Got plant problems? Learn plant diagnostics online!

Plant Diagnostics: The Step-by-Step Approach to Identifying Plant Problems is an online course offered by the UW-Madison Division of Extension Horticulture Program. The course is designed to teach you troubleshooting skills for plant-related problems. This online course runs from February 1 – April 30, 2024.

Learn the step-by-step process for identifying plant problems in your gardens. This course explains the basics of the plant diagnostic process in an easy-to-understand way.

At the end of the course, participants will be able to:

  • Explain the steps of the diagnostic process.
  • Identify appropriate resources to use in the diagnostic process.
  • Learn to use UW-Madison Division of Extension diagnostic services and labs for extra help.

The online course is self-paced, with 13 modules that include videos, reading, and interactive activities. Two live webinars, “Putting the Process into Practice: Real World Diagnostics”, led by Extension Educators, and “Meet the Labs!”, presented by diagnostic lab directors, are included in the course. Anyone interested in becoming a better gardener and detecting problems as they arise is invited to participate in the course!

Registration is open through January 2024 and is open to the public.

Early Bird registration runs from December 1, 2023, to January 21, 2024, at $99 for the general public and commercial professionals.

Regular registration runs from January 22 – 31, 2024, at $109.

Special discounted pricing ($49) for active participants in the Wisconsin Extension Master Gardener Program.

Find more information about this course at

Master Gardeners: Complete the course by December 31, 2024, for 7.5 hours of continuing education.

ISA Certified Arborists: Complete the course by April 30, 2024, to earn 7.5 CEUs.

Questions? Contact the course moderator, Amy Freidig, at

The UW-Madison’s Extension Horticulture Program provides research-based horticulture information to Wisconsinites so they can make gardening decisions that keep their plants healthy while protecting the environment.

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