Journal, Seedex, Speakers, Sales, Workshops and more -- Join!

We'll have many choice plants which are seldom available at garden centres. Details

10 a.m. - 3 p.m. at Royal Botanical Gardens in Burlington. Details

Springtime simplicity and colour at its best. Read more

Our garden tours are free for our members. info [at] onrockgarden [dot] com (Contact us) for details.


Our members open their gardens to informal visits from fellow members. Join to learn more.


Yeah! It's gardening season. Time to look over your excess plant material from spring clean up and set aside treasures for the Super Plant Sale. We're getting many inquiries from the public and can anticipate that your seedlings, rooted cuttings and mature specimens will sell quickly. Please collect lots of produce trays from the supermarket for our shoppers to carry their plants.


It's exciting to see the great vendors participating in this years sale. View

What's New!

  • Posted on April 22, 2017

    Member, Larry Davidson, informs us that his nursery is open Wed to Sun 10 - 5. Details

  • Posted on April 8, 2017

    Royal Botanical Gardens in Burlington holds its Plant Faire from 10 till 3. Vendors, societies and talks of interest to all kinds of gardeners. Admission is free. Details

  • Posted on March 27, 2017

    Frank Kershaw presents Garden Privacy & Security on April 19. Marion Jarvie's talk on June 17 is "Spring in the Jarvie Garden". Details.


  • Posted on March 17, 2017

    Red Lily Beetle

    The Big Bug Hunt is a new citizen science project collecting information about pest behaviour with the aim of notifying gardeners when pests are heading their way. Input from gardeners around the world will help beat garden pests more effectively and without resorting to chemicals. Report your observations through

  • Posted on February 20, 2017

    NARGS plans to create a feature to attract potential rock gardeners by posting on its website lists of plants that are easily grown and accessible. The list on NARGS will be linked to the ORG&HPS website, so that browsers can eventually become our new members. It is sometimes hard for a newbie to know where to begin: which plants are worth buying and trying to grow (with a reasonable expectation of success) and which plants are easy to find (either at local garden centers and nurseries, or online). For the plant lists to be optimally useful, users will need to be able to compare their own weather patterns and soils to those submitted by chapters around North America. Contribute your suggestions of 20 – or even more – plants along with whatever information you care to add about how you grow your plants by contacting Anna Leggatt or info [at] onrockgarden [dot] com (contact us).

Upcoming Speakers

Plant Highlights from My Travels Around the World

Anna Leggatt

Anna has a BSc. in Botany from London University, a Diploma in Nature Interpretation from Humber College and a Diploma in Horticulture from Guelph. She is currently employed as a part time Nature Interpreter at the Kortright Centre for Conservation...

My Accidental Scree Garden

Miriam Goldberger

Long before “Sustainable” became a powerful buzzword, Miriam Goldberger began growing wildflowers. A flower farmer since 1986, Miriam is an expert in organic and sustainable gardening. She is the founder and co-owner of Wildflower Farm, a wildflower...

Plant of the Month for April, 2017

 (PRIM-yew-luh  ee-LAY-tee-or)

General Information:

Primulas are great garden plants for part shade and Primula elatior ssp pallasii is one of the best. I normally do not care for pale coloured flowers, but the light yellow of this one, combined with its early flowering, makes it stand out in the garden. It is a real gem that seems easy to grow.

Primula elatior ssp pallasii:photo by Robert Pavlis

Primula elatior ssp pallasii:...