• Many herbs require similar soil conditions for healthy growth.kitchen herbs image by PhotographerOne from Fotolia.com
  
  Soil composition is important to soil health, and healthy soil produces strong herbs that grow vigorously. The majority of herbs grow best under similar soil conditions, according to Ray R. Rothenberger of the University of Missouri. The three attribute types needed to obtain these soil conditions are organically amended, balanced pH and appropriately drained.
  
  

Organically Amended Soils

• According to the West Virginia University Extension Service (WVUES), soil does not need added fertilizer, as highly fertile soil produces "excessive amounts of foliage with poor flavor." Rotheberger recommends only the use of organic peat moss or compost soil amendments. Organic amendments will not upset the balance inherent in soil. Many fertilizer- and pesticide-contaminated soils are treatable by spreading and incorporating organic matter within the soil. Organic matter aggregates add natural plant and animal residues necessary for soil health, and promote the flourishing of soil microorganisms that break down contaminants.
  
  

Balanced Soils

• The 0-14 pH balance scale measures from acid to alkaline. Balanced, or neutral, soils in the 6.5-7.0 pH range are appropriate for most herbs, according to Rothenberger. Added limestone descreases soil acidity, while added sulfur decreases soil alkalinity. Maintaining soil pH levels will ensure the healthy development and growth of herbs.
  
  

Well-Drained Soils

• Most herbs prefer well-drained soils, according to Rothenberger. Some herbs can tolerate moist soils, but soils that drain well will promote the best herb growth and flavor. Building raised beds or container gardens for proper soil drainage is necessary if well-drained soil is unavailable. Incorporating organic matter and balancing soil pH will aid in proper soil drainage conditions. Proper drainage may also require a soil amendment such as sand.