Offered by Tian . I have some lemon grass here in a pot. It is much like sugar cane, but not 15 feet tall. I bought some for a Thai soup and rooted the bases, now its about a foot tall. It grows well in rich garden soil, lots of compost.
Regular peat is too acid and lacks in nutrients.
Rotten leaves and kitchen waste is rich and balanced. It is, however, a tropical. You will need to keep it indoors if you get hard frosts, Zone 9 is the likely northern limit in the East. It survives the winter here in the San Francisco Bay Area, but likes LA better. We get cool rainy winters, but little or no frost.