The Best Cannabis Strains To Grow Outdoors in 2025 

Outdoor Grow Season is Almost Here

As the days begin to stretch and the chill of winter fades, outdoor cannabis growers start to turn their attention to the season ahead. Planting time brings a shift in pace - preparation, planning, and small decisions that will shape the months to come. Whether you're experienced or just starting out, this is the point where things begin to feel real.

Seedsman will be here throughout the journey, offering the best genetics as well as guidance to support your grow every step of the way.

There's still time to choose the right genetics for this season, too. Many growers refine their choices right up to planting, depending on conditions, space, and preference. Below are some options worth consideration for the year ahead.

Why Grow Cannabis Outdoors?

Natural sunlight provides a full spectrum of light that supports healthy growth and terpene development. For many growers, outdoor cultivation also feels more connected to natural cycles and requires less energy input compared to indoor setups.

Plants grown outdoors often develop character influenced by their environment - soil, weather, and seasonal change all play a role in shaping outcomes.

Finding the Right Outdoor Growing Spot

Outdoor growing doesn't require large spaces. While gardens and greenhouses are ideal, many growers also make use of balconies, window spaces, or allotments. 

The key considerations are simple: consistent sunliight, good airflow, and some protection from harsh weather. If discretion is important, companion planting with taller or denser plants can help the garden blend more naturally into its surroundings.

How To Choose a Good Outdoor Cannabis Strain

Choosing the right strain starts with understanding your local climate. Some varieties perform better in warm, stable conditions, while others are better suited to cooler or more unpredictable environments.

Autoflowers are often chosen for shorter growing seasons, as they flower based on age rather than light cycles. Early and fast-flowering varieties can also help when the season starts later or finishes earlier than expected.

Another factor is daylight hours – photoperiod strains require a specific balance of light and darkness to trigger flowering, so understanding local daylight patterns can help you choose the right strain for your area. Resilience is also key – outdoor plants often must withstand pests, mold, and varying weather conditions. Hardy, disease-resistant cannabis strains are ideal, especially for those growing in unpredictable climates.

Beyond that, personal preference comes into play: yield, aroma, flavor, and effect all help shape the final choice. Taking these factors into consideration can help you find a strain that feels well matched to your environment.

With all that in mind, here are some Seedsman recommendations for outdoor growing in 2025.

Recommendation For High Yields

Alaskan Do-Si-Dos

If you’re the type of person who wants a one-and-done harvest that will keep you going for months, Seedsman Alaskan Do-Si-Dos is a wise choice. Bred from Alaskan Purple and Do-Si-Dos, this combination is capable of high potency and high yields if grown with care and attention, and is suitable for outdoor and greenhouse cultivation. It thrives in various climates, including cool, temperate, warm, and dry, and performs well at higher latitudes. 

The aroma features spicy notes complemented by fruity, woody, and pine undertones, while the flavor profile mirrors these characteristics. With THC levels between 16-24%, Alaskan Do-Si-Dos delivers a potent and deeply relaxing effect.

Cherry Punch F1

Cherry Punch F1 is a new variety launched by Seedsman in 2024 as part of our F1 collection. Those who love flavorful cannabis strains may find this especially noteworthy. With rich cherry and tangerine notes, Cherry Punch F1 hits tastebuds like a fruit sorbet, and follows up with a high THC content known for a potent sensation and balanced effects.

As an F1 strain, Cherry Punch F1 shows strong resilience, and has a good reputation for keeping mold at bay. Yields can exceed 750g per plant in the right conditions, and flowering is typically between 9-11 weeks. Cherry Punch performs well in sunnier outdoor conditions.

Recommended For Outstanding Flavor

Purple Ghost Candy

Seedsman Purple Ghost Candy has become a standout in recent years thanks to its combination of ease of growth, potency, and flavor expression.

Yields can exceed 750g per plant under the best conditions, with THC levels often above 25%. The flavor profile blends lemon, lime, peach, and light skunk notes, making for a strain known to be every bit as delicious as it is potent. The effect of this sativa-dominant hybrid is described as physically relaxing with an uplifting mental edge.

Blueberry

A hybrid comprised of Afghani and Purple Thai, Blueberry has been beloved for its fruity appeal since the 1970s. This indica-dominant variety is still notably popular among modern hybrids thanks to its flavor profile, with strong hints of sweet blueberries.

Potency is between 16-24%, and after a flowering time of between 8-10 weeks, successful cultivators typically report medium yields of dense, colorful buds The Blueberry experience is often described as a prominent euphoric effect that brings uplift and energy.

Recommended Fast Flowering Varieties

Purple Punch F1 Fast

An indica-dominant cross between Purple Punch and GMO Cookie x Legends, this robust plant is known to thrive in various climates. Growers are often reassured by its good resistance to mold. Indoor flowering takes just 7-9 weeks, making Purple Punch F1 Fast a good choice for cultivators working in areas with shorter summer seasons prone to earlier rains. Harvest by early September is possible.

While the flowering stage may be shorter, this doesn't mean a compromise on yields – our F1 Fast strains are capable of producing up to 750gm/plant when grown under the right conditions with care. THC content is lab-verified at 27%, and the effect is that of a deeply relaxing indica strain. 

Blue Dream Fast

A popular sativa-dominant hybrid bred from a cross of Blueberry Ice and Super Silver Haze, Blue Dream has been one of the most sought-after cannabis strains of the last decade. Seedsman's Blue Dream Fast offers a shorter flowering period without compromising on yield or quality.

Under ideal conditions, outdoor growers may harvest upto up 700 gm/plant after a flowering time between 7-9 weeks. Blue Dream has shown to thrive in Mediterranean or Californian-type climates, where plants can reach up to 250cm in height. Cultivating Blue Dream is made easier by a good level of protection from pests and plant pathogens. THC  levels around the 18-20% mark, and the sativa-dominant nature means those delicious fruity flowers can create a wecome uplifting, energizing effect.

Recommended Autoflowering Strains

OG Kush Auto

The Original OG Kush is a strain of considerable renown, and still forms the cornerstone of many breeding projects to this day. This is due to its proven status as a stable strain with excellent resilience. Seedsman combined that famed resilience with the speed and sturdiness of a ruderalis variety, creating OG Kush Auto. This variety is recommended due to its reputation for good resistance to pests and mold.

OG Kush Auto is a fairly compact plant, typically reaching no taller than 100cm. This makes it a suitable candidate for cultivation in smaller gardens and balcony grows. OG Kush Auto moves from germination to harvest in around just 75 days, allowing for potential multiple harvests in warmer climates. It may be a shorter plant with a shorter lifecycle, but yields are still very respectable, at around 400gm/plant. 

Northern Lights Auto

Cannabis growers in wetter, colder climates may find Northern Lights Auto to be a great choice for outdoor grows. Coupling the famed hardiness of its photoperiod relative with the speed and hardiness of ruderalis genetics, this is a cannabis strain that can cope with dull and rainy days. An additional benefit to Northern Lights Auto is a reportedly good level of mold resistance.

THC levels are high, and this is an indica-dominant strain, so effects may include couch lock, coupled with cerebral relaxation. Flavors include sweet 'n sour notes and a plum jam taste, along with some earthy pine for good measure. As its an autoflower, there's no need to worry about light cycles, and it’ll be ready to harvest in around 10-12 weeks after germination.

Recommended Classic Strains

Jack Herer

Named in honor of the legendary cannabis activist, Jack Herer is a classic cannabis strain that first emerged in the mid-1990s. Seedsman’s spin on this popular strain is faithful to the original, combining the best of Haze, Skunk, and Northern Lights #5 genetics to bring forth a powerful indica/sativa hybrid.

Yield and potency are both notably high, and Seedsman Jack Herer finishes flowering in around 8-10 weeks. This strai n is known to perform well in most climates, and comes with the reassurance of a good degree of mold resistance. Jack Herer is known for often producing chunky, resinous buds that give an earthy piney scent that carries forward to the flavor profile. Jack Herer has retained its popularity throughout the ages.

White Widow

A candidate as a hall of fame cannabis strain, White Widow is beloved by many growers and consumers the world over. Combining a Brazilian sativa landrace with a highly resinous indica variety from South India helped White Widow, stand the test of time. It remains one of the most popular cannabis strains over 30 years after its introduction.

Outdoor growers may enjoy a sizeable harvest come grows end; with the right conditions and care, White Widow can provide as much as 750gm/plant of quality buds. Those shimmering buds pack a high THC content, and plants offer a good degree of mold resistance, known for thriving in most climate types. After around 8-10 weeks of flowering, the legendary earthy, spicy flavor of White Widow – along with its euphoric, uplifting effects - will be ready to harvest