London OG by Holy Smoke Seeds

London OG strain photo
Type mostly indicaFlower ±56 daysCross Flame Thrower OG × Mob Boss

Bred by Holy Smoke Seeds from Flame Thrower OG × Mob Boss, London OG is an indica-leaning cannabis variety. Indoors it typically finishes flowering in around 56 days after the flip to 12/12. The environment targets below are the same stage-by-stage bands the Cultivar journal grades real London OG grows against.

🌿 Start a London OG journal — free →

Similar strains

OG UpsetterHoly Smoke Seeds · ±56 daysLondon CookiesHoly Smoke Seeds · ±56 daysSpecial NeedsHoly Smoke Seeds · ±56 daysAtomic SherbertHoly Smoke Seeds · ±60 daysBong BiscuitsHoly Smoke Seeds · ±53 daysMandarin Cookie SherbertHoly Smoke Seeds · ±60 daysAuto White Widow x Big BudFemale Seeds · ±56 daysCherry Punch DawgHoly Seeds · ±56 daysChocolate MintVoC · ±56 daysChupilMassMedicalStrains · ±56 daysCindy La PewGage Green · ±56 daysCloudwalker OGBradley Danks · ±56 daysAll Holy Smoke Seeds →
BreederHoly Smoke Seeds
Typemostly indica
Flowering time±56 days
EnvironmentOutdoors
LineageFlame Thrower OG × Mob Boss

🌱 Get London OG seeds →
Affiliate link — supports Cultivar at no cost to you.

🧬 Explore the family: Flame Thrower OG · Mob Boss

Ancestry Pedigree

Flame Thrower OG
Humboldt Seed Organisation
White Fire
OG Raskal Genetics
Fire Kush
Clone Only Strains
OG Kush
Clone Only Strains
Thailand Sativa
Original Strains
Chem Dawg
Unknown or Legendary
Indica
Original Strains
The White
Clone Only Strains
Indica Sativa
Original Strains
Fire Alien Kush
OG Raskal Genetics
Fire Kush
Clone Only Strains
Alien Kush
Alien Genetics
Las Vegas Purple Kush
Clone Only Strains
Northern Lights
Unknown or Legendary
Afghanistan Indica
Original Strains
Hindu Kush Indica
Original Strains
Alien Technology
Unknown or Legendary
Afghanistan Indica
Original Strains
Mob Boss
GrindHouse Medical Seeds Co
ChemD
Unknown or Legendary
Chem Dawg
Unknown or Legendary
Tang Tang
GrindHouse Medical Seeds Co
Blue Sonja
GrindHouse Medical Seeds Co
Block Head
Spice of Life Seeds
Pakistan Indica
Original Strains
Sweet Tooth
Spice of Life Seeds
Sweet Pink Grapefruit
Spice of Life Seeds
Grapefruit
Clone Only Strains
Indica Sativa
Original Strains
Unknown Strain
Original Strains
Blueberry
DJ Short
Blueberry Line
Unknown or Legendary
Temple Flo
DJ Short
Floral Line
Unknown or Legendary
Purple Thai
Unknown or Legendary
Highland Oxacan Gold
Unknown or Legendary
Mexico Sativa
Original Strains
Chocolate Thai
Unknown or Legendary
Thailand Sativa
Original Strains
Afghani
Unknown or Legendary
Afghanistan Indica
Original Strains
HTAF
Unknown or Legendary
Thailand Sativa
Original Strains
Afghani
Unknown or Legendary
Guide Dawg
Holy Smoke Seeds
TreStarDawg
Top Dawg Seeds
Stardawg
Top Dawg Seeds
Chem Dawg
Unknown or Legendary
Tres Dawg
Top Dawg Seeds
Tres Dawg
Top Dawg Seeds
Chem Dawg
Unknown or Legendary
Double Dawg
Unknown or Legendary
Chem Dawg
Unknown or Legendary
Afghanistan Indica
Original Strains
Afghanistan Indica
Original Strains
Chem Dawg
Unknown or Legendary
Bubba 13
Top Dawg Seeds
Bubba Kush
Clone Only Strains
Northern Lights
Unknown or Legendary
Triangle Kush
Clone Only Strains
OG Kush
Clone Only Strains
HP-13
Clone Only Strains
Afghanistan Indica
Original Strains
Thailand Sativa
Original Strains

Growing London OG: 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 Flame Thrower OG or Mob Boss 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.

London OG FAQ

How long does London OG take to flower?

London OG typically flowers in around 56 days after switching to a 12/12 light schedule. Individual phenotypes vary, so judge harvest readiness by trichome color, not the calendar.

Is London OG an indica or a sativa?

London OG is listed as mostly indica.

What are the parents of London OG?

London OG was bred from Flame Thrower OG × Mob Boss by Holy Smoke Seeds.

What environment does London OG 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 London OG and something looks off? Free AI photo diagnosis →

Facts compiled from public breeder listings. Growing London OG? A structured journal — with your feedings, readings, and photos — is how you find what THIS cut actually wants.

Suggest an edit for London OG

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.

Or just open the card now — no email needed →

Published by Cultivar (logmygrow.com), a structured grow journal. These reference bands are the same ones the app grades real grows against. Free to cite with a link. Some outbound product links are affiliate links — see disclosures.