J1 is a sativa-dominant hybrid cannabis strain bred from Jack Herer and Skunk #1, known for a sweet, piney Jack Herer nose with a skunky edge. Its original breeder is not documented, and it is often described as a West Coast clone-only cut. Leafly lists it around 19% THC, and reviewers most often call the high focused, energetic and uplifted.
J1 Strain at a Glance
| Type | Sativa-dominant hybrid |
|---|---|
| Also known as | Jack One, Jack 1, J-1 |
| Lineage | Jack Herer × Skunk #1 |
| Breeder / origin | Not documented; often described as a West Coast clone-only cut |
| THC | About 19% (Leafly average) (typical lab range) |
| CBD | Not listed |
| Dominant terpenes | Terpinolene, Beta-caryophyllene, Myrcene |
| Aroma and flavor | sweet, skunk, pine, Jack Herer spice, citrus |
| Reported effects | focused, energetic, uplifted |
| Best for | daytime use, work and focus, fans of Jack Herer |
Where J1 Comes From
J1, also written Jack One or J-1, is widely listed as a cross of Jack Herer and Skunk #1. Leafly gives that pairing, and Medical Jane’s long-standing review says the same. Who made it is less clear. Strain databases do not name a breeder, and several sources describe it as a cut passed around the West Coast as clones rather than sold as seed.
The pairing is a little circular, since Sensi Seeds’ Jack Herer already carries Skunk #1 in its background alongside Northern Lights #5 and Haze. Adding more Skunk #1 tends to push the plant toward a sturdier structure and a sweeter, skunkier nose while keeping the Jack Herer head high. One Leafly reviewer claims a different lineage involving Afghani and Thai Stick, but we found nothing to back that up.
Don’t confuse J1 with Bodhi Seeds’ J1 Hash Plant, an unrelated Bodhi line. J1 today shows up on menus from several cultivators and in vape and pre-roll products.
J1 Effects: What It Feels Like
Leafly reviewers most often describe J1 as focused, energetic and uplifted. That fits its Jack Herer heritage: a clear, alert head high that many people use for work, chores or creative tasks. The Skunk #1 side tends to round off the edges with a mild body feel, so it is usually described as functional rather than spacey.
It is a daytime strain for most people. Terpinolene-led sativas can feel racy in large amounts, so start with a small dose, especially if you are prone to anxiety, and save bigger sessions for when you know how a batch treats you.
J1 Terpenes, Aroma and Flavor
Leafly lists citrus, skunk and pine as the top flavors and describes a sweet smell carrying the familiar pungency of Jack Herer. Expect a spicy, piney inhale with a citrus lift and a skunky, slightly sweet exhale.
Leafly reports terpinolene as the dominant terpene, followed by caryophyllene and myrcene. Terpinolene is the same terpene that defines much of the Jack Herer family’s fresh, herbal character, and caryophyllene adds a peppery note.
- Terpinolene: fruity, piney and herbal, common in classic sativas
- Beta-caryophyllene: peppery and spicy, also found in black pepper and cloves
- Myrcene: earthy, musky and herbal, also found in mango and hops
Terpene levels vary from grower to grower and batch to batch, so check the lab label on the package. Learn more in our guide to cannabis terpenes.
Side Effects and How to Use J1
Leafly reviewers list dry mouth, dry eyes and anxiety as the most common side effects. The anxious feelings usually come with a heavy dose, so keep sessions light and drink water.
How strong J1 feels depends on the batch, your tolerance and how you consume it. Start low, go slow, and read our guide to dosing cannabis.
Do People Use J1 for Medical Reasons?
Leafly readers most often report reaching for J1 during stress (36%), depression (32%) and anxiety (31%). These are personal reports, not clinical evidence, and anxiety also appears among its possible side effects.
These are user reports, not clinical findings. For what research actually supports, see our cannabis health and research section, and talk to your doctor before using cannabis for a health condition.
Strains Like J1
- Jack Herer: its main parent
- Skunk #1: its other parent
- Lemon Skunk: a bright Skunk-family daytime strain
- Durban Poison: another clear-headed, energizing sativa
- Super Lemon Haze: a terpinolene-leaning, uplifting sativa
Browse more sativa strains, the full strain directory, or our guide to cannabis strains.
More Sativa Strains to Explore
Jack Herer · Jack of Diamonds · Jack Smack · Island Sweet Skunk · Hulkberry · Hella Jelly · All sativa strains
Where to Buy J1
Dispensary menus change every week, and J1 may be sold under its own name, as a cross or as a pre-roll or vape. The fastest way to find it is to check store menus online before you go. In Vancouver, browse Vancouver dispensaries and check the menus at stores like Craft Cannabis Mill Plain and The Herbery NE 78th. In Long Beach, browse Long Beach dispensaries and check the menus at stores like L B Green Room and Catalyst – DTLB. You can also browse licensed dispensaries in every state we cover. Adults 21 and older can buy with a valid photo ID; see cannabis laws by state for purchase limits.
J1 FAQ
Is J1 indica or sativa?
J1 is a sativa-dominant hybrid. Leafly lists it as a hybrid of two sativa-leaning strains, and its effects are mostly energizing.
What is J1 a cross of?
Jack Herer crossed with Skunk #1, per Leafly and Medical Jane.
Who bred J1?
The breeder is not documented. It is usually described as a West Coast clone-only cut.
How strong is J1?
Moderately strong. Leafly lists about 19% THC.
What does J1 taste like?
Citrus, pine and skunk with the spicy pungency of Jack Herer.
For adults 21+ in legal states. Strain information reflects breeder descriptions, lab data and user reports; effects vary by person and batch. Not medical advice.
