Plant tissue testing in Portland ORegon

Unlock the Hidden Chemistry of Your Trees

A tree’s leaves tell a deeper story than you might think. At Arborists of America, Inc., we provide advanced Plant Tissue (Foliage) Testing services to analyze the internal nutrient status of your trees and shrubs. This allows us to identify deficiencies that aren’t always visible — and correct them before they affect long-term health or growth.

What Is Plant Tissue Testing?

Plant tissue testing is a laboratory-based diagnostic service that examines the chemical composition of leaf tissue. It reveals exactly what your tree is absorbing (or not absorbing) from the soil — giving you precise insight into its health and nutritional balance.

We test for the following elements:

• Macronutrients:

  • Nitrogen (N)

  • Phosphorus (P)

  • Potassium (K)

  • Calcium (Ca)

  • Magnesium (Mg)

  • Sulfur (S)

  • Carbon (C)

• Micronutrients:

  • Iron (Fe)

  • Zinc (Zn)

  • Copper (Cu)

  • Boron (B)

  • Manganese (Mn)

  • Molybdenum (Mo)

Why Tissue Testing Matters

Visual symptoms like yellowing leaves, stunted growth, or premature drop can have multiple causes — and guessing can lead to costly mistakes. Our testing process eliminates the guesswork by giving you quantified, science-based data on your tree's internal nutrient levels.

Benefits of Foliage Testing:

• Diagnose hidden nutrient deficiencies or toxicities

• Optimize your fertilization strategy (and reduce waste)

• Improve tree vigor, flowering, and resistance to pests/disease

• Support the health of high-value or stressed trees

• Document nutrient baselines for long-term care planning

Ideal For:

• Landscape architects and urban foresters

• Property managers maintaining large tree inventories

• Homeowners with struggling or valuable trees

• Orchards, vineyards, and specialty crops

• Trees showing unexplained decline or discoloration

What to Expect:

Our arborist team collects targeted leaf samples, sends them to a professional laboratory, and delivers a full diagnostic report with recommendations for corrective action. We can also pair results with soil testing for a complete root-to-leaf health snapshot.