Michigan has one of the deepest cannabis cultures in the country. It is home to the longest running cannabis rally in the US, a large adult use market and an active community of home growers who meet up, trade notes and show off their harvests. If you want to plan your 2027 around cannabis events in Michigan, this guide covers the anchor event of the year, the kinds of events that fill the rest of the calendar and how to stay within the law while you enjoy them. Every event listed here is for adults 21 and older, and every date should be checked with the organizer before you travel.

The anchor event: Hash Bash, April 3, 2027

Hash Bash is the event most people think of first. It began on April 1, 1972, after the arrest and ten year sentence of the poet and activist John Sinclair for two joints sparked protests in Ann Arbor. A famous rally for Sinclair in 1971 drew musicians including John Lennon, and the Michigan Supreme Court later threw out the law used against him. The first Hash Bash grew out of that moment.

Today Hash Bash is a free rally held on the first Saturday of April at high noon on the University of Michigan Diag. In 2027 that falls on Saturday, April 3. Expect speakers, activists, music and a big crowd. The rally itself usually runs about an hour and a half, while the rest of the weekend often fills with ticketed events around town.

A few things to know:

• It is free. No ticket is needed for the rally on the Diag.
• Campus rules apply. The Diag is university property, and consumption on campus is prohibited. Public consumption is also illegal under state law.
• Side events change. A street fair has historically run nearby, but its status for 2027 was not confirmed when we wrote this. Check before you plan around it.
• Book early. Ann Arbor hotels fill quickly on Hash Bash weekend.

The rest of the Michigan calendar

Outside of April, Michigan cannabis events tend to fall into a few types. Specific 2027 dates were not published when we checked, so use these categories to search organizer sites and local listings.

Licensed temporary events

Michigan allows licensed temporary marijuana events where adults can buy and in some cases consume at an approved venue. The municipality must allow them, and organizers need state approval. These are the only events where on site sales and consumption are legal. Look for the license details on the event page.

Cannabis cups and competitions

Michigan regularly hosts cannabis cups where brands and growers enter flower and concentrates for judging. Some include categories for home growers or people who want to judge. Rules about who can enter change, so read the entry terms carefully.

Home grow meetups and classes

Grow shops, community groups and some cannabis businesses host classes on soil, lighting, pests and harvest timing. These are usually small, low cost and focused on learning. They are a good fit if you grow at home under Michigan’s limits, which allow adults to grow up to 12 plants per household. Michigan also lets adults keep up to 10 ounces at home plus what their own plants produce on the premises, with anything over 2.5 ounces locked away.

Industry trade shows

Michigan also hosts business focused expos and conferences. These are aimed at licensees, vendors and job seekers. Many do not allow consumption at all and some are closed to the general public.

4/20 and harvest season events

April 20 and the fall harvest bring parties, sales and educational events across the state. In 2027, April 20 falls on a Tuesday, so expect some celebrations to move to the weekend before or after.

Quick planner

When	What	Where	Check
Sat Apr 3, 2027	Hash Bash rally	University of Michigan Diag, Ann Arbor	Organizer site for speakers and side events
Apr 2027	4/20 events	Statewide	Venue license and age rules
Spring and summer	Grow classes and meetups	Grow shops and community spaces	RSVP and location
Fall 2027	Harvest and cup events	Varies	Entry rules and license details

How to stay legal at events

• Bring ID. Every event worth attending will check that you are 21 or older.
• Buy only from licensed sellers. Do not buy from people selling out of a bag or a car.
• Consume only where allowed. Outside a licensed consumption area, public use is illegal.
• Do not drive impaired. Plan a ride home before you go.
• Keep it in Michigan. Do not carry cannabis across state lines when you leave.

Making the most of an event as a grower

Events are a great place to learn. Bring a notebook. Ask growers about their setups, their favorite genetics and the problems they ran into this year. Many events have speakers who cover practical topics like pest control or drying and curing. If you want to try a new strain in your next grow, check our Michigan seed page for options suited to the state’s climate and rules.

Getting around Ann Arbor on Hash Bash weekend

Parking near central campus is limited and fills early on rally day. Many visitors park farther out and walk, or use local buses and rideshare. Dress for the weather, since early April in Michigan can bring sun, rain or snow in the same weekend. Bring water, keep your belongings close in the crowd and agree on a meeting spot with friends in case phones lose signal.

Enjoy cannabis culture responsibly

Cannabis is only legal for adults in some states, and the rules on possession, public use and home growing change from place to place. Kind Seed Co sells only to adults 21 and older, and nothing here is an invitation to break the law where you live. If you want to know what is allowed in your state, start with our guide to the legal requirements for growing weed plants in your state. Never drive after using cannabis, keep it away from kids and pets, and respect anyone who chooses not to partake. This article is general information about culture and history. It is not legal advice and it is not medical advice.

Frequently asked questions

When is Hash Bash 2027?

Hash Bash is scheduled for Saturday, April 3, 2027, at noon on the University of Michigan Diag in Ann Arbor. Confirm with the organizer before you travel.

Can you smoke at Hash Bash?

The Diag is university property and public consumption is illegal in Michigan, so consumption is not allowed even though the event celebrates cannabis.

Are there legal consumption events in Michigan?

Yes. Licensed temporary marijuana events can allow sales and consumption at approved venues when the city allows it.

How many plants can I grow at home in Michigan?

Adults 21 and older can grow up to 12 plants per household under state law. Check local rules on visibility and security.

Final thoughts

Michigan’s cannabis calendar starts with Hash Bash on April 3, 2027 and fills out with licensed events, cups, grow classes and trade shows through the year. Check every date with the organizer, bring ID, buy only from licensed sellers and enjoy the events responsibly.

Ready to start

Browse the full range in the Kind Seed Co shop or go straight to marijuana seeds michigan. Kind Seed Co sells only to adults 21 and older. Always follow the cannabis laws where you live.