Lemongrass
Cymbopogon citratus
 
The queen of lemony herbs is a fast growing, tender, shrub. The glossy green leaves exude an intense lemon smell at the slightest touch. Commonly used for flavoring soups and seafood dishes. The bottom 5 in. of each leaf stalk contains the most flavor. Great in a container.
 
Annual Herb
Full sun
Grows 3-5 ft. tall 
Spacing 18-24 in.
Zone 8