Sour Larry BX1 by Thunderfudge

Sour Larry BX1 strain photo
Type indica/sativaFlower ±65 daysCross Sour Larry × Ultimate Chem 08

Sour Larry BX1 lands on the indica-leaning side of the spectrum, Thunderfudge's take on the Sour Larry × Ultimate Chem 08 line. Indoors it typically finishes flowering in around 65 days after the flip to 12/12. The environment targets below are the same stage-by-stage bands the Cultivar journal grades real Sour Larry BX1 grows against.

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Similar strains

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BreederThunderfudge
Typeindica/sativa
Flowering time±65 days
EnvironmentOutdoors
LineageSour Larry × Ultimate Chem 08
DescendantsSour Larry Pebbles, Sour Larry BX2, Strawberry Sour Larry

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🧬 Explore the family: Sour Larry · Ultimate Chem 08 · Sour Larry Pebbles · Sour Larry BX2 · Strawberry Sour Larry

Ancestry Pedigree

Sour Larry
Unknown or Legendary
Sour Diesel IBL
Reservoir Seeds
Sour Diesel
Unknown or Legendary
Original Diesel
Unknown or Legendary
MassSuperSkunk
Unknown or Legendary
Super Skunk
Sensi Seeds
Skunk Nr1
Sensi Seeds
Skunk Nr1
The Seed Bank
Skunk Nr1
Cultivators Choice
Afghanistan Indica
Original Strains
Mexico Sativa
Original Strains
Colombia Sativa
Original Strains
Afghanistan Indica
Original Strains
Chem Dawg
Unknown or Legendary
Indica
Original Strains
DNL
Unknown or Legendary
RFK
Unknown or Legendary
Skunk
Unknown or Legendary
Skunk Nr1
Cultivators Choice
Northern Lights
Unknown or Legendary
Lemon Larry
Unknown or Legendary
Ultimate Chem 08
Thunderfudge
Ultimate Chem
Unknown or Legendary
Chem 91 Skunk VA
Clone Only Strains
Chem Dawg
Unknown or Legendary
Sour Diesel
Unknown or Legendary
Larry OG Kush
The Cali Connection
OG Kush
Clone Only Strains
SFV OG Kush
The Cali Connection
SFV OG
Clone Only Strains
OG Kush
Clone Only Strains
Afghani Nr1
Sensi Seeds
Afghanistan Indica
Original Strains
Afghanistan Indica
Original Strains
OG Kush
Clone Only Strains
Ultimate Chem
Unknown or Legendary

Growing Sour Larry BX1: 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 Sour Larry or Ultimate Chem 08 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.

Sour Larry BX1 FAQ

How long does Sour Larry BX1 take to flower?

Sour Larry BX1 typically flowers in around 65 days after switching to a 12/12 light schedule. Individual phenotypes vary, so judge harvest readiness by trichome color, not the calendar.

Is Sour Larry BX1 an indica or a sativa?

Sour Larry BX1 is listed as indica/sativa.

What are the parents of Sour Larry BX1?

Sour Larry BX1 was bred from Sour Larry × Ultimate Chem 08 by Thunderfudge.

What environment does Sour Larry BX1 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.

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Facts compiled from public breeder listings. Growing Sour Larry BX1? A structured journal — with your feedings, readings, and photos — is how you find what THIS cut actually wants.

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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.