Water. Give newly planted perennial herbs regular watering (once established, most tolerate some drought). Annual herbs such as basil need regular water throughout the growing season. Mint prefers slightly moist soil.
Fertilizer. Most herbs appreciate occasional supplemental feedings during the growing season; use an organic granular fertilizer. For ‘Kieffer’ lime, use a plant food formulated for citrus.
Harvest. For most: Snip fresh new growth as needed. For lemongrass: Cut off the thick, bulbous stems just above the crown (ground level); peel off outer sheath and use the bottom third of the stem in cooking.