Spearmint
Mentha spicata

Hardiness: Zones 5 to 9
Plant type: Herbaceous perennial
Height: 1- 2'
Spread: 1- 2'
Sun: Full sun to part shade
Water: Medium 
Bloom time: June to September
Bloom color: Pink or white
Soil:  Well draining, moist, rich garden soil.

Notes: Excellent for container gardening, spreads aggressively otherwise.

More information on this plant here.