Or use a packaged general-purpose potting soil. This plant tends to get leggy and unattractive with age. Pinch growth tips for a bushier plant. Dry soil or high soluble salts may damage roots, causing plant to die back. In spring or summer take stem cuttings or divide the plant.
Plantlets start easily.
When touched, the plant gives off a distinctive smell. Clusters of small inconspicuous pale lavender, tubular flowers are produced in summer. I have heard this plant referred to as Mexican or Cuban Oregano.