Laidback Gardener Tip of the Day

Northern Gardeners Need Own Root Roses

septembre 6 angl

Most rose bushes sold around the world are grafted (budded) onto the easy-to-produce and vigorous rose ‘Dr. Huey’. And that’s not a problem if you live where ‘Dr. Huey’ is hardy, that is, in USDA hardiness zones 6 to 9. But it is a problem if you garden in zones 1 to 5, because if the winter is the least bit harsh, you’ll lose your plant, end of story. Of course, you can try mounding, wrapping, rose cones, trenching, etc. and they do work… sometimes. But inevitably, you’ll lose most of your grafted rose bushes over time, no matter what special winter care you give them. The laidback Northern gardener should avoid grafted roses like the plague and stick to “own root roses” (non-grafted roses), those that grow on their own roots. Planted in the right zone, own root roots have a nearly 100% winter survival rate! If you live in zone 5, for example, choose an own root rose adapted to zone 5 or to an even colder zone: 1, 2, 3 or 4. If you’re in zone 4, you’ll want a rose for zones 1, 2, 3 or 4. Etc.

But how do you recognize an own root rose bush in the nursery? Look at the base of the plant. Budded roses have a swollen area at the spot where they were grafted (budded), a swelling formed by the reaction of the rootstock to the graft. If you’re not sure, go to a nursery and ask someone to show you: a rose graft is very visible once you know what to look for. If the rose stem shows no swelling, that is, it is smooth from its base to its first branches, is an own root rose. And that’s what you want!

Larry Hodgson is one of Canada’s best-known garden communicators. He has notably been editor-in-chief of HousePlant Magazine, Fleurs, Plantes et Jardins, À Fleur de Pot and Houseplant Forum magazines and is currently the garden correspondent for Le Soleil and radio garden commentator for CKIA-FM Radio. He has written for many garden publications in both the United States and Canada, including Canadian Gardening, Harrowsmith, Horticulture, Fine Gardening and Organic Gardening. He also speaks frequently to horticultural groups throughout Canada and the U.S. His book credits include The Garden Lover’s Guide to Canada, Complete Guide to Houseplants, Making the Most of Shade, Perennials for Every Purpose, Annuals for Every Purpose, and Houseplants for Dummies, as well as nearly 60 other titles in English and French. He is a past president of the Garden Writers Association (now Garden Communicators International) and the winner of the prestigious 2006 Garden Media Promoter Award offered by the Perennial Plant Association. He resides in Quebec City, Quebec, Canada.

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