Project 4516 by Grandiflora Genetics

Project 4516 is the kind of modern exotic that actually lives up to the hype. Bred by Mark over at Grandiflora Genetics, this strain exploded out of California's boutique market a few years back and never really left. The lineage is a straight-up powerhouse cross of Gelato 45 and Platinum Puff. The name itself is just a nod to standard breeding shorthand—"45" for the Gelato mom and "16" for the specific pheno selected from the hunt. Mark was on a mission to merge heavy, gas-soaked indica traits with sweet, dessert-like sativas, and after running massive pheno hunts and rigorous lab testing, he found a cut that consistently pushed between 25% and 30% THC.

In the flower room, Project 4516 is an absolute showstopper. It throws out dense, jagged buds that turn practically black and purple by week eight, contrasting heavily with a stupidly thick layer of white trichomes. It’s got that classic modern structure—tight internodal spacing and bag appeal that makes it a commercial grower’s dream. But it isn't just about looks. The terpene profile is a loud, aggressive collision of sweet candy, dark berries, and sharp, eye-watering diesel fuel from the Platinum OG and Grateful Puff ancestry. You barely have to squeeze a bud to get your fingers completely glued together.

When you light it up, it delivers exactly what the modern connoisseur wants. The high smacks you instantly with a cerebral rush, but before you can even process the euphoria, it melts down into your limbs and glues you to the couch. It’s strong enough that even high-tolerance smokers treat it with respect. Because the genetics are so dialed in, Grandiflora and other breeders have used Project 4516 as the backbone for a ton of newer crosses, like Ya Hemi. It’s proof that not all numerical-named hype weed is fluff; some of it is genuinely breeding gold.

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🧬 Explore the family: Platinum Kush · Gelato · Two Scoops · E85 · WAP · Ya Hemi · Blue 16 · Project 007 · Los Muertos · Kool Whip

Ancestry Pedigree

Growing Project 4516: 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 Platinum Kush or Gelato 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.

Project 4516 FAQ

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Facts compiled from public breeder listings. Growing Project 4516? A structured journal — with your feedings, readings, and photos — is how you find what THIS cut actually wants.

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