Grow Mentha spicata (Spearmint) for a fresh, bright mint flavor and a tough, easy perennial habit. You will get upright stems of bright green, fragrant leaves and airy spikes of small lilac to pink to white flowers in summer that draw in pollinators. In good conditions it can reach about 12-36 inches tall and spread quickly, making it useful where you want a mint patch or a moist-area groundcover.
Plant in full sun to part shade in rich soil that stays evenly moist. Spearmint adapts to many soil types but performs poorly in dry ground, especially in hot weather. Water during dry spells, and mulch to help hold moisture. For the best leaf quality, keep plants growing steadily and harvest regularly by snipping stems above a leaf set; new shoots will refill fast.
Because spearmint runs by rhizomes and can spread aggressively, you will have the easiest control in a container (or with a deep edging barrier). If you plant it in the ground, choose a spot where its spread is acceptable and cut back wandering shoots during the season. After flowering, shear or cut plants back to encourage fresh, leafy regrowth.
In winter, growth dies back and returns in spring. Divide crowded clumps every few years to refresh vigor. Spearmint is a dependable herb for teas, sauces, salads, and garnishes, and it also makes a fragrant addition to edible and pollinator plantings.