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Structural Pruning (Online and In-Person)

Schedule and location

All sections:
Tuesday, October 27, 2020: Access online self-paced materials (available for 60 days)

Section A: In-Person session meets from Tuesday, November 3, 2020, 9:00 to noon  (CANCELED)
Section B: In-Person session meets from Saturday, November 14, 2020, 1:00 to 4:00 p.m. meet at P-2  (SOLD OUT)

Fees and registration

$39.00 member
$46.00 nonmember
(Fees include admission to the Arboretum)

BY PHONE: 630-719-2468 or to be waitlisted ( Monday through Friday, 9:00 a.m. to 4:00 p.m.)

Course description

Learn best practices for structural pruning and get hands-on practice with a combination of online and in-person classes at The Morton Arboretum.

Late autumn is one of the best times to prune for plant structure. The foliage has fallen, revealing the limbs and form of the plant.

In this workshop you will learn structural pruning techniques for specimen shrubs, small ornamental trees, and young trees. Learn to maintain the plant's natural character and create a strong branch structure, eliminating future problems.

Get started at home with self-paced online materials, which will cover key principles, techniques, and vocabulary with interactive elearning modules and videos. Then get hands-on practice in the field with a trained horticulturist on the grounds of The Morton Arboretum.


How Online Classes Work:

  • To access the online materials, you will log into TreeLearning, the Arboretum’s online learning portal. Instructions for accessing TreeLearning will be sent to registrants on the day the course begins. You have access to the online course materials for 60 days.
  • Complete self-paced e-learning modules with reading material, short videos, interactive activities, and quizzes to check your understanding.
  • The self-guided portion will take approximately 60 minutes. It does not need to be completed in one sitting, but you must complete it before your in-person class session.


Participants must observe the following safety practices:

  • If you are unwell, or have been in contact with someone who is unwell in the last two weeks, you must stay home. Please review your health and recent contacts before coming to class. A full refund will be issued on request.
  • Participants must bring face masks. Face masks are required while indoors. Face masks are also required outdoors when social distancing is not possible.
  • Maintain a distance of six feet from others whenever possible. For more information on the Arboretum’s guidelines, please watch the video at https://www.mortonarb.org/visit-explore/plan-visit/know-you-go-visit-information.

Course number



Katrina Lewin, horticulturist, The Morton Arboretum

Katrina Lewin has a Bachelor's degree in Ornamental Horticulture from the University of Illinois and has been a horticulturist at The Morton Arboretum since 2004.  She enjoys teaching pruning and plant identification classes and is a frequent speaker at local garden clubs.

Course details


  • Held online and outdoors.
  • The online materials will take approximately 90 minutes to complete.
  • Registration closes at 11:59 p.m. (Central) the day before the scheduled course start date.
  • Participants will have access to the online materials for 60 days after the course start date.
  • For your in-person session, please dress for the weather. Be prepared to walk on chipped trails and uneven terrain.
  • Limit 10


  • Must have access to the internet and provide a unique email address for each registrant at registration. 
  • Must know how to use a web browser (ex: Chrome, Safari, Internet Explorer) and how to send and receive email.
  • You will receive an email with log-in information at noon on the day the online materials become available. Complete the online materials before you arrive for the in-person session.
  • Plan to spend about 60 minutes completing the online material. Students will have access to the online materials for 60 days after the first day they access the course. 

Arboretum class weather, cancellation and refund policies