Japanese maple – an Ontario thriller

3 min read

Japanese maple – an Ontario thriller

In container gardening, we use the phrases thriller/filler/spiller to help us arrange plants – with the ‘thriller’ plant being the signature plant that draws our attention.  In garden landscapes, we can’t think of any one plant that is more ‘Thriller’ than the Japanese Maple. The graceful plant form – the dramatic leaf types – the amazing foliage colours – Japanese Maple is the definitive Ontario garden thriller.

 

The diverse beauty of Japanese maples has captivated gardeners for centuries. During the Edo era in Japan (1603-1867), over 250 named cultivars were selected and grown. Today, there are over 1,000 varieties of different sizes, shapes and hardiness levels.

 

Japanese maples are especially prized for the diversity of size, shape, and colour of foliage. Foliage colour changes with the season and many are especially spectacular in the autumn. Japanese maples are usually categorized according to leaf type. These include palmate types -large leaves that look like your hand. Deeply divided types - the leaves are divided down to the petiole. Dissected leaf types - the leaves are fine and deeply dissected or serrated. Other - these include variegated leaf types and linear lobum or line-leaf types.

 Red japanese maple

Site selection
Japanese maples grow well in our climate if a few basic principles are followed. The most important is to select a sheltered planting site that is out of the severest northwest winter winds. If it must be exposed to wind, ensure the tree is well wrapped with burlap in the winter months. Japanese maples grow well in any well-drained soil. They grow in full sun to almost full shade and will do best with protection from the mid-day sun. The amount of light will affect the leaf colour; red leaf types will be more colourful in higher light conditions.

 

Planting
Mix one part peat moss to three parts of soil in the planting hole, which should be much larger than the root ball. Water heavily at the time of planting and mulch the entire area with a two-inch layer of bark or leaves to ensure water retention and keep the roots cool. Only moderate amounts of fertilizer such as a transplanter with a formula in the ratio of 5-15-5 should be used at planting time.

 

Fertilizing and trimming of established plants
Once established, Japanese maples may be lightly fertilized only in the early spring (April) with 4-12-8 fertilizer or 15-30-15 water-soluble mixture. Major structural trimming may be done before the new leaves unfurl in spring. Lighter pruning can be accomplished any time in June after the first major flush of growth begins.

 

Diseases
Japanese maples are subject to very few pests. Aphids, leafcutters, and rollers may appear in the spring and can be effectively treated with an approved spray. (Ask the experts here at your local garden centre to recommend an appropriate product). Mildew may appear in humid conditions.

 

Winter protection
Wrap Japanese maples with burlap for at least the first three years in the garden. In more exposed locations, wrap every year. A heavy watering just prior to freeze-up will help to guard against water loss in winter. An extra heavy layer of mulch will also help to protect the root system.

 

Japanese maple varieties
The diversity and popularity of Japanese maples make it virtually impossible to predict their availability in any given year! Consult with us for the cultivars currently available.



Also in The Dirt from the Garden Centre...

The Top 6 Tips for Planting Bulbs in the Fall
The Top 6 Tips for Planting Bulbs in the Fall

2 min read

After a long, snowy winter, we all look forward to seeing those spring blooms peeking out and brightening up your garden. This is the time of year to start planning and planting for a successful spring in your garden. Planting bulbs in the fall is a great way to guarantee that spring colour...
Read More
Fertilize in the Fall? 7 Tips for Fall Lawn Care
Fertilize in the Fall? 7 Tips for Fall Lawn Care

2 min read

Taking care of your lawn in the fall ensures that your lawn will have less winter damage, will recover faster in the spring, and have deep roots to help it withstand the summer’s drought...
Read More
Caring for Ornamental Grasses – When to Trim and How to Divide Them
Caring for Ornamental Grasses – When to Trim and How to Divide Them

2 min read

Ornamental grasses add height, movement, texture and colour to any landscape. They are tolerant of many soil types and thrive with lots of sun, little rain and no chemicals or fertilizer. Native grasses, especially, are also an attractive food source for birds and butterflies...
Read More