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Continuing Education Units
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Both ASHS Certified Professional Horticulturists and Certified Horticulturists are required to submit continuing education units to renew certification. The requirements are slightly different for each certification:

Certified Professional Horticulturists (CPH) must submit a total of 40 CEUs every two years along with paying the renewal fee to renew their ASHS certification. All CPHs are on the same cycle of renewal. The current cycle is January 1, 2019 - December 31, 2020.

Download the CPH CEU Reporting Form

Certified Horticulturists (CH) must submit a total of 30 CEUs every three years along with paying the renewal fee to renew their ASHS certification. CHs renewal is every due three years from their date of passing the CH exam.

Download the CH CEU Reporting Form


There are Four Activities eligible for Continuing Education Units:

Professional Meetings: (no maximum) Short courses, workshops, clinics, conferences, symposia, seminars, field days, college courses, scientific presentations, distance educations. Provide location (City, State) and who sponsored the meeting and the name of the lecturer(s) (i.e. ASHS Annual Conference, St. Louis, MO - Cut Flowers Workshop - John Doe).

Self-Directed Study: (20 CEU maximum) scientific journals (reported by article, 1 CEU = about 2,500 word article), books, videos. Must provide the name of the journal, title of article (i.e. HortTechnology (10)2 pgs. 140-145).

Community Service: (10 CEU maximum) elected to professional boards, service to profession (e.g., professional society committees, exam committees, standards/ethics panel, certification boards, editorial boards), city, town, county committees, expert witness, community service related to profession.

Author/Educational Materials: (10 CEU maximum) Title of scientific papers and books, popular articles, consultant reports, preparing educational materials. Provide name of publication work is published in (i.e. HortTechnology (10)2 pgs. 140-145).


ASHS approved CEUs can be earned at the following:

ASHS Annual Conference

FSHS Annual Meeting

Longwood Graduate Program Symposium

Longwood Gardens Professional Credit Courses - ongoing


*Please send workshop or event information to to have it approved and posted on the ASHS website.


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