How to Grow Mint Without It Taking Over Your Garden

Contain mint in pots or create underground barriers to prevent its aggressive spreading while still enjoying fresh herbs for cooking and drinks.

1. Pot It Up First. Plant mint in pots at least 12 inches wide and deep. Use drainage holes and quality potting soil. This completely prevents spreading while allowing the plant to thrive. Place containers on patios, decks, or sink them into garden beds while keeping the rim 2 inches above soil level.
2. Build Your Defense Line. Dig a trench 18 inches deep around your desired mint area. Insert rigid plastic edging, metal strips, or concrete blocks vertically, leaving 2 inches above ground. Backfill and compress soil firmly. This creates an underground fence that stops root runners from escaping.
3. Establish Mint's Territory. Build a raised bed with solid sides or use a large buried container like a whiskey barrel with the bottom removed. Fill with quality soil and plant mint varieties here. The physical boundaries keep mint contained while giving it room to spread within limits.
4. Harvest and Prune Relentlessly. Cut mint stems frequently for kitchen use, removing flower buds before they develop. Trim runners that attempt to escape monthly. Harvest encourages bushy growth rather than spreading, and removing flowers prevents seed dispersal to other garden areas.
5. Stay Vigilant Year-Round. Walk your mint area weekly, pulling any shoots that escape containment. Check barrier edges for gaps or damage twice yearly. Divide overcrowded container plants annually in spring, discarding excess rather than planting elsewhere.