A bill to establish a distinct regulatory structure for sun-grown marijuana, with lowers costs, has passed both chambers of the Maine Legislature and is now on its way to Governor Janet Mills for consideration.
(Photo credit: Danaan/stock.adobe.com).
The legislation was approved by the Senate in a 21 to 14 vote, after clearing the House 110 to 35. The measure defines “sun-grown cultivation” and “sun-grown cultivator” under state law, applying to those who grow marijuana primarily using natural sunlight and limited artificial lighting.
The bill creates a separate licensing framework for outdoor cultivators, including significantly lower fees. For example, a Tier 4 outdoor cultivation license would cost $15,000 annually—half the cost of an equivalent indoor operation.
Under the proposed law, sun-grown caregivers would be allowed to grow up to 150 mature plants or use up to 2,500 square feet of canopy each year, expanding the current limits. Additional provisions include updated security requirements for cultivation facilities, a grace period for new employees awaiting ID card approval, and the elimination of yeast and mold testing requirements for adult-use marijuana.
Supporters say the measure promotes sustainability, lowers barriers for small growers, and reflects Maine’s agricultural roots. If signed into law, it would mark a significant shift in how the state regulates outdoor marijuana cultivation, and it would make Maine one of the only states with a designated license for sun-grown cannabis growers.
