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September 2012 Digital Edition
 
 
 
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Preparing the garden for winter


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By Sean James

Many of us dread the Canadian winter, and rightly so.  For gardeners, there is extra reason for concern.  Customers have certain expectations of perfection and weather can wreak havoc on plants.  Snow load can weigh them down, permanently damaging their form.  Winds dry them out, burning evergreens and killing twigs on shrubs that are not totally hardy.  At the same time, winter can be a lovely season to look at a garden if fall clean-up is done properly.

Some actions are necessary, such as removing diseased foliage and leaves.  Plants such as tall-bearded iris, peonies, and phlox get leaf diseases and should be cut down in the fall, (the iris actually should be cut to a six inch fan in August and spotted leaves pulled off and removed).  Sanitation is a good way to control most diseases.  Trees with powdery mildew should have the fallen leaves raked up to prevent re-infection in the spring.
 

 

Beyond that, it’s time to throw out some conventional methods.  The advantages of leaving the plants standing outweigh the advantages of the traditional ‘clean up every scrap’ method.  We clean up everything to deprive rodents of homes, remove diseased foliage and cut pest problems.  On the other hand, leaving most of the perennials and grasses standing throughout the winter allows the plants to hold snow and therefore shelter themselves.  The pests find a home regardless of what we do but the beneficial predators need that shelter and will help control problems all year long.  This is very important since we’re now under the pesticide ban.  We need to learn to work with Mother Nature as much as possible.  Most people love birds.  Leaving the garden standing encourages these birds which do wonders to control pests.  (Anything that can be done to encourage birds including planting native berry and seed plants, planting shelter plants and planting native trees helps to control pests in the garden.)
 

All else aside, in a time where more and more people are understanding and nurturing the natural world, most appreciate the varied forms and textures which result from leaving the garden standing in winter.  For the few remaining, a bit of education on the benefits should suffice to change their minds – even just a simple pamphlet.

Up until the last few years everyone turned the soil in the fall.  Now we know that this damages soil structure and moves new weed seeds into the germination zone.  No-till culture is easier, cheaper and healthier for the environment.  It is far better to mulch with composted pine mulch every spring to keep weeds down and keep moisture in.  The mulch also provides nutrients and supports the growth of beneficial fungi and bacteria.

Although cities offer leaf pick-up services, it doesn’t make sense to use gas and diesel engines to pile, haul, turn and mulch them, then bring them back to our gardens.  Nature offers a better alternative!  Mulching leaves into the garden and into the lawn is not only more environmentally friendly but it also returns nutrients to the soil.  It’s cheaper and faster.

Most pruning should be left until the spring although there is one exception.  Often we wrap narrow evergreens to stop the snow from pulling them open.  Shearing them in the fall to give them tight growth and remove ‘feathery’ bits will stop the snow from sitting on them and weighing them down.  This October shearing is more and more effective every year that it’s done and also gives a formal look to the winter landscape.

Wrapping only needs to be done with newly planted evergreens to stop them from drying out in the winter winds.  Really, this is only an issue for the first year.  It was pointed out by a garden designer with a sense of humour, “What’s the point in planting an evergreen if we have to wrap it in the winter and won’t be able to see it?”  Better to plant material that’s hardy enough to not need wrapping and treat it culturally well.  It’s important after a dry fall to give evergreens, (and broad-leafed evergreens such as Rhododendrons), a deep watering in the fall to be sure they have enough water in the needles, leaves and twigs to make it through the winter.  Remember, with the soil frozen, they won’t be able to take up water until the spring.

All these methods take a shift from the way we’ve been working for years but they will pay off in plant health.  They’re easier, more eco-friendly, and, in most cases more visually appealing.  They save money and time.  These are all good things.  Letting go of outdated ideas is hard but worthwhile. 

Sean James is the owner of Fern Ridge Landscaping & Eco-consulting.  He is a graduate of the Niagara Parks School of Horticulture and sits on several committees including Landscape Ontario’s Environmental Stewardship Committee and the Invasive Plant Council’s Horticultural Outreach Collaborative.  Some of his other articles are published at www.fernridgelandscaping.com.  Comments and questions are welcome at sdjames@on.aibn.com.
 

 
 
 
 
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