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Gardens Preferred, Gardens Premium Members and Innovators save on Continuing Education Courses
A 10% discount on classes will be applied automatically at the time of checkout.
Soils and Media

Dates & Prices
June 4-25, 2025
Fee: $189
Fee for Innovators, Gardens Preferred, and Gardens Premium Members: $170
Registrations may be cancelled up to two weeks before the event, and your registration fee, less a $30 processing fee, will be refunded. Please note that refunds are not available for programs moved to scheduled inclement weather dates.
To notify us of your cancellation, email us or call 610-388-5454.
This class is intended as an adult learning experience. Find out more about our Family Learning experiences.
Register by May 28, 2025
Gardens Preferred, Gardens Premium Members and Innovators save on Continuing Education Courses
A 10% discount on classes will be applied automatically at the time of checkout.
During this 5-week course taught by horticulturist Mark Highland, discover the foundations of healthy gardening and explore a variety of soils and alternative growing media.
Take a deep dive into how soil health impacts garden productivity and uncover the unique requirements for different growing methods—as well as the vital roles of soil organisms, sustainable soil management practices, and strategies for improving soil quality.
Certificate Information
This class serves as an core component of our Gardening Certificate.
Course Schedule
Wednesdays, June 4-25, 2025
5:00–7:30 pm
Location
Grove Studio 104 & 105
Instructor
Mark Highland
Mark Highland pushed his first shovel into garden soil on a beautiful piece of Illinois farmland. After he "grew up", he earned a B.S. degree in Environmental Horticulture at the University of Florida. Highland focused his M.S. degree studies on compost and potting soil. After the Longwood Graduate Program, Highland started an organic, peat-free potting soil company, The Organic Mechanic Soil Company, LLC.