Hijack

Hijack Autoflower Seeds by Auto Seeds

Hijack is a feminised autoflowering cannabis seed that crosses Jack Herer, AK-47, and Cannabis ruderalis into a single compact plant finishing in 70 to 80 days from germination. Auto Seeds built this three-way hybrid to deliver sativa-dominant genetics in a frame that tops out at 50 to 90 cm — short enough for a 60x60 tent, a balcony corner, or anywhere discretion matters. Two of the most decorated sativa lines in cannabis history, compressed into a timeline that suits growers who don't want to babysit a photoperiod schedule.

Why Hijack Autoflower Seeds Stand Out

The genetics behind Hijack autoflower seeds are what make this one interesting. Jack Herer is a sativa-leaning classic bred from Haze, Northern Lights #5, and Shiva Skunk — a strain that's won more Cannabis Cup awards than most breeders' entire catalogues. AK-47 is a sativa-dominant hybrid that's been collecting trophies since the 1990s, known for resin production that punches well above its height. Auto Seeds crossed both of these with Cannabis ruderalis — a wild, non-psychoactive species native to subarctic climates in Siberia and northern Canada — to create a plant that flowers automatically regardless of your light schedule.

That ruderalis backbone is what gives Hijack its autoflowering trait. Instead of waiting for light hours to drop below a certain threshold (as you would with a photoperiod strain), this plant switches to flower on its own internal clock. The result: 70 to 80 days from seed to harvest, no timer adjustments, no light leak paranoia. You set your light to 18/6 or 20/4 and leave it there from day one until chop day.

The honest limitation? Autoflowers don't give you the option to extend vegetative growth. If you stress the plant early — overwatering, transplant shock, nutrient burn — there's no recovery time. The clock is ticking from the moment the seed cracks. That's why we'd call Hijack beginner-friendly in terms of size and timeline, but you still need to get the basics right in the first two weeks.

Hijack Autoflower Growing Specs

How Hijack Autoflower Seeds Grow

Hijack stays compact — 50 to 90 cm depending on conditions — which means you don't need a tall tent or aggressive training. In a 60x60 cm space, three plants fit without crowding each other. In an 80x80, you'll have room to spare. The sativa-dominant genetics show in the leaf structure (expect thinner, more fingered leaves than a typical indica auto) but the ruderalis influence keeps internodal spacing tight. You get a bushy, manageable plant rather than the lanky stretch you'd expect from Jack Herer or AK-47 in their photoperiod forms.

One thing we've noticed with sativa-leaning autos: they respond well to LST (low-stress training) in the first 3 weeks. Gently bending the main stem opens up lower bud sites to light without the stress of topping, which is risky on autoflowers since there's no time to recover. If you're running a basic LED setup, LST can make the difference between a single main cola and a canopy of evenly lit tops.

The 70 to 80 day window is realistic for most indoor setups running 18-20 hours of light. Outdoor grows in northern Europe may stretch closer to 80-85 days depending on temperatures and daylight hours, but the autoflowering trait means you're not waiting for autumn light cycles to trigger flowering. Plant in May, harvest in July or August — that's the balcony grower's advantage.

How to Grow Hijack Autoflower Seeds

1. Germinate your Hijack seeds using the paper towel method or directly in a small pot of moist, airy soil. Taproots typically emerge within 24-72 hours at 22-26 degrees Celsius.
2. Plant the germinated seed 1-1.5 cm deep in its final container. Autoflowers dislike transplanting — start in the pot you intend to finish in. A 7-11 litre fabric pot works well for this strain's compact root system.
3. Set your light schedule to 18 hours on, 6 hours off (18/6) from day one. Some growers run 20/4 for faster growth. Either works — Hijack doesn't need a light change to trigger flowering.
4. Keep nutrients light for the first 2 weeks. Seedlings don't need much. Start feeding at quarter strength around week 3, gradually increasing to half or three-quarter strength as the plant enters pre-flower.
5. Watch for pre-flower pistils around day 21-28. Once you see them, the plant is switching to bloom. Transition to a flowering nutrient profile and maintain consistent watering — no drought stress during stretch.
6. Begin checking trichomes around day 60 with a jeweller's loupe or USB microscope. Harvest when trichomes shift from clear to mostly cloudy with a few amber heads — typically between day 70 and 80.
7. Dry your harvest in a dark, ventilated space at 18-21 degrees Celsius and 55-65% humidity for 7-14 days. Cure in glass jars for at least 2 weeks, burping daily for the first few days.

What Does Hijack Smell and Taste Like?

Expect a nose that leans heavily on the Jack Herer side — sharp, piney, with a peppery edge that hits the back of your throat when you open the jar. The AK-47 influence adds a slightly earthy, sour undertone that rounds things out. During the last two weeks of flower, the resin production ramps up noticeably and the terpene profile intensifies. If you're growing indoors without a carbon filter, your neighbours will know about it from week 6 onwards.

The dried flower has that classic sativa-dominant sharpness: think pine resin, cracked black pepper, and a faint citrus note underneath. It's not a fruity or sweet strain — this one is for growers who appreciate a more traditional, old-school terpene profile. The smoke (or vapour, if you're running it through a dry herb vaporiser) carries the same pine-forward character with a clean, slightly spicy finish.

Hijack Autoflower Seeds — What the Research Says

Cannabis seed products are sold as collector's items and for genetic preservation. The parent strains of Hijack — Jack Herer and AK-47 — are both sativa-dominant genetics with well-documented cannabinoid profiles. According to a pharmacological review, "cannabinoid Delta-9-tetrahydrocannabinol has been determined to have the primary psychoactive effects; the effects of several other key cannabinoid compounds are also being investigated" (Borgelt et al., 2013; PubMed ID: 23386598). Research into cannabis constituents continues to evolve, and the National Institutes of Health actively supports investigator-initiated studies on potential therapeutic applications of cannabis and its constituents.

A 2024 NCCIH meeting summary noted that cannabis strain labelling is associated with genetic variation in terpene synthase genes — meaning the terpene profile of strains like Hijack (inherited from Jack Herer and AK-47) may be more genetically consistent than previously assumed. This is relevant for growers selecting seeds based on expected aroma and effect profiles.

This product is intended for adult collectors aged 18 and over. The information above references published research and does not constitute medical advice.

Hijack vs Other Sativa Autoflower Seeds

If you're weighing Hijack against other sativa-dominant autos, here's where it sits. The Jack Herer x AK-47 cross gives it a more complex genetic background than single-parent sativa autos. The 50-90 cm height range is on the shorter side for a sativa auto — many sativa-leaning autoflowers push past 100 cm, which can be a problem in small tents. The 70-80 day timeline is average for the category; some fast autos finish in 60-65 days, but they typically sacrifice complexity for speed.

We'd pick Hijack over a pure Jack Herer auto if space is your main constraint. The AK-47 genetics help keep the stretch in check while maintaining resin production. If you want something even shorter and faster, look at indica-dominant autos — but you'll trade the sativa-leaning effect profile for a denser, squatter plant.

Frequently Asked Questions

Last updated: April 2026