haze hybrid strain of weed

Bangi Haze, named for its Nepalese incense aroma, is one of the most stabilized sativa dominant hybrids in the Ace seeds catalog. This fast-flowering, easy-to-grow cannabis strain is an excellent choice for cultivation in a range of harsh climates–from rainy to cold outdoor areas as well as indoors too.

The plants grow compact, columnar, and easy to work with for a sativa. It produces dense buds loaded with trichomes. Superb mold resistance. Ready to harvest at nine or ten weeks of flowering.

Bangi Haze has a sweet taste, like honey or liquor. The high is similar to Congolese sativas, very energetic.



Holland’s Hope

hollands hope mold-resistant weed strain

One of the first Dutch outdoor varieties, Holland’s Hope is a mostly indica strain grown in Holland since the eighties. Developed specifically to thrive in cold climates, it is also very mold resistant.

As with other indica dominant strains, Holland’s Hope remains short and stocky, with lots of branching and overall sturdiness. An ideal candidate for pruning techniques. It has a fast flowering period of fifty to sixty days. The buds are dense, heavy, and grow big.

Classic indica smell and flavor—pungent, earthy, hashy, and spicy. The potent effects hit hard in both the mind and body, leaving users feeling calm and sedated. A great choice for beginner growers and experts alike.



For more information on selecting mold resistant marijuana strains, visit our homepage for the Best-Selling Cannabis Seeds


Disclaimer: Know your laws. Check federal and state/county regulations before buying seeds online. We do not promote or undertake in illegal activity.


Read next: Best Marijuana Seed Banks, Cannabis Seeds for Sale

Jared Cox profile image

Jared Cox is the author behind Mold Resistant Strains. He is a cannabis grower, breeder, and archivist of seeds. His work across several disciplines extensively covers cannabis genetics, cultivation, processing, and sales.

59 thoughts on “8 Resilient Mold Resistant Cannabis Strains for Wet Climates”

  1. Aloha braddah,
    Much mahalos for this blog. This article and the “Top 10 Mold resistant…” are the kinds of info I’ve been looking for for years. So glad I stumbled into your blog. Well-written and very comprehensive. Keep it coming! Aloha, from leeward Oahu.

  2. Hey braddah, I get one question maybe u can answer. Besides the mold problem, another one that messes me up is spider mites. U guys don’t have that prob in the BI? I tried using all the stuff the mainland guys talk about on the message boards….all that kind insecticidal soaps from Home Depot and whatevs. Kinda works at first when I spray everyday, but as the plants get bigger, seems like I fighting one losing battle. I’d like a locals perspective on spider mites. Mahalos!

    And one more time: thanks for your blog! Way more fun reading about locals growing. Shoots!

    • Not really a problem where I’m growing. There are several products that work for spider mite mitigation, check out Trifecta Crop Control. I believe rubbing alcohol mixed with water will do the trick as well.

      • Those f*cking lady bugs do work but they burn themselves out flying in to the thousand watt hps I have. Personally, I wouldn’t recommend it. There’s stuff at the plant store that works great like “liquid lady bug” and a few others that are great for around 25 dollars.

        • When you buy ladybugs they usually come in a plastic bag before releasing them add a cap full of Coca-Cola to the bag and shake ladybugs will not fly away as their wings are stuck to their body and they will stay and lay eggs on the plant their babies are just as hungry as they are

      • I’d been growing for about 13 years in California with no problem, but the last 3 years my crop has ended up with mildew. I started with clones outdoors about 2 weeks ago and have already found mildew and it sucks!

    • Plant Chives. I have then spread around my garden and have no spider mites. they grow like grass, you cut them and they come up again. I had a bid mature one and dived it and put it around the edges. Onion flavor. add to many things.

    • Praying mantis. They work like a charm for any type of bug grubbing on your crop. There visious too and don’t sh*t all over like lady bugs. There also a bit smarter avoiding the lights and rather use them to lure in pray

  3. Nice work braddah, we need it. Hopefully my high CBD Supreme Durban has kept its mold fighting genetics after the cross.

    Mahalo nui.

  4. Aloha,

    I live on the leeward side of the big island and wanted to add another strain to your list of strains that grow well here, or in wet climates.

    Kilimanjaro by WOS.

    I never have ever had a mold or mildew problem. Grows well even in lava cinders. Lol

    Malama pono.

  5. Have my Med license on maui. Does anyone know where I could get a few seeds of these strains? Love to try the m out. I get to big island occasionally.

  6. Purple Maroc, Purple #1, Sweet Purple, Polm Gold, Passion, Shaman, Purple HashPlant, PCK (Pakistan Citral Kush), CDG (Congolese Double Gold), Arne, Viking and many more. All those strains are very fast – max 8 weeks flowering. Purple genetics are very very resistance check them out 🙂

  7. Being a grower in the foothill regions of Maine, I’ve searched for mold resistant strains high and low, lured in by this or that description about such and such a strain’s ability to withstand moisture and temperature fluctuations, which are a problem up here come September and onwards. What I’ve come to find over the years is that there does not exist a rot resistant strain, at least not any I’ve grown. They all submit to the reality of temp swings, dew, and rain. Power plant and Durban I grew last two years, and they have proven no different than any of my other plants in regards to mold and pm… They both mold up and once they get it, it justice accelerates all the same.

    • Hi Jay, I’m in a wet climate area too… I wouldn’t give up just yet tho.. I’ve had good luck with sativa strains, those from tropical areas are the best mold resistant strains generally speaking, but often come at the price of long flowering, which can be tricky in temperate areas unless you have a greenhouse to bring them into winter. WOS Kwazulu has been pretty rock solid for us outdoors in even the rainy season in Hawaii, and it’s fast flowering to boot. Anyways good luck and hope you get the mold situation figured out.

      • Howzit!?
        Are you on BI? I’m in Eden Roc and need to find a few of these mold resistant lines. Easiest way to reach me is text 202-3001. I run the Hawaii Veterans Cannabis Alliance, whuch is a 501c that helps veterans recover from PTSD using cannabis. Anyway, I would really appreciate help finding a few of these strains. Many of our veterans have never grown before and starting them with a plant that can succeed here Hilo side is important to make sure they can get the plants to harvest.
        I hope to hear from you, mahalo for the blog!! Aloha

      • Nice Su I like Jack Herer too, nice creamy buds. Yeah how is Maine treating you? I have a buddy up there growing and he loves it. Haven’t tried vortex yet tho looks pretty good.

    • Hey jay..I’ve had the same luck as you with the Durban and power plant. I live near California boarder on the ocean. Seems like it just depends on the weather each year. Ive had some luck with white rhino and pennywise although not in the same years.. rhino blooms later than Penny so depending on weather one will get budvrot while the other lives on. Just be watchful..
      Thats my lucky strains.. although I always try new ones every year..
      just plant extra..haha

    • I did my 1st grow this year. It was outdoors during the “rainiest summer in at least 120 years” according to published reports. The 90 day precipitation total from a nearly automated station was just under 21 inches of rain.

      Yeah, I picked a bad year…

      I had 2 amnesia haze, 2 og mushrooms and 2 sour diesel (all autoflowers) in the ground. The og kush faired the worst, amnesia haze slightly better and the sour diesel was by far the best. Honestly, the kush and haze really did not produce any real buds… in fact the buds that were forming looked deflated after one particularly bad week in August.

      The SourDs on the other hand have substantial colas (15 inches or so) and respectable side branches with buds.

      They do have a couple spots of mold, which I have cut out, but nothing like what happened to the kush.

      Next year I will do the SD again (probably photoperiod this time) and probably something else with a 1:1 ratio.

  8. Hello from the wet southern oregon coast, I finally have the upper hand in this battle it does not matter the strain! AIRFLOW AIRFLOW AIRFLOW it’s all about the AIRFLOW. Lollipop the bottom third of the plant and completely remove the entire core of the plant. It sounds terrible but I’ve lost a lot because I just wanted to keep all those buds n branches thinking “amount” but losing to much to brush off to the side so I encourage any grower out there to chop the f out of one plant in the garden more than you ever have clear any and all leaf and or bud or small branch from every crotch on all the branches (ladys love a well groomed crotch) but that’s where rot starts not on the buds it starts there and takes the highway to the weakest buds and battles to the death of a lot of buds, anyway call that your tester plant and watch the difference side by side and the outcome is quality bigger tops that show you what your strains can handle and gives you the opportunity to take yourself to school and learn about it hands on (take it from this haoli growing near the beach is tough but can be done n done well)

    • Some great tips Rocky, thanks for sharing. I agree with you on most things, airflow yes, cleaning out plants yes (to an extent) however here in Hawaii the strains really seem to matter, many indica doms will get trashed with mold next to sativa strains clean as a whistle right next to them. Anyways thanks again for visiting and here are some more tips to stop bud rot, gray mold in cannabis.

    • Thanks dude. I have been fighting for a long time in Georgia and last 6 months I have been doing exactly what you are talking. I keep each branch clean till near top fighting also with 35% hyd peroxide deluded to 5% and lots air flow but what helped most is clean lower branches.

      • Jim,

        What have you been growing that has been successful in GA? I live there too and looking to plant some autos very soon. Or should I wait until late August?


  9. For what it’s worth, since I’ve been using cannabis oil before bedtime for better sleep, I’ve acquired high levels of aspergillus internally! I did NOT have high levels before I started, because I had done an organic acids test and there was NO mold. Now in 2018 and another organic acids test, high levels. BEWARE. I need to explore this with the facility I use.

    • Stick your cannabis oil back in the crok-pot and heat it on high for a couple of hours. That will kill the aspergillis and you should have done this at the start. Cannabis oil should be sterile.

  10. If it’s humid enough airborne fungi just attack any and all parts of the plant. I’ve found copper oxychloride mixed with non toxic acrylic paint works well. Problem with defoliation is it opens up wounds on the plant for pathogens to enter.

    I prefer to remove infected sections, cut out any rotted or diseases stem tissue, seal with acrylic paint/copper mix. Doesn’t hurt the plant, keeps it going. I switch.to Foliant sprays with chelated nutrients every 3-4 days at this point. This is due to stem infection and reduced nutrient transport.

    I stop all spraying 14 days prior to harvest and coax them home. Even heavily infected plants I’ve managed to bring to maturity this way. It’s a lot of work. You need check nodes and branches, leaves and stem daily for signs of infection. Preventative maintenance Foliant spraying with a fungicide can be beneficial. However I feel airflow is paramount.

  11. Been fighting mold for 15 years here in MA. I tried many “mold resistant strains” that were NOT mold resistant at all. Last year i tried 6 mold resistant strains. The rule here has been the more frost, the more likely the mold will hit it fast. PEYOTE COOKIES was the amazing exception. It rains here every other day in the fall. Even worse is the heavy soaking dew landing on the buds every morning. Yet Peyote Cookies was almost MOLD PROOF. I gave two friends P.C. plants nearby who also had no mold issues with this strain. AIRFLOW, clearing fan leaves and useless branches is HUGE, i agree. Having the best soil will greatly strengthen the immune system of even indoor strains, outdoors (earthworm castings, good black loam and a huge hole).. Also the most DIRECT SUNLIGHT will help in about every way. I had to skirt a couple big trees. I also like THE CHURCH from GREEN HOUSE seeds. Not quite as mold proof but there will always be a couple in my garden.

    • Hi Dana thanks for sharing your experiences battling mold, I agree from what we’ve seen too- sunlight, airflow and cleaning plants are huge advantages that can save crops during the end and also healthy soil for sure helps the immune systems.

  12. Hi there,

    I have had a growroom infested with PM, almost completely… Ive grown some joystick clones and love triangle and all of them were pretty sick. But there were “accidentally” some clones of blueberry hashplant also and these plants were in the middle of the completely sick joysticks and triangles. they were overcrowded, touching and laying on each other. Blueberry had not a single leaf sick with PM. But i can not find any seeds of BH online.. the temperatures were sometimes around 31Celsius and at night around 22C. humidity around 35 – 55%.
    so this blueberry genetics is superb i guess. also buds much better and super smelly, hard, the flowers were thriving in the middle of the PM battlezone…

    • Hi Jakub,
      Funny you say that, I was just planning on getting some of those again for this year. I’ve also had good experiences growing Blueberry x Hashplants when I did last time, an awesome strain that never got mold growing outdoors in our wet climate. Seems like most places are sold out of them right now but I did find some on Seed City here.
      Good luck

  13. Growing in the uk for 15 years and always the mould issue until last year, and i found THE MOST botrytis resistant strain ever, LEDA UNO from KC Brains. It finishes late 15-31oct and some of the plants are overly leafy, but some are fantastic and all mould resistant like nothing else i have tried, great flavour too and strong sativa hit. I went back to have a look at the leftovers on the plants on 10 December last year and there was still only 10-20% mould on them, i had to go back with a bag and pick some popcorn!!! I have managed to save the two best plants as clones over winter so this year should be even better. I’m also attempting to make fem seeds from these genius plants at the moment. Who would have thought KC Brains, laziest breeder ever, i had tried other stuff of his years ago and it was all pants. He doesn’t even mention mould resistance in the write up. Happy 2019 season all !!!!

    • Awesome thanks for dropping by and sharing that, I would like to see how that strain grows in the tropical wet Hawaiian climate here. Good luck with your growing and seed breeding.

  14. Indoors humidity easy to control in Veg. Room. Light will run it off. Keep your Temp 75 or below is absolutely best mold control I have found.

  15. I have experience growing on Maui, Portland Oregon, and San Francisco. I found that if you can access the plants easily, manually shaking the water off helps immensely. Preferably just at the start of a sunny spell, even in continuous downpours. It helps quite a bit, indoors you should be able to control it by keeping moisture off the foliage and low humidity…

  16. Every single Durban Poison plant I have seen grown(outdoors in New England) and grew myself has had mold issues. Some worse than others both botrytis and PM mostly botrytis though. In fact I am about to go cut bud rot after I am done writing . Still I recommend it she’s quick & would be a great parent to quicken a favorite strain. Being sativa I perfer to keep the feed light almost nothing when in fresh hole (ground). Do keep the rain off her with a simple poly roof. Also likes a long cure to bring out her sweetness.

  17. Do not have website. I live in Ontario near Toronto. I wanted to grow plants that are resistant to mildew and mould.what would be the best 4 strains and the best place to buy gem seeds

    Thank you Angie

  18. Have you tried putting ur patch in a natural valley that’ll funnel the wind to blow on your girls. And also have you tried FIM, or my favorite super cropping while lolly popping the bottom
    This way you have proper air flow and more bud sites the don’t get quite as big and dense. Try those little tricks and I get you’ll notice a difference!


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