Mold: a fungus that thrives in damp conditions with poor airflow that can devastate an otherwise healthy marijuana plant. It can be one of the most terrifying things that an indoor cannabis grower can encounter. If not handled immediately, the whole harvest can be wasted. It may seem impossible to grow weed in stuffy grow rooms, but we’ve got you covered with our latest addition to the Indoor Season series. There are plenty of mold-resistant weed plants out there, and we’ve got the lowdown on the best ten strains on the market.
Why Mold-Resistant Strains?
If you live in a part of the world that has rainy summers and falls, growing cannabis can be a challenge. The same issue arises within poorly-ventilated grow areas. In either case, the last thing you want is for your buds to get mushy, moldy, and rotted. However, it doesn’t have to be impossible to grow good bud in wet, rainy climates or a stuffy attic space. In fact, there are some mold-resistant cannabis strains out there that can actually thrive in wet weather. That’s right, some strains of weed are naturally resistant to issues caused by moisture. Continue reading to find out what these marijuana strains are.
Mold Resistant Cannabis Strains
Here's What You Need To Look For In Mold-Resistant Cannabis
What makes for a mold-resistant cannabis strain? Well, it’s all in the genetics. Many mold-resistant strains come from the humid and rainy regions of Asia and Central America. These strains (usually Sativas), otherwise known as “landraces,” have, through generations, adapted to local climates with less than ideal growing conditions. Landraces have become so naturalized to their original environments that the plants are naturally less susceptible to mold and can thrive in wet conditions. Crossing these strains with others has led to hybrids with mold resistance and hardiness on another level! Many of them have spongier buds and wider internodal spacing that allows for better airflow, and therefore better mold-resistance.
Herbies Top 10 Mold-Resistant Strains
One of the key characteristics to mold-resistant strains is high resin production, since that’s how the plant protects itself from the elements. Luckily for us, the resin is where all the good stuff is! Not only is this list full of strains that are hardy and resilient, but most of them are pretty darn potent, too.
Mold-Free With Moby Dick
Moby Dick is a whale of a strain, pun totally intended. With lemon and spice-flavored buds packed full of THC up to 27%, this strain is not for the faint of heart! To get the most out of Moby Dick – one of the best outdoor mold-resistant strains – you’ll need to practice some topping to maximize your harvest. She thrives best outdoors, where she can grow big and tall and won’t be threatened by mold, since the strain naturally prefers sunny, Mediterranean climates.
Candy Kush Auto, A Strain That Basically Grows Itself
There are mold-resistant autoflower strains out there as well: Candy Kush Auto by Auto Seeds, for example. This Indica-dominant hybrid has plenty of terpenes that help the strain fend off disease, and which also give Candy Kush her spicy caramel flavor. She has characteristics that are attractive to every grower: super resistant to pests and weather, and a discreet height of 100cm (3’2”) indoors. How easy Candy Kush is to grow isn’t the only thing that’s sweet – she also clocks in at 22% THC and 2% CBD!
Get Results With Indica Crystal Extreme
Indica Crystal Extreme, otherwise known as ICE, is a hybrid with hard-hitting Indica effects. Growers will be pleased to know that ICE’s genetics make her naturally mold-resistant thanks especially to her Northern Lights ancestry. Her resinous buds will protect your crop from disease and leave you pleased later with the potency. ICE plants are stocky indoors but can reach up to 2m (6’5”) tall outdoors, with huge harvests of 750g (1.6lb) per plant.
The Power And Beauty Of The Church
Another entry in our list of the best mold-resistant cannabis strains is The Church, also a strain related to Northern Lights. It has origins in the European region, which means that she can handle a wide variety of non-optimal growing conditions. Resistant to mold, mildew, and pests, The Church is incredibly easy to manage. All that sticky resin will keep your plant safe from mold – plus, you’ll see a yield of about 700g (1.5lb) per square meter indoors. We also can’t help but mention how beautiful the buds are: light green and full of trichomes, and adorned with orange and purple hairs.
The Sweet Escape With Kandy Kush
Next up is the sweet Kandy Kush from Reserva Privada, an Indica-dominant cross between Trainwreck and OG Kush. Thanks to the latter strain, this variety prefers colder climates and is naturally resilient to mold and mildew. You’ll have nice yields whether you’re growing her inside or out, and the buds will be deliciously fruity, dense, and sticky. You can definitely add Kandy Kush to the list of awesome mold-resistant indoor strains.
Durban Poison, Of Course!
This wouldn’t be a list of the best mold-resistant strains without Durban Poison, a pure Sativa that’s exceptionally resistant to mold and disease. This strain has been around for decades, and for good reason: she’s strong and hardy, but still gets absolutely massive when grown outdoors, with huge yields despite a short flowering time of 8 to 9 weeks. The heavy, resin-laden blooms make for 500g/m2 (1.6oz/ft2) of resilient buds that are also 22% THC potent.
Pest-Free With Panama
Brought to the masses from Central America, Panama is a triple threat Sativa that brings together the best characteristics of three mold-resistant strains: Panama Goddess, Green Panama, and Panama Red. This incense and vanilla-flavored strain can handle a variety of climates provided you supply her with enough nutrition! Expect to see alluring pinkish-red pistils packed into large, fragrant buds that will be sticky with 21% THC resin once it’s flowering time! Great both indoors and out, Panama has exceptional resistance to pests and humidity.
Strawberry Cough: Durable And Delicious
Strawberry Cough has earned her spot on this list from her reputation as a guerilla growing strain that’s capable of enduring days of rain and wet weather, as well as doing well indoors. Although she’s not as heavy a yielder as some of the other strains on this list, with plenty of nutrients, light, and water, you can still expect an awesome 400g/m2 (1.3oz/ft2) of 22% THC from your plants – and expect each of those buds to deliver a life-like strawberry flavor!
Super Silver Haze For Super Buds
Super Silver Haze is another strain with Northern Lights ancestry, but this time bred with Skunk and Haze to create a 70% Sativa hybrid. She gets her mold resistance from a thick layer of trichomes and high resin production – perfect for novices growing weed in high-humidity environments. Super Silver Haze likes hot, equatorial climates but also does well indoors. Give your plants lots of nutrients and, come harvest time, you’ll see the results in immense, drooping branches full of sweet and citrusy 19% THC buds that glitter with resinous trichomes.
Straight Outta Cali: Blue Dream
Although this list isn’t in any particular order, you could say we saved the best for last: Blue Dream, a California classic. This Sativa-dominant strain is famous for her huge, dank buds with a potency of 17-24% THC. Blue Dream is infamously easy to grow from seed, and also happens to be one of the most mold-resistant weed strains available. Although her natural resistance to sickness will make the growing process easy on you, make sure to give your plants some extra love and attention toward the end of flowering to ensure quality bud that oozes pine and fruit flavors.
Say No To Mold!
Mold is a danger for both indoor and outdoor grow operations, and can render a cannabis harvest totally ruined. By making sure to keep the temperature and humidity under control, you can mitigate the chances of mildew finding its way into your crop. Choosing a strain that’s specifically mold-resistant can nip the problem in the bud before you even start growing. What are your favorite mold-resistant weed strains to grow in wet conditions? Let us know in the comments below.