Be sure not to plant the herb any deeper than where it was growing in the container. Planting too deep may cause the roots to rot. Most herbs thrive best in well-drained soil, with a soil pH of 6.0 to 6.8 for optimum growth. The growing area should be tilled to a depth of 8 - 12 inches. Although herbs are somewhat drought tolerant, adequate soil moisture is required for normal growth.
Annual herbs require higher available soil moisture than perennial herbs.
Till the organic matter thoroughly into the soil. Heavy clay soils should be amended with compost, or pine bark or beds should be constructed to provide internal drainage. Amendment materials modify soil structure and texture. Fertilizing A proper nutritional balance is important for proper growth. Over fertilization causes succulent, or weak, growth.