Head Dr. by HNW
Bred by HNW from Yeti OG × Dr Who, Head Dr. is a sativa-leaning cannabis variety. Indoors it typically finishes flowering in around 63 days after the flip to 12/12. The environment targets below are the same stage-by-stage bands the Cultivar journal grades real Head Dr. grows against.
🌿 Start a Head Dr. journal — free →
Similar strains
| Breeder | HNW |
|---|---|
| Type | mostly sativa |
| Flowering time | ±63 days |
| Environment | Outdoors |
| Lineage | Yeti OG × Dr Who |
🌱 Get Head Dr. seeds →
Affiliate link — supports Cultivar at no cost to you.
🧬 Explore the family: Yeti OG · Dr Who
Ancestry Pedigree
Loompa Farms
Unknown or Legendary
Unknown or Legendary
Sensi Seeds
Sensi Seeds
The Seed Bank
Cultivators Choice
Original Strains
Original Strains
Original Strains
Original Strains
Unknown or Legendary
Original Strains
Homegrown Natural Wonders
SubCools The Dank
Breeders Choice
Unknown or Legendary
De Sjamaan
Original Strains
Original Strains
Sannies Seeds
Motarebel
Unknown or Legendary
Unknown or Legendary
Original Strains
Reefermans Seeds
Original Strains
MzJill Genetics
SubCools The Dank
Clone Only Strains
Original Strains
Clone Only Strains
Original Strains
SubCools The Dank
Unknown or Legendary
Unknown or Legendary
Sensi Seeds
The Seed Bank
The Seed Bank
The Seed Bank
The Seed Bank
Cultivators Choice
Unknown or Legendary
Original Strains
Original Strains
Original Strains
Original Strains
Unknown or Legendary
Unknown or Legendary
Sensi Seeds
Original Strains
Unknown or Legendary
Unknown or Legendary
Sensi Seeds
BC Growers Association
Unknown or Legendary
Original Strains
Brothers Grimm
Unknown or Legendary
Unknown or Legendary
Unknown or Legendary
Unknown or Legendary
Unknown or Legendary
Unknown or Legendary
Growing Head Dr.: what to expect
As a sativa-leaning plant, plan for a big stretch after the flip (often 100–200%) — flip earlier than feels natural and keep training options ready. Sativa-leaning plants also generally prefer a lighter feed than heavy indicas. Growers familiar with Yeti OG or Dr Who 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.
Head Dr. FAQ
How long does Head Dr. take to flower?
Head Dr. typically flowers in around 63 days after switching to a 12/12 light schedule. Individual phenotypes vary, so judge harvest readiness by trichome color, not the calendar.
Is Head Dr. an indica or a sativa?
Head Dr. is listed as mostly sativa.
What are the parents of Head Dr.?
Head Dr. was bred from Yeti OG × Dr Who by HNW.
What environment does Head Dr. 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 Head Dr. and something looks off? Free AI photo diagnosis →
Facts compiled from public breeder listings. Growing Head Dr.? 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.