Plant library · Herbs
Mentha spicata
Spearmint is a vigorous perennial herb that brings a soft, leafy presence to the edge of an edible bed or a dedicated container grouping. At about 2 feet tall, it stays within easy picking height, but its spreading habit makes it a plant to give a defined boundary from the outset. Site it where frequent harvesting is convenient and where its expanding stems will not crowd slower neighbors.
Use spearmint beside a kitchen path, patio door, or the working edge of a raised bed, where regular access makes late-spring through early-fall harvest simple. A large pot, trough, or edged bed keeps the planting legible in a plan and separates it from open vegetable rows. It can sit near cabbage, broccoli, tomatoes, peas, or lettuce; keep parsley in a different section of the herb bed.
Plant on 2-foot centers, measured from one plant’s crown to the next. Each plant can ultimately occupy about 3 feet in width, so neighboring clumps will meet and overlap unless the bed edge, container wall, or a clear maintenance strip stops the spread. For a single plant, reserve a 3-foot-wide zone and avoid tucking it between permanent, tightly spaced plants.
Place spearmint in partial sun and keep moisture regular, especially where paving, walls, or container sides speed drying. Its placement can be flexible across the garden, but the root zone should not be treated as a dry, low-maintenance corner. In-ground plants are best assigned to a bed with a deliberate edge or other root boundary; containers offer the clearest control of spreading runners.[1][2][3]
The main leafy harvest window runs from late spring into early fall. Flower spikes arrive from summer into early fall, adding pollinator activity while changing the plant from a low leafy mound into a taller, more open accent. Regular picking encourages bushier growth, and cutting plants back after flowering refreshes vegetative growth for the remaining season.[1][2]
Treat containment as part of the planting design, not an afterthought. Spearmint spreads by rhizomes and stems that can root where they touch the ground, so an unbounded planting can blur path edges and move into adjacent crops. A deep container, a raised bed with a managed perimeter, or a dedicated edged strip makes its mature footprint easier to maintain and replant around.[1][2][3]
Editorial content updated 2026-07-20.