21 New Best Marijuana Strains for 2021

New 21 Best Marijuana Strains for 2021 Seeds List

We got 21 new marijuana strains from 21 top breeders for this list of the newest best weed strains to grow in 2021. Brand-new indica, sativa, and hybrid cannabis seed strains categorized in the order of feminized, autoflower, and regular seeds.

Feminized New Strains 2021

Kosher Cookies

Kosher Cookies new feminized seeds 2021 release from DNA Genetics

Overview: Kosher Cookies is the newest marijuana seed strain release from DNA Genetics. It was made by crossing two acclaimed American cannabis strains—Kosher Kush and Girls Scout Cookies. This mostly indica hybrid flowers in 8 to 9 weeks indoors, ready by mid to late October outdoors. Growers can look forward to moderate yields of big beautiful buds covered in resin. Kosher Cookies smells of pine, pepper, and citrus. Its heavy high is narcotic and relaxing.

Flowering Time 56–63 days
Strain Breeder DNA Genetics
Pack Size 3/6 seeds
Yield Indoor: 375 g/m2

Buy Kosher Cookies Seeds🌱




Runtz Muffin

Runtz Muffin feminized seeds new strain from Barney's Farm

Overview: Runtz Muffin is the new potent and great tasting marijuana strain from Barney’s Farm. These complex hybrid feminized seeds are the result of crossing Zkittles to Gelato, then crossing the offspring to Orange Punch, which increased the indica dominance to 70% while also improving yield. Runtz Muffin flowers in 8 to 9 weeks indoors or ready to harvest during the first half of October outdoors. Its purple-hued buds are dripping in resin and tasty terpenes with pineapple, citrus, and lavender scents. The effect is powerful, euphoric, and calming. Very high THC content reaching 29%.

Flowering Time 56–63 days
Strain Breeder Barney’s Farm
Pack Size 1/3/5/10 seeds
Yield Indoor: 550–600 g/m2; Outdoor: up to 1000 g/plant

Buy Runtz Muffin Seeds🌱





CBG-Force fem new high CBG marijuana strain seeds

Overview: CBG-Force is Dutch Passion’s first-ever CBG-rich feminized cannabis seed strain, believed to possess great medical potential. Testing at 12–15% CBG and under 0.15% THC, it can be cultivated legally in the same way as hemp. The medium-sized plants grow vigorously and quickly, taking only 7 weeks to finish flowering. The buds from CBG-Force are very frosty and dense, although not sticky at all and with little scent.

Flowering Time 7 weeks
Strain Breeder Dutch Passion
Pack Size 1/3/10 seeds
Yield Indoor: 400 g/m2; Outdoor: 500 g/plant

Buy CBG-Force Seeds🌱




Sowah Sherbert

Sowah Sherbert Marijuana Strain New Fem Seeds

Overview: Sowah Sherbet is a new hybrid marijuana strain from Pheno Finder Seeds. It was made by crossing a selfed Sunset Sherbet to Karma Genetics’ Sowah Diesel Bx2. The plants show the best traits of both parents, from growth vigor to bud quality. In about 10 weeks of flowering, these dank, dense buds are ready to harvest. Sowah Sherbet has a pungent, fuel-like aroma with hints of berry and citrus. Extreme resin yield makes it an excellent choice for extract production. THC content over 20%.

Flowering Time 70–75 days
Strain Breeder Pheno Finder Seeds
Pack Size 5 seeds

Buy Sowah Sherbet Seeds🌱




Lost Pearl

Lost Pearl New IBL weed strain from Greenhouse Seed Co.

Overview: Lost Pearl is a new release of the old-school weed strain Silver Pearl. By selecting the strongest “papaya” phenotype from the original seed stock and backcrossing it over generations, Green House Seed Co. has brought forth fast flowering plants with extraordinarily fruity qualities. Suitable for indoors, outdoors, and commercial cultivation, Silver Pearl displays a typical indica, even growth pattern without much stretching. After 7 or 8 weeks of bloom, growers harvest moderate to high yields of sweet buds, which produce incredibly tasty resin. The effects are fast-acting and clear-headed, felt primarily in the body.

Flowering Time 49–56 days
Strain Breeder Green House Seed Co.
Pack Size 3/5/10 seeds
Yield Medium/High

Buy Lost Pearl Seeds🌱




Gelato #33 Fast

Gelato #33 Fast new weed strain by Advanced Seeds

Overview: Gelato #33 Fast is a modern fast flowering strain by Advanced Seeds. Containing the prestigious Sunset Sherbet and GSC Thin Mints genetics, this “fast” variety grows into a hearty plant with massive size potential and impressive resin production while finishing quicker than the original Gelato #33. In just 45 to 55 days of flowering, growers can harvest heavy yields of sweet, resiny, citrus-flavored bud with complex earthy qualities. THC content measured at 24%. Cheap weed seeds.

Flowering Time 45–55 days
Strain Breeder Advanced Seeds
Pack Size 1/3/10 seeds
Yield 500–550 g/m2

Buy Gelato #33 Fast Seeds🌱




Rainbow Road

Rainbow Road new feminized seeds strain by Paradise Seeds

Overview: Rainbow Road is an exciting new sativa-dominant variety bred from Strawberry Sativa and Hindu Kush genetics. It features maximum flavor, potency, and one of the highest yields Paradise Seeds has ever encountered. The plants are vigorous in growth and may need training indoors to control their stretch. Unusually dense, solid buds develop in 65 days of flowering, absolutely covered in trichome crystals and oozing with resin. Outdoors, its sativa heritage provides resistance to gray mold. Loud fruity terpenes create a delicious potpourri of scents and flavors. Energetic, electric high. THC content is 18–22%.

Flowering Time 65 days
Strain Breeder Paradise Seeds
Pack Size 3/5/10 seeds
Yield Indoor: 600 g/m2; Outdoor: 1 kg/plant

Buy Rainbow Road Seeds🌱





2Y2 marijuana strain seeds new 2021

Overview: 2Y2 is a new exotic weed strain born from a cross between two prominent USA clones—Norcal Do-Si-Dos and Alpha Cut Purple Punch. The growth rate is similar in both parents, which lends itself to the even canopy layer that 2Y2 displays. Great for SoG and SCRoG methods, these indica-dominant plants grow fast, especially during veg. 2Y2 is ready to harvest indoors in 8 to 9 weeks of bloom, or outdoors during mid-autumn. Its high resin content, creamy terpenes, and high THC levels make up a highly rewarding end product.

Flowering Time 56–63 days
Strain Breeder R-KIEM Seeds
Pack Size 5/10 seeds
Yield 500 g/m2

Buy 2Y2 Seeds🌱




Autoflower New Strains 2021

Strawberry Cheesecake Auto

Strawberry Cheesecake Autoflowering Seeds New Cannabis Strains 2021

Overview: Strawberry Cheesecake Auto is a tasty new autoflowering marijuana strain from Seedsman, one of the best seed banks. The strain comes from crossing Strawberry Banana Auto to Cheese Auto. Mostly indica, the plants grow into hearty, squat bushes that yield heavy harvests of resinous, dense buds. As much as 600 g/m2 per plant is possible. Growers recommend stripping the lower bud sites to make larger main colas. Strawberry Cheesecake Auto is best suited to indoor and dry climate cultivation due to its structure and bud density. The flavor is strongly Skunk, with sweet, fruity notes. Balanced effects. Average 15% THC.

Grow Time 12 weeks from seed
Strain Breeder Seedsman
Pack Size 1/3/5/10/100 seeds
Yield Indoor: up to 700 g/m2; Outdoor: 2 kg/plant

Buy Strawberry Cheesecake Auto Seeds🌱




Glueberry Auto

Glueberry Auto Fem new cannabis strain

Overview: Glueberry Auto, just released by MSNL, is an autoflowering variety bred from the Gorilla Glue line along with Blueberry. It offers many benefits such as ease of growth, huge size, and brutal strength. These bushy, tall plants finish at 8 to 10 weeks from seed—a bit longer than your typical auto seeds. However, yield and bud quality more than make up for the wait. Glueberry Auto’s buds pack on tight, filled with frost and purple/orange highlights. The scent is fruity and “chemmy”. 19–22% THC.

Grow Time 8–10 weeks from seed
Strain Breeder MSNL
Pack Size 1–500 Seeds
Yield Over 600 g/m2

Buy Glueberry Auto Seeds🌱




CBD 30:1 Auto

CBD 30:1 Auto Strain MMJ Seeds New 2021

Overview: CBD 30:1 Auto is the latest cultivar from Medical Marijuana Genetics. It’s a non-psychoactive autoflowering hybrid with very little THC and high CBD. The plants are matured in about 90 days from seed, growing under 4 ft tall indoors or a bit taller outdoors. Growers can expect some variation of scents and flavors between the phenotypes, which contain high levels of the terpenes myrcene, limonene, and bisabolol.

Grow Time 90 days from seed
Strain Breeder Medical Marijuana Genetics
Pack Size 1/3/5 seeds
Yield Indoor: 400 g/m2; Outdoor: 400 g/plant

Buy CBD 30:1 Auto Seeds🌱




Dosi Auto

Dosi Auto Feminized Weed Seeds New

Overview: Dosi Auto is the newest autoflowering marijuana seed strain from G13 Labs. It was bred by crossing Girl Scout Cookies to Faceoff OG with the addition of ruderalis genetics. Growing to a medium height, the plants are ready at only 60 days from seed to harvest. Despite the fast grow speed of Dosi Auto, growers can expect bountiful yields of quality cannabis sporting lovely pink and purple weed colors. The taste and smell resemble lime, pine, mint, and citrus with subtle earthy notes. Strong effects and THC content up to 22%.

Grow Time 60 days from seed
Strain Breeder G13 Labs
Pack Size 5 seeds
Yield 400–500 g/m2

Buy Dosi Auto Seeds🌱




Lemon Pie Auto

Lemon Pie Auto Fem Cannabis Strain Seeds by Fast Buds

Overview: Lemon Pie Auto is a flavorful new indica-dominant autoflowering strain from Fast Buds. Growers of all experience levels will appreciate its mold resistance, high yield, and impressive flowers. Perfectly compact, the plants grow stout with a large central cola and many side branches. Lemon Pie Auto takes 8 or 9 weeks to finish blooming. A heavy coating of resin presents lemon zest, fuel, and cream qualities. Balanced physical and cerebral effects. THC levels recorded at 24%.

Flowering Time 56 days
Strain Breeder Fast Buds Seeds
Pack Size 1/3/5/10/100 seeds
Yield Indoor: 400–550 g/m2; Outdoor: 2–6 oz/plant

Buy Lemon Pie Auto Seeds🌱




DC Cure 1:1 CBD Auto

DC Cure 1:1 CBD Auto Marijuana Seeds New Strain

Overview: DC Cure 1:1 CBD Auto is a new feminized autoflower seed variety from Doctor’s Choice, their first low THC/high CBD offering. Producing an equal amount of THC and CBD at roughly 6% of each cannabinoid, this easy-to-grow, moderate-sized plant is an an ideal indoor strain and an excellent choice for medical cultivators. Ready to harvest at 60 to 70 days from germination, bud weight can be maximized by using the SCRoG method. Aromas of citrus, spice, and earth. Chill body high.

Grow Time 60–70 days from seed
Strain Breeder Doctor’s Choice
Pack Size 1/3/5/10 seeds
Yield 50 g/plant

Buy DC Cure 1:1 CBD Auto Seeds🌱




Red Hot Cookies Auto

Red Hot Cookies Auto Seeds New Strains 2021

Overview: Red Hot Cookies Auto is the latest addition to the “red family” from Sweet Seeds. Approximately 60% of plants display vibrant red colors. This cookies strain was bred from two American parents selected for their red flowers—Tropicanna and Tangie. Red Hot Cookies Auto is an easy strain to grow and adapts well to different climates, finishing at 8 weeks of bloom indoors or by the last day of summer outdoors. Both the smell and taste resemble fruit. 17–25% THC.

Flowering Time 56 days
Strain Breeder Sweet Seeds
Pack Size 3/5 seeds
Yield Indoor: 500–600 g/m2; Outdoor: 400–600 g/plant

Buy Red Hot Cookies Auto Seeds🌱




Regular New Strains 2021

Royal Highness

Royal Highness regular cannabis seeds by Humboldt Seeds

Overview: Royal Highness is a recently refined version of Humboldt Seed Co’s original creation—a 3-way hybrid of Cali Dream, Royal Kush, and Trainwreck. These F6 regular seeds do well both indoors and outdoors, growing into slightly indica-dominant plants with a short 55-day indoor flowering time, ready by late September to early October outdoors. The colas grow to enormous sizes and are immersed in shiny resin. Royal Highness has a kushy scent and a skunky, fruity taste.

Flowering Time 55 days
Strain Breeder Humboldt Seed Co.
Pack Size 10 seeds
Yield High

Buy Royal Highness Seeds🌱




Tangerine Somali

Tangerine Somali reg marijuana seeds new strain by Rare Dankness

Overview: Tangerine Somali is a potent new hybrid regular seed strain from Rare Dankness, bringing together the best of haze and fruity flavors. Created by crossing Tangerine Kush to Somali Taxi Ride, this mostly sativa strain grows a little stretchy. Its large buds produce sweet terpenes, which give a pronounced tangerine flavor. The high is exhilarating, soaring, and cerebral.

Flowering Time 65–90+ days
Strain Breeder Rare Dankness
Pack Size 12 seeds
Yield Medium

Buy Tangerine Somali Seeds🌱




Grail Widow

Grail Widow regular marijuana seeds new 2021

Overview: Grail Widow (GROWL) is part of the new Grail series by Mr. Nice Seedbank. The strain is a combination of quality traits from classic varieties. The Haze female parent, in particular, has dominated top-shelf breeds since modern times, while the Widow male adds a sweet, oniony aroma. GROWL is not difficult to grow, although its long flowering time may not be practical for some growers. Patience is a virtue in more ways than one—3 to 6 months of curing is recommended to bring out the best flavors. 18–24% THC.

Flowering Time 70–105 days
Strain Breeder Mr. Nice Seeds
Pack Size 18 seeds
Yield 500–750 g/m2

Buy Grail Widow Seeds🌱




Kali Bubba

Kali Bubba new weed strain reg seeds by Serious

Overview: Kali Bubba is a new release regular seed strain from Serious Seeds. By crossing the beloved Bubble Gum to Kali Mist, an attractive sativa-dominant high yield strain was born. Due to the plant’s tall height and long flowering time, indoor growers are advised to veg for only 1 to 3 weeks. Outdoors, Kali Bubba does best in warm climates where it can finish during late October. Long, full buds grow coated in crystals. The smells and flavors are both sweet and spicy.

Flowering Time 70–77 days
Strain Breeder Serious Seeds
Pack Size 11 seeds
Yield 500 g/m2

Buy Kali Bubba Seeds🌱




Colombia Mangobiche

Colombia Mangobiche weed plant new strain grow of regular seeds by Cannabiogen

Overview: Colombia Mangobiche is a new addition to Cannabiogen’s catalog. This classic sativa line persists to this day due to the outstanding reputation it has earned. Full of great flavors, scents, and packing a powerful psychoactive high, Colombia Mangobiche is one for the landrace cannabis connoisseurs. The plants are tall with lots of branching and form long, contiguous colas. Flowering time is very long at anywhere from 16 to 24 weeks.

Flowering Time 112–168 days
Strain Breeder Cannabiogen
Pack Size 10 seeds

Buy Colombia Mangobiche Seeds🌱




Lemon Tini

Lemon Tini new weed strain reg seeds by Karma Genetics

Overview: Lemon Tini is a new regular seed variety created by crossing Karma’s Sour D Bx3 #A2 to Lemon Tree. Despite being a mostly indica strain, the plants grow a bit stretchy during the 70 to 75 days of bloom. With its distinct sour lemon flavors and superb resin content, Lemon Tini is a great candidate for concentrate making and terpene extraction. The effects are powerful and euphoric.

Flowering Time 70–75 days
Strain Breeder Karma Genetics
Pack Size 12 seeds
Yield Medium/High

Buy Lemon Tini Seeds🌱




Previous years:


20 New Strains for 2020


19 New Strains for 2019


18 New Strains for 2018


Disclaimer: Know your laws. Read federal and local/county laws before buying seeds online. We do not promote or undertake in illegal activities.

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.

5 thoughts on “21 New Best Marijuana Strains for 2021”

    • Hey wat state can i find most of these new strains in like Atlanta Colorado Seattle Cali what state would probably have a lot of these on their list??

    • Ordering seeds is kinda tricky but all depends on your state laws, if yu kno a friend in a cannabis legal state try asking the friend for a favor

  1. Awesome information and thank you.
    Is there a way to figure out which strains grow best in, say the ” northern region” . places such as Michigan. As of now im growing mostly 7-8 week plants and all indica Dom. At least 80% up.


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