Arborvitae pH Levels

Acidity and Alkalinity

• The pH of soil refers to its acidity or alkalinity. Acidic soil has a pH of about 6.5 or below, while a pH above around 7.5 is alkaline. The range in between is considered neutral. If you are unsure of the pH level of your soil, the best way to find out is to obtain a soil testing kit from your nearest university extension office. The test results will include pH and nutrient levels as well as recommendations for soil amendments to improve your soil.

Arborvitae and pH

• Arborvitae prefers soil with a pH somewhere between 6 and 8, with neutral soil being ideal. These plants are hardy enough to survive in less than ideal conditions, but seldom reach their full potential in soil that is excessively acidic or alkaline. If you have acidic soil, you can raise the pH by incorporating lime into the soil. Alkaline soil can be amended with sulfur.

Other Conditions

• Arborvitae is moderately drought-tolerant, but prefers moist and well-drained soil. Drainage is important, so avoid locations with wet, waterlogged soil. Arborvitae fares poorly in salty soil as well. Look for a location with deep, rich loam or sandy loam soil and ample sunlight exposure. Arborvitae can tolerate partial or dappled shade, but will not do well in deep shade.

Considerations

• Certain arborvitae cultivars may have slightly different preferences and requirements, so consult with a local expert who can help you choose shrubs that are just right for the conditions in your backyard. Arborvitae is generally adapted to USDA hardiness zones 3 through 7.