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Our ephemeral seeds are available at no cost to our members. Read more.

Here's a great plant to grow from seed. Read more.

MEMBERS' OPEN GARDENS

Brian & Maureen Bixley, Lilactree Farm: 10am - 4pm JUNE 16, SEPT 15. Plants for sale. #547231 8th Side Rd, Mulmur, ON

Marion Jarvie: 10am - 4pm  MAY 25 & 26, JULY 20 & 21, AUG 17 & 18. Plants for sale. Details

David & Dierdre Tomlinson, Merlin’s Hollow: 10am - 5pm  JUNE 8, JULY 6 & 14. 181 Centre Cres, Aurora ON

Public is welcome. info [at] onrockgarden [dot] com (Contact us)

What's New!

  • Posted on May 20, 2013

    Spanish River Carbonatite is a natural-source soil additive from volcanic deposits located in in Ontario. Harvey Wrightman introduced it to our members four years ago as a very effective soil supplement for alpines, especially if applied early to mimic the nutrients which feed mountainous regions as snow melts. The product is available at  Wrightman Alpines Nursery and has recently become more widely distributed as “Volcanic Minerals Plus”. For a list of retailers, see www.borealagrominerals.com

  • Posted on May 16, 2013

    Kat Fox of Garden Making has given us glowing report. Thanks go to to all of our vendors, customers and volunteers. Read Kat's blog.

    Crowds poured in at noon

  • Posted on May 13, 2013

    The Garden Professors are four university professors dedicated to translating scientific information for your gardens and landscapes. Follow them on Facebook. Robert Pavlis, ORG&HPS member, says that Linda Chalker Scott is a well known speaker, writes a great blog and is probably the person on the net that he respects the most for gardening and tree information. The group will be speaking in Toronto in August at the International Society of Arboriculture.

  • Posted on April 20, 2013

    Member Darren Heimbecker's botanical garden has won the national award: Canadian New Garden Experience of the Year! Darren tells us that their garden centre has many great alpine plants including 9 different species of Saxifraga  and some cultivars too. Their Rare Plant Sale will be held Saturday June 8th, 9:30am-3:00pm. Details

Plant of the Month for May, 2013

 (PRIM-yew-lah den-tik-yoo-LAH-tuh)

General Information:

Primula, also known as a Primrose, is a sure sign of spring. Grocery stores and nurseries sell them by the millions. If you have tried growing these same plants in your northern zone gardens you were probably disappointed. The commonly sold Primrose has not been bred for the garden and just doesn’t do well in our climate. But there are many primulas that grow extremely well in the garden and Primula denticulata, the drumstick primula, is one of the easiest and showiest to grow.

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