RIFF – Subway Scientist (Granddaddy Purple) Strain

This strain is a part of our 420 Legends 🏆

This 420 Month, we’re celebrating the greatest cannabis strains of all time. We’ve narrowed down the list to 8 pillars of pot culture, each selected for their incredible genetics, numerous awards, and amazing contributions to the world of weed.

All month long, the purchase of any 420 Legends strain is a vote to choose the best of the best. Check back every week to see who is in the lead! At the end of April, we’ll tally the votes and find our champion: to celebrate, the winning strain will go on sale! 🎉

Want to see which other kings of cannabis made the cut? Check out our full breakdown here!

Known as the king of “purple” strains, this bud is a legend no matter what name it chooses: Granddaddy Purple, Gridlock, Grand Daddy Purps, or GDP. This bud defines what it means to be an indica: heavy, smooth, and body-melting, it’s a mainstay in every dispensary and stoner stash.

Renowned far and wide, GDP is one of the most popular strains on the West Coast. It’s a cross of Purple Urkle and Big Bud, two 80s indicas known for their powerful body highs. Some people say that GDP shares a striking resemblance to Grape Ape, or that they might even be the same strain—but others say that there’s just confusion about the strains’ similar lineage and look. The jury’s still out on how close they really are!

In 2003, this strain was introduced to the California cannabis scene by Ken Estes himself—but you might know him better as the “Medicine Man.” Today a famous breeder, Ken Estes began his journey with cannabis after a motorcycle accident left him paralyzed from the waist down. As he delved into cannabis’s therapeutic properties, he became an activist for medical marijuana and founded the Granddaddy Purp Collective: an organization with a mission of helping people find comfort and relief through cannabis.

As a “purple” strain, GDP’s buds are a deep, rich violet accented with enticingly bright orange pistils and a frosting of trichomes. This bus is famous for its smell and taste: on the inhale, we’re hit with its signature aroma of grapes and sweet wild-berries.

RIFF’s offering of GDP is just what we’d want out of this legendary bud, and more—their Subway Scientist pre-roll even took home 1st place at the Canadian Cannabis Awards in 2019!


THC Content   Very High
Indica / Sativa    80% / 20%
CBD Content    0-1 %


Shop RIFF Subway Scientist



The Effects

Toke slow and steady with this strain. GDP is famous for its classic, super heavy indica effects, leaving you glued to your couch all evening long. With such a throwback high, we love to pair this bud with some trippy tunes—is tonight going to be a classic like Pink Floyd, or are we going to experiment with some King Gizzard & the Lizard Wizard?


The Grower

Aphria in Leamington, Ontario

Strain Name

Granddaddy Purple, GDP, Gridlock, Grand Daddy Purps


Indica-Dominant Hybrid

Terpene Profile

  • Beta-Caryophyllene
  • Myrcene
  • Limonene
  • Linalool
  • Beta-Pinene

RIFF Subway Scientist Reviews

Top RIFF Subway Scientist Review on Leafly:

“Great strain for relaxation, stress relief and sleep. Everything just melts away leaving you feeling calm and mellow and a bit sleepy.”

v …. k, 5 stars

Top RIFF Subway Scientist Reviews on Lift.co:

Best strain i have had!!

this granddaddy purp is quite delicious and pretty powerful. the cultivation of their buds are excellent with glorious vibrant hairs covering the entire bud … hands down my personal favorite”