Blue Christmas by 2 Guns and a Guy
Blue Christmas lands on the indica-leaning side of the spectrum, 2 Guns and a Guy's take on the 707 Headband × 1979 Xmas Bud line. Indoors it typically finishes flowering in around 69 days after the flip to 12/12. The environment targets below are the same stage-by-stage bands the Cultivar journal grades real Blue Christmas grows against.
🌿 Start a Blue Christmas journal — free →
Similar strains
| Breeder | 2 Guns and a Guy |
|---|---|
| Type | mostly indica |
| Flowering time | ±69 days |
| Environment | Outdoors, Greenhouse |
| Lineage | 707 Headband × 1979 Xmas Bud |
🌱 Get Blue Christmas seeds →
Affiliate link — supports Cultivar at no cost to you.
🧬 Explore the family: 707 Headband · 1979 Xmas Bud
Ancestry Pedigree
Clone Only Strains
Clone Only Strains
Original Strains
Unknown or Legendary
Original Strains
Unknown or Legendary
Humboldt CSI
Unknown or Legendary
Original Strains
Growing Blue Christmas: what to expect
As an indica-leaning plant, expect a modest stretch after the flip (roughly 50–100%) and dense bud structure — which makes late-flower humidity discipline the main risk: keep RH in the 40s once buds fatten to stay ahead of mold. Growers familiar with 707 Headband or 1979 Xmas Bud will recognize much of its behavior. Whatever the listing says, the cut in YOUR tent is the ground truth: log feedings, readings, and photos, and let the trends — not the label — drive decisions.
Blue Christmas FAQ
How long does Blue Christmas take to flower?
Blue Christmas typically flowers in around 69 days after switching to a 12/12 light schedule. Individual phenotypes vary, so judge harvest readiness by trichome color, not the calendar.
Is Blue Christmas an indica or a sativa?
Blue Christmas is listed as mostly indica.
What are the parents of Blue Christmas?
Blue Christmas was bred from 707 Headband × 1979 Xmas Bud by 2 Guns and a Guy.
What environment does Blue Christmas like?
Standard cannabis bands work well: VPD 0.8–1.1 kPa in veg and 1.0–1.4 kPa in flower, with humidity stepping down from 65–75% as a seedling to 40–50% in late flower. See the stage-by-stage table on this page.
📷 Growing Blue Christmas and something looks off? Free AI photo diagnosis →
Facts compiled from public breeder listings. Growing Blue Christmas? A structured journal — with your feedings, readings, and photos — is how you find what THIS cut actually wants.
Track your own grow free — the journal grades your environment against these bands →
Get the one-page grow reference card
VPD, pH by medium, deficiency symptoms and dry/cure targets on a single printable page. Free — plus the occasional grow-data breakdown. No spam, unsubscribe in one click.