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Soil Science & AgronomyCOURSE-0050

Diagnose & Fix: Reading Your Plants and Soil

Read your plants and soil to find the real cause of a problem and fix it: the old-leaf vs new-leaf method, the real causes behind "deficiencies" (pH, balance, water), soil-structure problems, healthy soil as your first defense, and how to read a soil test.

Certificate · 80% to pass5 lessons6 quizzes

Published June 17, 2026

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A gardener examines plant leaves and soil in a sunlit garden bed, comparing old and new growth while reviewing a soil test report.

What you'll learn

  1. Lesson
    Lesson 1 - Read Your Plants: The Old-Leaf vs New-Leaf Method
  2. Quiz

    Read Your Plants - Quiz

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  3. Lesson
    Lesson 2 - Why Your Plant Looks Hungry (and It Is Often Not a Shortage)
  4. Quiz

    Why Your Plant Looks Hungry - Quiz

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  5. Lesson
    Lesson 3 - Fixing Soil Problems: Compaction, Drainage, and Low Organic Matter
  6. Quiz

    Fixing Soil Problems - Quiz

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  7. Lesson
    Lesson 4 - Healthy Soil as Your First Defense Against Pests and Disease
  8. Quiz

    Healthy Soil as Defense - Quiz

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  9. Lesson
    Lesson 5 - How to Test Your Soil and Read the Report
  10. Quiz

    Test and Read Your Soil - Quiz

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  11. QuizFinal

    Diagnose & Fix Certification Exam

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