SPG Breeding Line 3 by Alpine-Seeds

SPG Breeding Line 3 strain photo
Type mostly sativaCross Sweet Chunk BX3 × Sweet Pink Grapefruit

Growers reach for SPG Breeding Line 3 as a sativa-leaning option, a cross of Sweet Chunk BX3 × Sweet Pink Grapefruit out of Alpine-Seeds. The environment targets below are the same stage-by-stage bands the Cultivar journal grades real SPG Breeding Line 3 grows against.

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Similar strains

SPG Breeding Line 1Alpine-Seeds · ±63 daysSweet Tooth 4Alpine-Seeds · ±62 daysSweet Pink GrapefruitAlpine-Seeds · ±65 daysSweet Chunk BX3Alpine-SeedsSweet Chunk BX2Alpine-SeedsSweet Chunk BX1Alpine-Seeds · ±63 daysAuto Caramelo MangoCartel Seeds · ±63 daysAuto Demon MassMr. Hide · ±65 daysAuto Future #1Anesia Seeds · ±67 daysAuto Haze XXLCartel Seeds · ±77 daysAuto Mazar BlueMr. Hide · ±70 daysAuto Strawberry BananaAnesia Seeds · ±74 daysAll Alpine-Seeds →
BreederAlpine-Seeds
Typemostly sativa
EnvironmentIndoors
LineageSweet Chunk BX3 × Sweet Pink Grapefruit

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🧬 Explore the family: Sweet Chunk BX3 · Sweet Pink Grapefruit

Ancestry Pedigree

Sweet Chunk BX3
Alpine-Seeds
Sweet Pink Grapefruit
Spice of Life Seeds
Sweet Chunk BX2
Alpine-Seeds
Sweet Pink Grapefruit
Spice of Life Seeds
Sweet Chunk BX1
Alpine-Seeds
Sweet Pink Grapefruit
Spice of Life Seeds
Grapefruit
Clone Only Strains
Indica Sativa
Original Strains
Unknown Strain
Original Strains

Growing SPG Breeding Line 3: 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 Sweet Chunk BX3 or Sweet Pink Grapefruit 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.

SPG Breeding Line 3 FAQ

Is SPG Breeding Line 3 an indica or a sativa?

SPG Breeding Line 3 is listed as mostly sativa.

What are the parents of SPG Breeding Line 3?

SPG Breeding Line 3 was bred from Sweet Chunk BX3 × Sweet Pink Grapefruit by Alpine-Seeds.

What environment does SPG Breeding Line 3 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 SPG Breeding Line 3? 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.