8 Resilient Mold Resistant Cannabis Strains for Wet Climates

Growing cannabis in wet humid climates is a challenge without some good mold resistant strains. The best mold resistant strain seeds grow hardy, resilient cannabis plants that can fully finish up dank outdoors in rough conditions—even in the pouring rain.

wet climate mold resistant cannabis cultivation
Wet climates provide a challanging, but possible grow.

Why Mold Resistant Strains?

Have you ever dealt with pounds of moldy cannabis?

Plants soaked, buds mushy and trashed, covered in grey/blue mold and black bud rot. Only to harvest and bring them inside to further multiply the problem.

Many 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 the 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 wettest areas in the world, at an average of 126.72 inches (3,220 mm) of annual rainfall.

Yet, people are producing amazing marijuana outdoors in Hilo, Hawaii.

How so?

It may come to you as a surprise that there are cannabis varieties adapted to wet conditions—they can even thrive in them!

Through generations of inbreeding and cross pollination, many strains of cannabis are naturalized to humid and rainy environments. The gained resilience is likely in their genes, to make it through the flowering process long enough to mature seed.

There are great mold resistant cannabis strains for sale 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 cannabis strain is a breed of marijuana that has grown in an area by itself for generations. Also known as feral cannabis. The plants learn to grow in and adapt to the local climate, passing the knowledge gained to their offspring.

Landraces from wet climates show superior mold resistance, vigor and hardiness. The tropical ones are mostly sativa strains; however, cross pollination can occur. Sativas from South and Central America, Asia and Africa are renowned for their strength in both growing and bud potency.

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

Durban Poison


durban poison strain outdoor mold resistant

Durban Poison is a 100% sativa, inbred, never hybridized landrace originating from South Africa. Strong and hardy seeds and plant, exceptionally resistant to mold and disease. Flowering time is short for a sativa, 8 to 9 weeks, which makes her suitable for all kinds of growers.

Durban Poison gets huge outdoors and reaps wonderful fat bud harvests, even in awful weather. Durban has been around since the ’70’s and still competes in today’s market with her high quality buds.

Smells and tastes like a minty herbal spice, a Durban delicacy. Fast flowering time, impressive yields and outdoor resilience equals prime outdoor cash crop.




 Brazil Amazonia


brazil amazonia resilient weed strainThe search for a mold resistant indica is over. This variety is a pure indica strain collected from the Amazon rainforest. Its buds are rock hard dense with a nice citrusy smell and flavor.

Brazil Amazonia matures fast and stacks up big dank buds. When vegged under lights she will finish flowering before 8 weeks. Big yields for all kinds of growers, indoors and outdoors. A vigorous, fast growing strain that performs well in clone rotation setups.

Rewarding, top quality outdoor grow operations have been pulled off with Brazil Amazonia seeds. Mold resistant and easily marketable, Brazil Amazonia is a true performer.



Colombian Gold


colombian gold landrace resistant cannabis strainColombian Gold is a legendary landrace sativa originating from the Santa Marta mountains of Colombia. This strain has laid the foundation for many modern cannabis genetics—the infamous Skunk #1 seeds come from Colombian Gold as well as countless others.

An original beaster, Colombian Gold comes from a high elevation and can handle harsh weather with strength. Mold and pest resistant. Colombian Gold seeds were used by Simon Bolivar as he traveled around the Amazon rainforest trading spices and medicinal plants with natives during his conquests.

Musky, spicy, fruity—Colombian Gold is a savory smell and smoke. Naturally titanic; don’t be surprised when harvesting multi-pound plants.



Thai Sativa


thai saitva mold resistant strains outdoor huge

Thai landrace sativas grow larger than nearly any other strain, they beast out into massive cannabis trees. Thai sativas are among the most mold resistant strains in the world. However, their lengthy flowering time is not for the faint of heart.

Started from seed in the spring, many Thai seed phenotypes will not finish flowering until January or February the next year!

The trick to growing Thai sativa is patience. They have a tendency to drop their leaves during mid-flower, making growers think they’re ready to harvest—but they’ll still keep going if you let them. Cut too early you’ll lose a lot of bud weight, so let those arm size colas get big and droopy! Thais have the potential to be super heaviest yielding trees that bring in many kilos per plant. The smell is unique to SE Asian sativa strains, resembling rotten fruit or anise.



Hybrid Strains

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

Hybrid strains offer many advantages to the grower:

The dank, dense, resinous bud qualities of an indica combine with the bigger stature of a sativa to create a strain that grows big and makes top shelf quality buds.

Hybrids can have what’s called “hybrid vigor”, a trait that allows them to out perform both of their parents in growth speed and yield.

Hybrids make up most of the genetic stock of cannabis nowadays. Nearly all popular modern strains are hybridized such as: Blue Dream, OG Kush, Diesel, Girl Scout Cookies, Trainwreck, White Widow, etc…

When searching for a suitable hybrid, always look at the parents. For best defense against wet humid climates, find strains that are bred from mold resistant or rainy climate landrace strains.

Hybrids made from landraces or hardy inbred strains can perform better outdoors than the over-hybridized alternatives (although there are exceptions).

Orient Express


orient express hybrid strain of weedOrient Express is a mix of the legendary Vietnam Black crossed to a Yunnan Chinese indica. Soaringly high bud production when grown well, these compact indica bushes get form fat heavy buds over a short flowering period

Vietnam Black is renowned for its incredibly strong psychedelic high, described as extremely intense—even frighteningly mind-bending. It’s the kind of weed you smoke at a party and then everybody gets arkward. Orient Express retains the intensity of the Black, but a little more relaxed with the addition of an indica. Musky floral smell and taste, the smoke hits real smooth and big bong hits taste great.

Orient Express will hold up to any weather conditions. Mold issues are non-existent, so it’s an ideal wet weather strain. The buds get to a very good quality grown outdoors and indoors, be sure to bring Orient Express all the way til the end for best results.



Super Silver Haze


super silver haze strain-plantOriginating from classic inbred strains Skunk, Northern Lights and Haze, Super Silver Haze will blow your mind with its drooping, colossal flowers—the plants require staking as the buds get super big and heavy.

Super Silver yields exceptionally well and grows into giant plants. Grow Super Silver Haze seeds outdoors and be flooded with killer pot come harvest time. The price you pay for these fat yields will be a longer than normal flowering time, but your wait will be rewarded in the form of killer sativa dankness.

This strain resists molds and diseases. Be sure to provide loads of nutrients to Super Silver Haze for  maximum returns. Then enjoy having tons of nice silver buds with a sweet taste like sugar cane.



Strawberry Cough


strawberry cough strain-budWith mysterious genetic origins and a taste to die for, Strawberry Cough handles the bad weather surprisingly well. Strawberry Cough has proven itself though guerrilla growing operations in poor, wet conditions with days of rain, much surpassing expectations for a strain so frequently grown indoors.

The flavor of Strawberry Cough most certainly lives up to its name. Incredibly sweet, literally tasting just like strawberries—anyone who gets a sample will instantly be hooked.

While not the insane heavy yielder, with proper care Strawberry Cough seeds turn into large plants outdoors, producing ample amounts of bud from each plant. Assuming there’s plenty of light, water and nutrients, prepare to be supplied with a solid amount of amazingly fruity pot.



Power Plant


power-plant mold-resistant cola-plant strain

Power Plant seeds are descended from South African dagga genetics, obtained in 1997 and hybridized for increased yield and bud formation.

This strain is an ideal cash cropper—enormous-sized competitive quality buds on hardy plants that will handle any rough outdoor climate. Power Plant’s flavor has been described as a “sativa that tastes like Kush, with a pungent, musky smell”. Get insane harvests from easily clone-able plants, Power Plant is perfect for your outdoor or indoor grow operation.

Flowering is short for this mostly sativa strain at only about 8 weeks. The seeds grown are very uniform, producing marijuana with great bag appeal. Power Plant is for the serious high yield farmer.



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: Top 25 Best Sativa Strains

48 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 on the BI. There are various marketed products available for sale, but rubbing alcohol mixed with about 40% water will kill the buggers. Also, if you’ve ever watched the series Trailer Park Boys, they collect ladybugs to put on their plants to combat the spider mites. Aloha!

      • 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

    • 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.

    • Awesome Chris! I’d love to see some pics of that Kilimanjaro grown on the Big Island… I’m on the windward side. Come over for some doobies!

  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 Thai strains, those Asian sativa are the best mold resistant strains in my opinion but I doubt you can find any real deal Thai strains that would finish up in time for outdoors where you’re at unless you had a greenhouse with additional lighting to bring her into Dec. WOS Kwazulu has been pretty rock solid for us outdoors in even the rainy season in Hawaii. Anyways good luck and hope you get the mold situation figured out.

      • 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

  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.

  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


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