Powered by Buddy
Menu
Powered by Buddy
Powered by Buddy
Menu
Powered by Buddy
Powered by Buddy
How do you want to shop?
River Rouge, MI — Jefferson Ave — 4/20 Deals & Specials
4/20 Deals at
Herbology
Jefferson Ave
Downriver Detroit’s cannabis destination on historic Jefferson Ave — your 4/20 starts here.
Celebrate 4/20 at Herbology Cannabis Co. on Jefferson Avenue in River Rouge, Michigan. Serving Southwest Detroit, Ecorse, Lincoln Park, Wyandotte, and the entire Downriver community — we’ve got limited-time deals on flower, vapes, edibles, concentrates, and more, right on the banks of the Detroit River.
On Historic Jefferson Ave • Near I-75 & I-94 • Along the Detroit River • Serving Downriver & Southwest Detroit
4/20 Deals & Specials
Available at Herbology Jefferson Ave in River Rouge. Limited-time offers while supplies last.
Spend & Save
- Spend $50, Save $5
- Spend $100, Save $15
- Spend $150, Save $30
Discounts applied before tax. Cannot be combined with other offers.
$420,000 in Free
Product Giveaways
With a minimum purchase of $50 (pre-tax).
*While supplies last. Restocked daily.*
BOGO Flower
Buy an ounce of deli flower and get a half-ounce free (same tier or lower).
Deli flower promotions apply only to products of equal or lesser value.
Free Weed for a Year
$200 in free product every month for a year.
Shop at Herbology Jefferson Ave between 4/13–4/20 to be entered into the drawing. In collaboration with our brand partners:
Giveaway entries require a qualifying purchase and do not guarantee a prize. Winners must respond within the stated claim period.
The 420 Afterparty
Shop 4/17–4/20 at Jefferson Ave and unlock savings good through April 30.
Spend $200 | 4/17 – 4/20
Get $30 Off 4/21–4/30 + Herbology Swag
Spend $100 | 4/17 – 4/20
Get $15 Off 4/21–4/30
Spend $50 | 4/17 – 4/20
Get $5 Off 4/21–4/30
Welcome to Herbology
Jefferson Ave
Located at 11481 W Jefferson Avenue in River Rouge, MI 48218, Herbology Cannabis Co. is a trusted destination for premium recreational cannabis along one of Southeast Michigan’s most storied corridors. Conveniently accessible from I-75, I-94, Fort Street, and Outer Drive, we proudly serve the Downriver Detroit area — including Ecorse, Lincoln Park, Melvindale, Southwest Detroit, Delray, and Wyandotte.
Whether you’re on your way to Belanger Park, taking in the scenic stretch of the Detroit River International Wildlife Refuge, or commuting between Detroit and the suburbs, Herbology on Jefferson Ave is an easy, welcoming stop. Order ahead online and pick up quickly, or come in and browse our modern dispensary at your own pace.
Your Downriver Detroit Cannabis Community Hub
Herbology Jefferson Ave is more than a dispensary — it’s a community anchor for safe, educated access to high-quality cannabis in Southeast Michigan. We carry a wide selection of lab-tested recreational cannabis sourced from Michigan’s most respected brands: top-shelf flower, pre-rolls, vape cartridges, edibles, concentrates, topicals, and CBD wellness products. Every item on our shelves is tested for quality, potency, and safety so you can always shop with confidence.
Our knowledgeable budtenders are here for everyone — whether you’re a first-time visitor who doesn’t know where to start, or a longtime cannabis consumer looking for something specific. We take the time to listen, educate, and find the right fit for your lifestyle. Frequent promotions, daily deals, and a loyalty rewards program mean you always get more value with every visit.
Come experience why the Downriver community and beyond choose Herbology Jefferson Ave as their go-to cannabis destination in Southeast Michigan.
Proudly Serving — Ecorse • Lincoln Park • Melvindale • Southwest Detroit • Delray • Wyandotte • River Rouge
Near I-75 • I-94 • Fort Street • Outer Drive • Jefferson Avenue
Herbology Has 7 Michigan Locations
4/20 deals are available at every participating Herbology dispensary in Michigan.
See All Locations & Deals →Got Questions?
Everything you need to know about 4/20 at Herbology Jefferson Ave.
Where is Herbology Jefferson Ave located?
Do you serve the Southwest Detroit and Downriver communities?
When do 4/20 promotions start at Jefferson Ave?
Can I order online for pickup at Jefferson Ave?
Do giveaways and Afterparty deals apply here?
Disclaimer: For use only by adults 21 years of age or older. Keep out of reach of children. Do not drive or operate machinery under the influence of marijuana. Marijuana use during pregnancy or breastfeeding may be harmful. National Poison Control Center: 1-800-222-1222.
Offers valid only at participating Herbology locations in Michigan unless otherwise noted. Valid government-issued ID required. Promotions are available only on listed dates and while supplies last. Limits, exclusions, and minimum purchase requirements may apply. Discounts are applied before tax at checkout and cannot be combined with other discounts, rewards, coupons, loyalty redemptions, or promotional pricing unless expressly stated. Free items may ring at $0.01 where required by state regulations. Limit one free item or giveaway entry per customer per day unless otherwise specified. No substitutions.
Deli flower promotions apply only to products of equal or lesser value. Online-only promotions apply only to pickup or delivery orders placed through the Herbology website. Delivery availability varies by location. Giveaway entries require a qualifying purchase and do not guarantee a prize. Winners must respond within the stated claim period. Gift guide recommendations and third-party brand promotions may vary by store and are subject to availability. Herbology reserves the right to modify or discontinue promotions at any time without notice. Void where prohibited.
Main Menu
Shop All
Category Menu