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High THC
How reviews are checked
Both Kiyoh and eKomi invite customers to leave a review after an order. Kiyoh states that it checks reviews for authenticity. The Kiyoh score covers all our reviews to date; the eKomi score covers the last 12 months.
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This category of high THC marijuana seeds gathers strains whose listed THC level is up to 20 to 24 percent. Strong genetics need a careful grower, because light, feeding and curing all affect the result. Each product page shows THC level, flowering time, plant size and difficulty so you can compare strains before you buy. Treat the figure as a ceiling.
Experience elevated potency with our High THC seeds, perfect for those who enjoy a strong yet balanced high. These strains offer a significant THC concentration, providing uplifting, cerebral effects that are great for creative pursuits, social settings, or simply relaxing. High THC seeds are chosen for their unique balance of power and enjoyment, delivering memorable effects without overwhelming intensity. Discover the ideal balance of flavor and potency to take your cannabis experience to the next level.
What counts as high THC in cannabis seeds?
Breeders select for THC generation after generation, and this category collects strains with high listed figures. The number on a product page is the breeder's own figure for the strain under good conditions. It is a ceiling, not a promise.
In our shop, high THC means a listed figure of up to 20 to 24 percent. Strains listed at up to 25 percent or more sit in our very high THC category, and anything up to 19 percent is in medium or low THC. The figure comes from the breeder, so high is a label we apply, not a lab result.
High THC seeds for sale
The range mixes indica, hybrid and sativa strains. Most are listed with a fast flowering time of 6 to 10 weeks, and difficulty is mostly easy or moderate.
For strains listed at up to 25 percent or more, see our very high THC category.
For a look at the range, try GG Papaya feminized, a compact strain rated easy.
How is THC listed on our product pages?
Each strain shows a THC level written as "up to" a percentage. That is the breeder's figure for the strain. Your own harvest can come in lower, because the result depends on genetics, light, feeding and how you dry and cure the flowers.
Why can a harvest test lower than the label?
Phenotype, the individual plant's own variation, matters. Heat or light stress, overfeeding and an early harvest also cut the result. Harvesting too early is a common reason for a weaker result, so give the plant the full flowering time listed on its product page.
What are THC, THCA and total THC?
THC is the compound that causes the effects people feel. In the living plant most of it is stored as THCA, which turns into THC when the flower is heated. Labs often report the total once that conversion is counted. Product pages show the breeder's figure.
Is a high THC strain right for a first grow?
It can be. Strength has little to do with how hard a plant is to grow, and several high-THC strains here are rated easy. The practical difference is in the care: a strong light, steady temperatures and a patient dry and cure reward you more than with a weaker strain. Choose an easy rating first, and strength second.
Getting the best out of a strong strain
High-THC genetics respond to a strong light, but too much heat can reduce quality. Keep the room temperature steady and avoid overfeeding.
Drying and curing matter just as much as the grow. Dry the flowers slowly in a dark room at roughly 18 to 21 degrees Celsius (64 to 70 degrees Fahrenheit), then cure them in sealed jars, opening them daily at first. A slow dry preserves the flavor and the cannabinoids.
High THC autoflower, feminized or sativa
Which type fits depends on your space.
Feminized seeds let you keep the plant in the vegetative stage longer, which usually means a bigger plant. For a very tall plant, see the sativa seeds, and for a shorter plant with a quicker finish look at indica seeds. For autoflowers, browse the autoflower seeds category and compare the THC figures on each product page.
A note on strength
A high THC figure means a strong product. If you are new to cannabis or have a low tolerance, start with small amounts and wait before taking more. Strong strains can feel overwhelming for some people. We do not give medical advice, and nothing on this page is a claim about health effects.
Ordering
Seeds that fail to sprout are covered by our germination guarantee. See also the germination guide. Please check the laws that apply to you before ordering.
Frequently asked questions
The strongest strains in this category list a THC figure of up to 24 percent on the label, and our very high THC category starts at up to 25 percent. These numbers come from the breeder and show potential under good growing conditions, not a guaranteed result. Your own light, feeding, harvest time and curing affect where your harvest ends up.
No. Genetics set the ceiling, but light, nutrition, temperature and the way you dry and cure all affect the result. A well-grown plant can get close to the listed figure, while a stressed or early-harvested one will fall short. Individual plants of the same strain also vary a little.
Not always. Many are rated easy or moderate, though a few ask for more experience. They reward good light and a full flowering period, so read the difficulty and flowering time on each product page before you order. A strong light and a steady room matter more than usual.
The figure on a product page is the breeder's number. A lab reports THC as a percentage of the dried flower's weight. Your own harvest will differ, because it depends on the plant, the grow and the drying and curing.
High THC covers strains listed at up to 20 to 24 percent, and very high THC starts at up to 25 percent. The figure is the breeder's, so compare it on each product page. Our very high THC category groups the strongest strains in one place.
