WALLED LAKE, Mich. (CBS Detroit) — An Oakland County marijuana dispensary is hoping to kick start blood and plasma donations in Michigan in response to a nationwide shortage.

The Greenhouse of Walled Lake is giving away a free pre-roll to anyone who shows they donated blood or plasma.

READ MORE: Grand Valley State University Extends Free Tuition To Students From Low-Income Homes

The “Pot for Plasma” initiative runs from Jan. 18 through Feb. 27. Anyone age 21 and older are eligible as long as they show proof.

READ MORE: Whitmer Urges Michigan Residents To Claim Free COVID-19 Tests From Federal Government

Click here for more information about the promotion.

MORE NEWS: Father, Twin 6-Year-Olds Die In Crash In Bay County

To donate blood, visit the American Red Cross website.

© 2021 CBS Broadcasting Inc. All Rights Reserved. This material may not be published, broadcast, rewritten, or redistributed.