Alien OG by Oaseeds Genetics

Alien OG Strain Info

If you're chasing a cannabis strain that hits like a spaceship re-entering Earth’s atmosphere, Alien OG is the kind of ride you’ll want to strap in for.

Born from the explosive union of Tahoe OG and Alien Kush, this hybrid from Oaseeds Genetics carries the legacy of two legendary lineages straight from California’s finest.

Think of it as the child of a cosmic warrior and a forest mystic—powerful, mysterious, and deeply rooted in the OG Kush universe.

Alien OG seeds have gained cult status among both seasoned growers and thrill-seeking smokers, and it’s no wonder why.

This is a balanced hybrid with a near 50/50 sativa-indica makeup, though its effects feel anything but neutral.

Its buds are dense, sticky, and dripping in resin, like green meteorites fallen from the sky and covered in crystalline frost.

The plant grows low and compact, with a sturdy structure that can hold the weight of its glistening flowers.

You’re looking at an average height of about 150 cm (5 ft), which makes it ideal for those who want big performance without towering beasts in their tent.

Flowering Time & Yield

Alien OG has a flowering period of 8 to 9 weeks, meaning you won't be waiting long to blast off into its psychoactive orbit.

In indoor setups, expect solid returns of 450–500 grams/m² (15.8–17.6 oz/ft²), provided it’s grown under the right lights and with a little love.

Outdoors, in dry and Mediterranean climates, it can reward with up to 600 grams (21.1 oz) per plant, or even more in dream conditions.

Some phenos have been known to shoot for the stars and deliver up to 1000 grams (35.2 oz) per plant, especially when they feel at home under the sun.

Effects and Aroma

Let’s talk about the ride—because that’s where Alien OG truly earns its name.

With THC levels that can rocket up to 28%, this strain isn’t for the faint of heart or for casual first-timers just looking to chill.

The high kicks in with a cerebral rush, like a burst of lightning across your brain, unlocking doors to creative dimensions and kaleidoscopic ideas.

That head buzz gently evolves into a warm, body-melting calm that leaves your muscles humming in harmony without locking you to the couch—unless you overdo it, of course.

Perfect for music lovers, artists, hikers, or anyone who wants to get lost in the moment.

Now imagine cracking open a fresh pine cone in a lemon grove after a summer rain—that’s the smell of Alien OG.

The aroma is bright, earthy, citrusy, and sharp like a cold soda on a hot day, thanks to terpenes like limonene, pinene, and myrcene.

The taste is just as hypnotizing—a delicious swirl of lemon, sweet hash, pine, and a whisper of fuel that lingers on your tongue like a secret you're not ready to forget.

Alien OG seeds are feminized cannabis seeds, so there’s no time wasted on unwanted males.

If you're into strains that deliver maximum potency, OG character, and sensory overload, this one’s your ticket to the stars.

Growing Tips & What We Love Most

Alien OG isn’t the kind of strain you just throw in the dirt and forget—it deserves attention, but oh man, it rewards every bit of it.

We’ve found that this strain performs best in dry, Mediterranean-like climates, where the risk of excess moisture is low.

Humidity is not its friend—keep relative humidity between 40% and 50% during flowering to avoid mold and mildew creeping in.

Its resistance to pests and diseases is average, so you’ll want to stay sharp with monitoring and prevention.

It doesn't like extremes, so maintaining a stable temperature between 20°C and 26°C (68°F to 79°F) keeps it thriving and happy.

We recommend a light, airy substrate and pots of at least 10–15 liters (2.6–4 gallons) to give the roots room to breathe and grow strong.

This strain has a bushy, compact structure, so some light defoliation helps boost airflow and light penetration.

Let’s be honest—Alien OG isn’t the easiest to grow, and beginners might find it a bit picky at times.

But with consistent care and a bit of experience, she becomes a truly impressive specimen with a cosmic yield and top-tier flower quality.

What really gets us every time is how those buds look like they were carved from icy emeralds, so dense, resinous, and beautiful you almost feel bad grinding them.

Alien OG Strain Characteristics

Seed Type: Feminized

Genetics: Alien Kush x Tahoe OG Kush

Genotype: Balanced Hybrid (approx. 50% Indica / 50% Sativa)

Breeder: Oaseeds Genetics

Flowering Time Indoor: 8–9 weeks

Harvest Time Outdoor: Late September to Early October

Indoor Yield: 450–500 g/m² (15.8–17.6 oz/ft²)

Outdoor Yield: 600–1000 g/plant (21.1–35.2 oz/plant)

Height: Up to 150 cm (5 ft)

Structure: Compact and robust

Bud Appearance: Dense, sticky, crystal-covered

Resistance to Pests/Disease: Medium

Recommended Climate: Dry, warm, Mediterranean

Difficulty Level: Medium to High

THC Content: 22% – 28%

CBD Content: Up to 2%

Terpenes: Limonene, Pinene, Myrcene

Aroma: Pine, lemon, earth, hash, sweet fuel

Flavor: Citrus, pine, sweet hash, earthy with a fruity twist

Effects: Cerebral euphoria, creative spark, deep body relaxation, long-lasting

Best For: Experienced growers, OG Kush lovers, creatives, and explorers

Alien OG FAQ

Is Alien OG sativa or indica?

Alien OG is a balanced hybrid strain, offering roughly a 50/50 mix of indica and sativa genetics.

This means you get the best of both worlds: the cerebral energy and uplift of sativas, combined with the body-melting relaxation of indicas.

Sativas are typically known for their daytime use, boosting creativity and sociability, while indicas are famous for their calming, full-body effects ideal for the evening or winding down.

Alien OG brings them together in a powerful, well-rounded experience that’s both stimulating and deeply relaxing.

How strong is Alien OG?

Alien OG is one of the most potent marijuana seeds on the market, with THC levels that can reach up to 28%.

That puts it firmly in the heavy-hitter category, making it ideal for experienced users looking for intense effects and long-lasting sessions.

Is Alien OG good for beginners to grow?

This strain is not the most beginner-friendly, as it requires stable environmental conditions and regular care to prevent issues like mold or nutrient deficiencies.

However, for growers with some experience and attention to detail, the reward is top-shelf buds and heavy yields that make the effort totally worth it.

What climate is best for growing Alien OG?

Alien OG thrives in warm, dry, and Mediterranean climates, where relative humidity stays low during the flowering stage.

It doesn’t do well in rainy or overly humid environments, so greenhouse or indoor grows are often the safest choice in unpredictable weather zones.

What does Alien OG look like when it’s ready to harvest?

Expect compact, rock-hard buds dripping in trichomes, with bright orange pistils and a thick layer of sticky white crystals.

Its appearance is one of the most striking features—like jewels from another galaxy, ready to be cured and smoked.