Blue Water Bridge Cannabis Guide: Port Huron, Michigan

Port Huron sits where Lake Huron narrows into the St. Clair River, a city of roughly 28,000 that has been a shipping and border crossing point since long before the Blue Water Bridge spans went up. Thomas Edison spent his childhood here, and the depot museum where he worked sits directly beneath the bridge approach. Every July the Port Huron to Mackinac sailboat race fills the Black River with boats and the downtown with crowds for Boat Night, which is the single busiest weekend of the local year.

The city permits licensed cannabis retail, including a JARS Cannabis store, serving both St. Clair County residents and the steady traffic that comes off I-94 and I-69 as they terminate at the border. Michigan rules apply as everywhere: 21 and over with a government photo ID, no registry, no residency requirement, 2.5 ounces in public and 12 plants per household. Prices sit near the state average, which is the lowest in the country.

The border is the thing to understand here. Canada legalized cannabis nationally in 2018 and Michigan legalized it the same year, and it is still a federal crime to carry any amount across the Blue Water Bridge in either direction. Customs officers on both sides ask, and a positive answer creates serious problems. Retail sits on the local arterials - the Pine Grove Avenue and Twenty-Fourth Avenue corridors, Military Street through the older core, and the Fort Gratiot commercial strip north near Birchwood Mall - all of them minutes from the bridge but none of them a legal supply line across it.

Michigan voters approved the Michigan Regulation and Taxation of Marihuana Act in November 2018, and the first adult-use sales rang up on December 1, 2019. Seven years on, this is one of the largest legal markets in the country: licensed stores moved roughly $1.48 billion in adult-use product in the first six months of 2026 alone, and the all-time total passed $16.5 billion by the end of June. Michigan also does something few mature markets manage - it stays cheap. Cannabis Regulatory Agency figures put the average adult-use ounce of flower at $59.85 in February 2026 and $58.18 in June, the lowest statewide average in the nation.

Buying is simple. Bring a government ID showing you are 21, walk into any CRA-licensed retailer, and pay. No residency requirement, no registry, no card. The catch is geography: roughly three-quarters of Michigan's municipalities opted out of hosting cannabis businesses, so stores bunch heavily into the communities that said yes - Detroit, Ann Arbor, Ypsilanti, Bay City, Traverse City, the Indiana-border strip around New Buffalo - while whole tiers of suburbs have none. Possession is capped at 2.5 ounces on your person and 10 ounces at home, with anything past 2.5 ounces stored in a locked container. Adults may grow up to 12 plants per residence out of public view.

Taxes are what changed. On top of the original 10% adult-use excise and Michigan's 6% sales tax, House Bill 4951 - the Comprehensive Road Funding Tax Act signed October 7, 2025 - added a 24% excise tax on wholesale transfers of adult-use marijuana starting January 1, 2026. Growers and processors pay it before product ever reaches a shelf, and shoppers absorb it in the retail price. Retail prices still fell year over year, but license counts and store closures moved the wrong way, and by August 2026 both chambers in Lansing had repeal bills on file.

Michigan has a deep bench of homegrown brands, which matters more here than in states dominated by out-of-state operators. Lume Cannabis Co. is the biggest vertically integrated name in the state, though its house-grown flower is sold only inside its own roughly forty stores rather than on other retailers' shelves. Grasshopper Farms grows sun-grown outdoor flower on acreage near Paw Paw and prices accordingly. Mitten Extracts and MKX Oil Co. are two of the most widely stocked vape lines on Michigan shelves. Redemption Cannabis donates a share of revenue to cannabis-conviction relief work and sells statewide. Common Citizen and Glorious Cannabis Co. round out the flower and concentrate categories in most larger stores. Ask what was harvested most recently rather than what has the highest number printed on the jar.

Three things define Michigan cannabis in 2026. First, the 24% wholesale tax that landed January 1 has not raised what lawmakers promised - collections ran roughly $70 million behind pace in the first third of the fiscal year - which is why Senate Bill 810 was filed in February and House Bill 6224 followed in August. Second, the market is consolidating: monthly sales have held near $250 million, but active retail licenses and store counts are declining for the first time since 2019 as thin margins push weaker operators out. Third, on-site consumption is still a three-venue market - Hazel Park, Kalkaska and Kalamazoo - though Detroit has authorized up to 35 lounge licenses of its own. Shoppers are searching by price per ounce and by store rather than by brand.