The Official Cannabis Independent strain guides
Green Crack No 08 Shop
The Official Cannabis collection · sheet 08No 08 · Green CrackGrow

Growing

Growing Green Crack: flowering time, yield and breeder specs

Green Crack is a fast finisher: Leafly gives 7–9 weeks of flowering and Weedmaps 49–56 days, while seed versions list about 8–10 weeks indoors and an outdoor harvest from late September to early October.1,2,3,4,5,6 Seed sellers and Leafly’s grow guide rate it easy to moderate.3,5,6

Breeder specs side by side

Source and versionFloweringIndoor yieldOutdoorDifficulty
Humboldt Seed Organization, feminized60–65 days400–600 g/m²Early October; 1,000–3,000 g per plant; 1–3 m tall4—
Crop King Seeds, feminized9–10 weeks300 g/m²Late September–early October; 600 g per plant; 5–8 ft5Easy5
DNA Genetics, feminizedAbout 8–9 weeksAbout 500–600 g/m²Late September–early October; 500+ g per plant6Moderate6
FastBuds, autoflower9–10 weeks seed to harvest350–550 g/m²50–200 g per plant; 60–90 cm7Easy (breeder description)7
Clone-only original (SeedFinder entry)About 53 days———8
Leafly (strain page; grow guide)7–9 weeks; 8 weeks in the grow guideModerate to high (grow guide)—Easy (grow guide)1,3
Weedmaps49–56 days—Indoors or outdoors; a short plant2—

What the plant is like

Accounts differ on size. Weedmaps, citing online sources, says the plant grows short and vegetates quickly, with small, densely clustered buds, while Leafly's grow guide says it grows tall and fast before flowering and advises staying on top of trellising.2,3 Humboldt Seed Organization describes a fast-growing, high-yielding plant with a Christmas-tree structure.4,9

Leafly's grow guide notes an extremely strong smell and a preference for temperatures between 70 and 90°F; Leafly's strain page gives 70–80°F at 50% humidity. The guide adds that its fast flowering makes it popular indoors because it allows more harvests a year.1,3

What to watch for

Sources disagree on mold. Humboldt Seed Organization calls its version resistant to mold and pests, while DNA Genetics says growers have found Green Crack susceptible to powdery mildew when humidity is high or airflow poor, which it links to the density of the buds.4,6 Leafly recommends excellent air circulation and clearing lower branches.1

Seeds and the law in the US

Under the amended federal definition of hemp, viable seeds from cannabis plants above 0.3% total THC, including THCA, are not hemp.10 Congress delayed that exclusion, with most of the new definition, from Nov 12 to Dec 11, 2026; only the exclusion of products with cannabinoids the plant cannot produce naturally starts on Nov 12.11 Home cultivation rules are set by each state. This site does not sell seeds.

Sources

  1. Leafly, Green Crack strain information. Accessed Oct 3, 2026.
  2. Weedmaps, Green Crack strain page. Accessed Oct 3, 2026.
  3. Leafly, Tips for growing Green Crack cannabis (2021-02-22). Accessed Oct 3, 2026.
  4. Humboldt Seed Organization, Green Crack (feminized seeds). Accessed Oct 3, 2026.
  5. Crop King Seeds, Green Crack feminized marijuana seeds. Accessed Oct 3, 2026.
  6. DNA Genetics, Green Crack cannabis strain. Accessed Oct 3, 2026.
  7. FastBuds, Green Crack Auto. Accessed Oct 3, 2026.
  8. SeedFinder, Green Crack (Clone Only Strains). Accessed Oct 3, 2026.
  9. SeedFinder, Green Crack (Humboldt Seed Organisation). Accessed Oct 3, 2026.
  10. Congressional Research Service, Changes to the statutory definition of hemp and implications for agricultural policy (IF13136) (2026-09-28). Accessed Oct 3, 2026.
  11. U.S. Government Publishing Office, Continuing Appropriations and Extensions Act, 2027 (P.L. 119-103; H.R. 6500, enrolled bill), sec. 2019. Accessed Oct 3, 2026.