The Official Cannabis Independent strain guides
Blue Dream Shop

Growing

Growing Blue Dream: flowering time, yield and breeder specs

Seed versions of Blue Dream flower in about 65–70 days indoors and finish outdoors in October in the Northern Hemisphere. Breeders rate it easy to moderate, with heavy yields and a strong stretch.1,2,3,4

Breeder specs side by side

Source and versionFloweringIndoor yieldOutdoorDifficulty
Humboldt Seed Organization, feminized65–70 days400–600 g/m²Mid-October; 2–3 kg per plant; 3–4 m tall1—
Barney's Farm, feminized65–70 daysUp to 650 g/m²Up to 3 kg per plant; 100–120 cm indoors2—
Crop King Seeds, feminized9–10 weeksAbout 21 oz/m²October; about 25 oz per plant; 5–8 ft3Easy3
ILGM, feminized8–10 weeksHeavy (no figure published)—Beginner5
FastBuds, autoflower9–11 weeks seed to harvest450–600 g/m²3–9 oz per plant; 28–43 in6Beginner6
Roots Cannabis Nursery, Santa Cruz cut8–9 weeksAbout 500–600 g/m²——7
Leafly (average)67 daysUp to 430 g/m²—Moderate4

What the plant is like

Expect a vigorous, medium-to-tall plant that stretches hard in flower and builds long, tapering colas; the original cut shows pale-to-medium green leaves with a bluish tint and abundant orange pistils.7 Leafly notes it suits sea-of-green setups, and clones root quickly.4,8

Teachers like it for the same reasons. Ed Rosenthal chose Blue Dream as the one example hybrid in his Cannabis Grower's Handbook, and an Oaksterdam University instructor uses it in class because it finishes indoors in 8 to 9 weeks, against 11 to 13 for a Haze.9

What to watch for

Sources disagree on mold. Leafly lists Blue Dream as susceptible to powdery mildew and spider mites, while growers quoted by High Times and Westword value its resistance to powdery mildew.4,8,10

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.11 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 12.12 Home cultivation rules are set by each state. This site does not sell seeds.

Sources

  1. Humboldt Seed Organization, Blue Dream (feminized seeds). Accessed Oct 2, 2026.
  2. Barney's Farm, About the Blue Dream strain. Accessed Oct 2, 2026.
  3. Crop King Seeds, Blue Dream marijuana seeds. Accessed Oct 2, 2026.
  4. Leafly, Blue Dream strain information. Accessed Oct 2, 2026.
  5. ILGM, Blue Dream feminized seeds. Accessed Oct 2, 2026.
  6. FastBuds, Blue Dream Auto. Accessed Oct 2, 2026.
  7. Roots Cannabis Nursery, Blue Dream strain review (2026-07-28). Accessed Oct 2, 2026.
  8. High Times, Why is Blue Dream the most popular strain of legal weed?. Accessed Oct 2, 2026.
  9. Leafly, The origin of Blue Dream, the Santa Cruz strain. Accessed Oct 2, 2026.
  10. Westword, Blue Dream is Colorado's most popular strain: here's why. Accessed Oct 2, 2026.
  11. Congressional Research Service, Change to federal definition of hemp (IF13136). Accessed Oct 2, 2026.
  12. U.S. Government Publishing Office, Continuing Appropriations and Extensions Act, 2027 (P.L. 119-103), sec. 2019. Accessed Oct 2, 2026.