ChemMO by Gas Reaper

ChemMO strain photo
Type ruderalis/indica/sativaFlower ±67 daysCross South Bay Bessie × GMO Cookies

Growers reach for ChemMO as an indica-leaning option, a cross of South Bay Bessie × GMO Cookies out of Gas Reaper. 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 ChemMO grows against.

🌿 Start a ChemMO journal — free →

Similar strains

DeezRuntzGas Reaper · ±63 daysBessieCakeGas Reaper · ±63 daysMacaRuntzGas ReaperScarlet SunsetGas ReaperRoadkillGas ReaperErie SunsetGas ReaperAuto Amnesia GoldPyramid Seeds · ±67 daysAuto Blue-ToothReal Gorilla Seeds · ±67 daysAuto CBDV 1:1Seedsman · ±67 daysAuto Critical Ogre 'Big 'N Fast'Seedsman · ±67 daysAuto Critical +BSB · ±67 daysAuto Diablo XLBSB · ±67 daysAll Gas Reaper →
BreederGas Reaper
Typeruderalis/indica/sativa
Flowering time±67 days
EnvironmentOutdoors
LineageSouth Bay Bessie × GMO Cookies
DescendantsUnicorn Pops

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

🧬 Explore the family: South Bay Bessie · GMO Cookies · Unicorn Pops

Ancestry Pedigree

South Bay Bessie
Gas Reaper Genetics
Chem 91 Skunk VA
Clone Only Strains
Chemdog
Unknown or Legendary
Indica Sativa
Original Strains
Death-Star
Clone Only Strains
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
Afghanistan Indica
Original Strains
Chemdog
Unknown or Legendary
DNL
Unknown or Legendary
RFK
Unknown or Legendary
Skunk
Unknown or Legendary
Skunk Nr1
Cultivators Choice
Northern Lights
Unknown or Legendary
Purest Indica
Clone Only Strains
Sensi Star
Paradise Seeds
Mostly Indica
Original Strains
Creme De La Chem
Mephisto Genetics
Stardawg
Top Dawg Seeds
Chemdog
Unknown or Legendary
Tres Dawg
Top Dawg Seeds
Chemdog
Unknown or Legendary
Double Dawg
Unknown or Legendary
Chemdog
Unknown or Legendary
Afghanistan Indica
Original Strains
Afghanistan Indica
Original Strains
Chemdog
Unknown or Legendary
Chemdogging
Mephisto Genetics
Mostly Sativa
Original Strains
ChemD
Unknown or Legendary
Chemdog
Unknown or Legendary
GMO Cookies
Skunk House
Chemdog
Unknown or Legendary
GSC Forum Cut
Clone Only Strains
Girl Scout Cookies
Clone Only Strains
GSC Thin Mints
Clone Only Strains
OG Kush
Clone Only Strains
Unknown Strain
Original Strains
Hindu Kush Indica
Original Strains
F1 Durban
Unknown or Legendary
F1
Unknown or Legendary
Unknown Strain
Original Strains
Durban Poison
Unknown or Legendary
South Africa Sativa
Original Strains

Growing ChemMO: 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 South Bay Bessie or GMO Cookies 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.

ChemMO FAQ

How long does ChemMO take to flower?

ChemMO 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 ChemMO an indica or a sativa?

ChemMO is listed as ruderalis/indica/sativa.

What are the parents of ChemMO?

ChemMO was bred from South Bay Bessie × GMO Cookies by Gas Reaper.

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

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

Suggest an edit for ChemMO

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.