Heading to class

Jonathan Ebba

On Thursday, August 18th, eighteen Strafford County Master Gardeners attended a three-hour workshop conducted by Jonathan Ebba.

Jonathan is the Horticulture Facility Manager, Thompson School of Applied Science, University of New Hampshire, Durham.

Plant propagation and over 2016-08-18 08.57.30wintering plants are topics of critical concern to us because we hold an annual plant sale each May to fund our community gardening projects and our scholarship program.

The workshop outline included:

  • Propagation
    • Timing
    • Technique
    • Seed grown perennials
    • Divisions or offshoots
    • Cuttings
  • Overwintering plants
    • Hardiness zones and chill hours
    • Cover and uncover
    • Methods
    • Considerations

The three hours was packed with information, questions and answers, and some hands on division of perennials.


A few side notes were:

  • Perennial seeds need both air and water to sprout
  • Do not utilize a seed starting mix with fertilizer
  • If you have a choice between perlite and vermiculite, choose vermiculite because it holds the water better.
  • A plant that is left in a pot to freeze from all sides loses two hardiness zones
  • If you are going to hold plants over on a regular basis, dig a trench, set pots in the trench, backfill, and place the potted plants into the pots in the trench.
  • If using leaves for mulch, whole hard wood leaves such as maple as good for that purpose
  • If plants are stored in an unheated garage or barn be aware of potential moisture loss

Here in NH, UNH Cooperative Extension sponsors an Education Center and Information Line staffed by NH Master Gardeners. The Ed Center provides an opportunity for residents to call, email, or stop in to get their gardening questions answered.

If you are reading this blog, reside outside of NH, and have questions about seed starting, propagation, division of perennials, or over wintering of plants, leave us a comment, and we’ll get you an answer. We never tire of talking gardening.

Reference Books suggested by Jonathan Ebba:

  • Plants from Test Tubes: An Introduction to Micropropagation by Lydiane Kyte (Author), John Kleyn (Author)
  • Manual of Woody Landscape Plants Their Identification, Ornamental Characteristics, Culture, Propogation and Uses by Michael A. Dirr

Submitted by:  Judy V., MG since Spring 2007



Strafford County Master Gardeners Association, part of the University of New Hampshire Cooperative Extension, is fifty+ gardeners strong, educating through gardening in Strafford County New Hampshire.
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3 Responses to Heading to class

  1. This sounds like a great workshop. I’m bookmarking your post for future reference!

    Liked by 1 person

  2. Oddment says:

    Looks like a great class! Thanks for the invitation to those of us in the long distance.

    Liked by 1 person

  3. Jean Olson says:

    Judy, You have done a wonderful job summarizing the class and your photos are spectacular. Thank you, Jean


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