Dr. Greenthumb's is the cannabis company of Cypress Hill's B-Real, born Louis Freese, named after the grower alter ego he introduced on a 1998 song. Its name hangs on five flagship dispensaries, four in California and one in Chicago. The company also licenses its name, genetics and packaging to operators in other states.
The store locator counted more than 155 retail partners across four states in 2026, and the company's own timeline calls this stage "the licensing era."
From Black Sunday to a 1998 alter ego
The story starts with the band. Cypress Hill formed in South Gate in 1988, and its 1991 debut went double platinum. Black Sunday debuted at No. 1 on the Billboard 200 in 1993, the year the company stamps on its footer: "Est. 1993."
The character came five years later. "Dr. Greenthumb" landed on Cypress Hill IV in 1998, casting B-Real as a mad-scientist grower. In 2004 he launched B-Real's Smokebox, which the company credits as an early cannabis-forward media platform.
The Smokebox still runs on BREAL.TV, next to The Dr. Greenthumb Show and High & Hungry. Past Smokebox guests include Joe Rogan, Mike Tyson, Wiz Khalifa, Tommy Chong and George Lopez.
Insane OG and a grower since 1995
The flagship genetics date to 2015, when B-Real developed Insane OG. The company calls it his signature strain and lists it as indica-dominant.
B-Real doesn't grow alone. He works with master grower Kenji Fujishima, a partnership that goes back to 1995, and the company says B-Real stays involved in cultivation decisions. Fujishima held the title of head of cultivation when the Arizona partnership launched in 2023.
The library has grown well past one cut. The licensing program offers partners Insane OG, LFG and more than 40 proprietary strains.
Sylmar first, then four California flagships
The first Dr. Greenthumb's dispensary opened in Sylmar, California, in August 2018. The company's timeline marks 2020 as its California expansion, and the 2026 locator lists four California flagships:
- Canoga Park, 20907 Roscoe Blvd, open daily 8 a.m. to 10 p.m.
- Fresno, 1264 N Wishon Ave, open daily 8 a.m. to 10 p.m.
- La Mesa, 8760 Campo Rd, open daily 7 a.m. to 9 p.m.
- Orcutt, 1604 E Clark Ave, Suite 101, open daily 9 a.m. to 9 p.m.
Each store displays its state license on the company's site.
Chicago on Ashland Avenue
Dr. Greenthumb's took its dispensary format to Illinois in 2024 with a Chicago flagship at 2200 N Ashland Ave. The company's timeline tags that year "Chicago & Beyond."
Illinois lists the store under a local operator. The state's adult-use dispensary roster, updated January 9, 2026, names Ellana, LLC as the licensee doing business as Dr Greenthumb's Chicago. The store opens at 10 a.m. Monday through Saturday and 11 a.m. on Sunday, closing at 8 p.m.
The Flower Shop builds the Arizona line
Arizona runs through The Flower Shop, which the company calls its first Arizona licensee. The partnership launched in November 2023 with strains hand-selected by B-Real and grown at The Flower Mine, a 100,000-square-foot cultivation facility in San Manuel.
The launch menu came in three tiers of 3.54-gram flower. Loyalty ran $25 with Peanut, Apple Turnover, Lemon Royale and Tahoe OG. Legacy carried Orange Monsoon, Jack Herer and Donny Burger. Unapologetic, at $45, carried Motor Breath, Gello and Soap. The drops hit The Flower Shop's Phoenix, Ahwatukee and Mesa stores first before going statewide.
The Arizona list kept growing. The Flower Shop's Dr. Greenthumb's page in 2026 lists flower including Georgia Petrol, Gelato 41, Kush Mints, Master Kush and Motor Breath, plus sugar wax, cartridges, all-in-one vapes and pre-rolls. It also lists The Flower Shop stores in Logan and Ogden, Utah.
Partners, not franchises
The licensing pitch is blunt: "We don't franchise. We partner." Dr. Greenthumb's runs separate programs for cultivators, manufacturers and retailers, and each partner needs an active state cannabis license and at least two years of operating experience.
Partners get the genetics, the brand name and B-Real's likeness, a full packaging system, four limited product releases a year and state compliance templates. B-Real commits to at least two appearances a year. Contracts typically run three years with renewal options, and a partner who locks in a territory gets it exclusively.
Where Dr. Greenthumb's sells in 2026
The locator splits the footprint in two. Five flagships carry the name on the door, and more than 155 partner stores carry the product: 105 in Arizona, 40 in Illinois and 11 in Utah, plus California.
The catalog covers flower, pre-rolls, vapes, concentrates and edibles, with the KANHA x Dr. Greenthumb's INSANE gummy as a named collaboration. B-Real remains founder in 2026 and stays involved in cultivation decisions, running the brand alongside BREAL.TV and a Cypress Hill career that has passed 20 million records sold.
For adults 21 and over.