Do you seek highs that are stronger than anything you’ve ever experienced ? We can help. Our high THC strains can produce THC levels that pass 20%. These marijuana seeds deliver strong effects and we guaranteed they'll sprout, making ILGM where to order high THC seeds online. Choose from many options, such as Cherry Pie and LSD, but be prepared. These heavy hitters are some of the highest THC seeds online.

What is THC?

Tetrahydrocannabinol, called THC for short, is one of the active ingredients found in the cannabis plant. THC is responsible for a euphoric effect. It is also one of the oldest hallucinogens in the history of man.

Historical evidence shows that as far back as the first century AD, people were using THC as an herbal remedy. Modern research confirms that high THC cannabis possesses therapeutic properties that benefit people.

Cannabis strains include about 60 different chemicals, some of which provide a psychoactive effect. The two considered to be the most effective and potent are THC and cannabidiol (CBD). Evidence shows that CBD can counteract the psychoactive effects of THC, so choose cannabis strains with relatively low CBD levels for an incredible high.

The Benefits of THC

THC's therapeutic effects are well known. Multiple scientific studies show anecdotal evidence of Tetrahydrocannabinol relieving various conditions such as aches, lack of appetite and sleeplessness.

Expert growers have bred cannabis seeds with phenomenally high THC levels and low levels of CBD. Some of these hard-hitting marijuana strains have THC levels that average more than 22%. This leads to an optimal high without CBD countering the effects.

Strains this high in THC, like Super Skunk, are for seasoned cannabis users only, typically those with a high tolerance. This also means it takes less to achieve a high, meaning a better value, and more potency for hash, dabs, oils, and edibles.

How Hard Is It To Grow Extreme THC Seeds

Most cannabis seeds with extreme levels of THC are hybrids of other strains. That means, how they grow depends on their parent. However, if you are looking for an extreme high without the extreme challenge of growing, choose autoflowering seeds. These high THC marijuana strains are easy to grow, produce great bud, and require minimal maintenance.

For a great place to start, try Robert’s (our founder) signature autoflowering feminized seeds: Gold Leaf Autoflower.

Getting the Most THC from Your Grow

If you’re putting in the time to grow your own marijuana, then you obviously want to make the most of it THC-wise. Starting with high THC marijuana seeds is great, but you should also use the right growing techniques.

There are several ways to do this. First, take care of your plants. Second, you'll need the right amount of water, humidity and nutrients to grow high THC cannabis. Most importantly, you must give your plant as much light as possible for big, healthy, and potent buds

Growing Indoors vs. Outdoors

Cannabis absorbs nutrients from fertilizer, but that’s not its primary source of fuel. Marijuana needs light to thrive. For trichome-covered buds, give your plant as much light as possible.

When it comes to growing high-THC weed, you have two options: growing indoors or outdoors. While indoor growing is the most convenient (or only) option for many growers, it’s not the best way to give cannabis the light it needs. Instead, look to outdoor growing for the highest possible THC.

Cannabis thrives on sunlight. Even the best indoor grow lights can’t quite compare. Getting pure sunlight gives plants the energy and the time they need to support the big buds and high THC levels you’re looking for. Basically, growing marijuana outside leads to higher THC content in your weed.

What Is The High Like?

Good question! Every high is unique to its strain. Since many marijuana varieties are a hybrid of different plants, your experience will vary. Some strains increase happiness, while others produce great hunger, for example.

If you are looking for a specific experience, browse the large selection of marijuana seeds in our store. Each product page details what you can expect to feel. Need some inspiration? Here are the top picks from our team:

ILGM’s Favorite Seeds





Types of High THC Strains

You can coddle your plants all you want, but genetics plays the most important role in THC production. Your best bet is to start by searching for cannabis seeds with plenty of THC. The following strains are some of the best THC producers out there.

Purple Strains

Purple marijuana strains are known for their striking color. While some purple varieties can be a little tricky to grow, most of the difficulty is in achieving that impressive appearance. Choose feminized seeds in this category for some truly high THC weed.

Grandaddy Purple

This strain is an intense, pure indica plant that produces very high THC seeds - it can reach up to 23% THC. The buzz is deeply cerebral and very relaxing, leaving users completely unwound and content. Best of all, the strain is easy to grow indoors or out.

Purple Haze

Not many strains have a Jimi Hendrix song named after them. This fruity, grape-flavored strain is super easy to grow and offers a happy, bubbly high that’s practically psychedelic. It can provide up to 20% THC content. The energetic 70/30 sativa-dominant genetics make it perfect for a night out.

Zkittlez

There aren’t many high THC seeds that are more rewarding to grow than Zkittlez. This candy-flavored herb is a perfectly balanced hybrid. It’s easy to grow and can produce up to 19% THC content in just eight weeks. The balanced genetics produces a warm, mellow buzz that relaxes both the body and the mind.