G13 Genius by Brothers Grimm

G13 Genius strain photo
Type mostly indicaCross G-13 x Hash Plant F1 Hybrid × Genius

G13 Genius, from breeder Brothers Grimm, is an indica-leaning strain descended from G-13 x Hash Plant F1 Hybrid × Genius. The environment targets below are the same stage-by-stage bands the Cultivar journal grades real G13 Genius grows against.

🌿 Start a G13 Genius journal — free →

Similar strains

Apollo 11Brothers Grimm · ±59 daysGreen AvengerBrothers Grimm · ±60 daysCinderella XXBrothers Grimm · ±60 daysMatanuska ThunderBrothers Grimm · ±56 daysHashmasterBrothers Grimm · ±55 daysKiller QueenBrothers Grimm · ±61 daysAuto AnonyMASSCritical Mass Collective · ±75 daysAuto Candy CreamyPanoramix Genetics · ±77 daysAuto CriticalSeedmakers · ±65 daysAuto Cream MassMr. Hide · ±60 daysAuto Critical XXLApex Seeds · ±69 daysAuto Diesel MassMr. Hide · ±55 daysAll Brothers Grimm →
BreederBrothers Grimm
Typemostly indica
EnvironmentOutdoors
LineageG-13 x Hash Plant F1 Hybrid × Genius
DescendantsBanana Hash Plant

🌱 Get G13 Genius seeds →
Affiliate link — supports Cultivar at no cost to you.

🧬 Explore the family: Genius · Banana Hash Plant

Ancestry Pedigree

G-13 x Hash Plant F1 Hybrid
The Seed Bank
G-13
Unknown or Legendary
Indica
Original Strains
Hash Plant
The Seed Bank
Hash Plant
Unknown or Legendary
USA Indica
Original Strains
Hash Plant
Unknown or Legendary
Genius
Unknown or Legendary
Jack Herer
Sensi Seeds
Northern Lights Nr5
The Seed Bank
USA Mostly Indica
Original Strains
Original Haze
Cultivators Choice
Haze
Unknown or Legendary
Mexico Sativa
Original Strains
Colombia Sativa
Original Strains
Thailand Sativa
Original Strains
India Sativa
Original Strains

Growing G13 Genius: 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 G-13 x Hash Plant F1 Hybrid or Genius 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.

G13 Genius FAQ

Is G13 Genius an indica or a sativa?

G13 Genius is listed as mostly indica.

What are the parents of G13 Genius?

G13 Genius was bred from G-13 x Hash Plant F1 Hybrid × Genius by Brothers Grimm.

What environment does G13 Genius 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 G13 Genius and something looks off? Free AI photo diagnosis →

Facts compiled from public breeder listings. Growing G13 Genius? A structured journal — with your feedings, readings, and photos — is how you find what THIS cut actually wants.

Suggest an edit for G13 Genius

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.