Amnesia Mistery
- THC
- 19%
- Flowering
- 9–10 wk
- Terpene
- Terpinolene
- Effect
- Giggly
Emerald Jack strain
Bred by Emerald Triangle Seeds · Jack Herer × Emerald OG
Strain facts
Checked Oct 21, 2026 · 5 sources
Emerald Jack is a sativa from Emerald Triangle Seeds, bred from Jack Herer and Emerald OG. Its THC is about 21% (sources say 20–24%), higher than 46% of the 2,347 strains in our database that list THC. It flowers in about 9.5 weeks (sources say 9–10 weeks).
Learn to grow Emerald Jack: Indoor & Outdoor Growing course, $199
- Type
- Sativa
- THC
- About 21%20–24% across 2 sources
- Top terpenes
- Terpinolene fresh, piney, floral
- Caryophyllene peppery, spicy
- Pinene pine
- Lineage
- Jack Herer × Emerald OG
- Breeder
- Emerald Triangle Seeds
- Flowering
- About 9.5 weeks9–10 weeks across 2 sources; the breeder lists 9.5 weeks
5 sources for this profile
- Leafly public strain listing
- Weedmaps public strain listing
- Breeder information: Emerald Triangle Seeds
Grow facts
- SeedFinder (breeder listing: Emerald Triangle Seeds) Flowering and grow setting
- AllBud (strain database) THC
Grow facts come from the breeder first, then seed banks and strain databases. With 2 sources we show the range and the middle; with 3 or more, the range and the median, after leaving out values far from the rest. The breeder's own value is the anchor, unless it is far from every other source (outside their range and more than 20% from their median); then we show the full range and the median of all of them. A fact from a single source is marked "1 source", and a fact no source lists is left out. Yields are converted to one unit: indoor per square meter, outdoor per plant.
CTU writes every profile from these facts; we do not copy other sites' descriptions. Values that are a generic default in the source data are left out. Last checked Oct 21, 2026.
Source: CTU strain dataset (public strain listings and breeder info, checked by CTU), verified Oct 2026. Potency, flavor and effects vary by grower, batch and plant. Facts no source lists are left out.
How to grow Emerald Jack
The grow facts a breeder or public strain listing gives for Emerald Jack.
- Flowering time
- About 9.5 weeks9–10 weeks across 2 sources; the breeder lists 9.5 weeks. Slower than 77% of strains with a listed time
- Grow setting
- Indoor and outdoor1 source
Flowering window (weeks after the switch to 12/12)
- 1
- 2
- 3
- 4
- 5
- 6
- 7
- 8
- 9
- 10
- 11
- 12
- 13
- 14
Sources: the breeder, seed banks and strain databases listed under sources, checked Oct 2026. Percentages compare with every strain in our database that lists the same fact.
Learn to grow Emerald Jack: Indoor & Outdoor Growing course, $199
About Emerald Jack
Emerald Jack is listed in public strain databases as a sativa from the breeder Emerald Triangle Seeds. Public lineage data lists it as a cross of Jack Herer and Emerald OG.
Emerald Jack THC level
Emerald Jack’s THC is about 21% (sources say 20–24%), higher than 46% of the 2,347 strains in our database that list THC. Potency varies by grower, batch and lab, so read these numbers as typical values, not guarantees.
Emerald Jack aroma, flavor and terpenes
Flavor notes reported for Emerald Jack: pine, earthy, citrus and woody. The terpenes listed most often are terpinolene (fresh, herbal), caryophyllene (peppery, spicy) and pinene (pine). Terpinolene is the lead terpene for about 5% of the high-confidence strains in our dataset, so it is a less common lead. Terpenes shape smell and taste; their levels change from batch to batch.
Reported effects of Emerald Jack
People who have tried Emerald Jack most often report feeling focused, creative, energetic, happy and euphoric. These are user reports, not promises. Effects differ from person to person and depend on dose, setting and tolerance.
Growing Emerald Jack: what the data says
Its listed indoor flowering time is 9–10 weeks. Listed resistance: mold high. Grow where home cultivation is legal, and follow your state rules.
Emerald Jack family tree
Its parents, from published lineage.
This strain
Emerald JackSativa · 20–24% THC · 9–10 wk
Similar strains
Matched on shared parents, top terpenes, type and THC. Never on medical use.
Apollo 13
aka Apollo
- THC
- 15–31%
- Flowering
- 8–9 wk
- Terpene
- Myrcene
- Effect
- Focused
- Difficulty
- Beginner
Cactus Jack
- THC
- 18–27%
- Flowering
- 8–9 wk
- Terpene
- Limonene
- Effect
- Energetic
- Difficulty
- Beginner
Captain Jack
aka Captain Jack's
- THC
- 20–25%
- Flowering
- 8–9 wk
- Terpene
- Myrcene
- Effect
- Focused
- Difficulty
- Intermediate
Sativa strainsTerpinolene strainsPine strainsStrains bred from Jack Herer
Where to buy
Find licensed dispensaries in your state
Only state-licensed stores, checked against official license lists.
Grow it
Flowering time, height and difficulty from the sources, then the full method in the Growing course.
