Project 4516
Also known as: 4516
Breeder: Grandiflora Genetics
Project 4516 is an indica-dominant hybrid bred by Grandiflora Genetics in Oakland, California. It is recognized for its near-black purple coloration, dense resin-heavy flowers, and a complex chemical-fuel/sweet-dough nose. The strain helped establish Grandiflora's reputation in the modern exotic market and has been used as a parent in over 42 documented crosses. It bridges the gap between candy-gas and heavy-OG profiles, appealing to both connoisseurs and extractors.
Lineage & Genetics
Cross: Gelato 45 x Platinum Puff
Gelato 45 is a phenotype from the Gelato line (Sunset Sherbet x Thin Mint Cookies) contributing creamy sweetness and balanced potency. Platinum Puff (Platinum OG x Grateful Puff) brings raw chemical fuel, OG-lineage sedation, deep resin density, and funky terpenes with vibrant purple coloration from the Grateful Puff side.
Lineage Dispute
SeedFinder lists lineage as '(probably)' since Grandiflora has never officially confirmed genetics. Platinum Puff is widely cited as Platinum OG x Grateful Puff, though some sources use 'Grateful Breath' instead of 'Grateful Puff.'
Terpene Profile
beta-Caryophyllene — Spicy, peppery warmth
Limonene — Bright citrus, lemon zest
Linalool — Floral, lavender sweetness
Aroma: A pungent, volatile blend of sharp chemical fuel, ammonia, floor cleaner, sweet dough, and dark berries with an underlying earthy gas. The nose is loud and layered — described as walking into a pastry shop with a diesel truck idling outside.
Flavor: Sweet, fruity, sugary candy on the inhale with a gassy, minty, flowery-earth exhale. Some users report a creamy gelato quality with a sharp chemical-fuel finish.
Effects & Experience
Onset: Fast and hard-hitting. Immediate cerebral euphoria with a blast of uplifting tingles.
Initial lifted happiness transitions into a progressively heavier full-body relaxation. Deeply stoney and tranquilizing — weighted calm builds until fully at ease from head to toe. Not a daytime strain for most users.
Duration: Long-lasting. The body sedation persists well after the initial head high fades.
Commonly Reported Uses
Growing Characteristics
Grow Tips: Calcium and Magnesium hungry during transition — keep Nitrogen steady until week 5. Defoliate at days 21 and 42 for light penetration. Very tight bud structure demands low humidity in late flower to prevent mold. Tight internodes require careful canopy management. Deep purple colors and heavy resin develop most rapidly in the final two weeks. Plan headroom for the 2x stretch. Wash data: 3.5-4.5% fresh-frozen yield; press at 170-180°F for greasy cold-cure badder. Light color despite purple flower.
History & Origin
Developed by Grandiflora Genetics, an Oakland-based breeding group, dating back to the early 2010s. Project 4516 put Grandiflora on the global map as a benchmark for modern exotic hybridization. The cultivar became a foundational parent plant for the gas-heavy, purple exotic movement. SeedFinder documents 42 direct descendants, making it one of the most prolific breeding parents in the modern era.
Awards & Recognition
- ●Bubble Bath (The Soap x Project 4516, by Lit Farms) won 1st Place at the Emerald Cup Awards 2023
Notable Crosses
Strains bred using Project 4516 as a parent:
Sources & References (7)
- https://seedfinder.eu/en/strain-info/project-4516/grandiflora-genetics/genealogy
- https://www.strainpedia.com/project-4516/
- https://www.hytiva.com/strains/hybrid/project-4516
- https://www.getseedsrighthere.com/product/project-4516-clone/
- https://www.allbud.com/marijuana-strains/indica-dominant-hybrid/project-4516
- https://coloradoharvestcompany.com/strains/project-4516/
- https://www.sonomaseeds.com/cannabis-seeds/project-4516-strain-feminized-marijuana-seeds/
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