Soil Science

Understanding soil structure, chemistry, and biology for healthier plants.

Soil pH: What Your Number Means and When to Change It
Soil Science

Soil pH: What Your Number Means and When to Change It

Your Puget Sound soil is already acidic, and most of the time that is exactly right. Learn when pH actually needs changing, which amendments work on which soil types, and how to stop chasing a number.

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Understanding Your Soil: Texture, Drainage, and What They
Soil Science

Understanding Your Soil: Texture, Drainage, and What They

You dig a hole for a new shrub in April and the bottom fills with water.You wait two weeks, try again, and get the same result.

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Soil Compaction: The Number One Urban Tree Stressor
Soil Science

Soil Compaction: The Number One Urban Tree Stressor

Soil compaction reduces root growth, drainage, and water availability. Learn how to identify compacted soils and improve them for tree health.

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