Sirius by South Fork
Sirius is an indica-leaning cannabis strain from South Fork, bred by crossing Stardawg × Chem Dawg. Indoors it typically finishes flowering in around 67 days after the flip to 12/12. The environment targets below are the same stage-by-stage bands the Cultivar journal grades real Sirius grows against.
🌿 Start a Sirius journal — free →
Similar strains
| Breeder | South Fork |
|---|---|
| Type | indica/sativa |
| Flowering time | ±67 days |
| Environment | Outdoors |
| Lineage | Stardawg × Chem Dawg |
| Descendants | Blanco |
🌱 Get Sirius seeds →
Affiliate link — supports Cultivar at no cost to you.
🧬 Explore the family: Stardawg · Chem Dawg · Blanco
Ancestry Pedigree
Top Dawg Seeds
Unknown or Legendary
Top Dawg Seeds
Unknown or Legendary
Unknown or Legendary
Unknown or Legendary
Original Strains
Original Strains
Unknown or Legendary
Unknown or Legendary
Original Strains
Growing Sirius: 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 Stardawg or Chem Dawg 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.
Sirius FAQ
How long does Sirius take to flower?
Sirius typically flowers in around 67 days after switching to a 12/12 light schedule. Individual phenotypes vary, so judge harvest readiness by trichome color, not the calendar.
Is Sirius an indica or a sativa?
Sirius is listed as indica/sativa.
What are the parents of Sirius?
Sirius was bred from Stardawg × Chem Dawg by South Fork.
What environment does Sirius 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 Sirius and something looks off? Free AI photo diagnosis →
Facts compiled from public breeder listings. Growing Sirius? 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.