By: Ava Green

One of the best things about living in southern Ontario is the beautiful show our deciduous trees and shrubs put on each fall. 

Autumn is also the perfect time to plant trees, shrubs, and perennials. The sun is less intense, temperatures are slightly cooler, and with regular, deep watering, the plants are less prone to transplant shock, ensuring a successful planting. 

As the leaves begin to change, they mark the arrival of autumn, a season full of colour and celebration. If fall is a special time of year for you, our staff have handpicked their favourite deciduous trees and shrubs with the most stunning seasonal displays. Here are their top recommendations.

Autumn Blaze Maple

Botanical Name: Acer x freemanii 'Jeffersred'

This tree is a cross between the fast-growing Silver Maple and the showy Red Maple - two very popular trees! 

Autumn Blaze will provide a display of colour throughout autumn by starting earlier and lasting longer than most other trees. It’s large, with 5-inch leaves that begin by turning red at the top, then eventually shades of red and orange cascade down the length of the tree. 

Even in the winter, this is a beautiful specimen because its shape is so symmetrical.

Seven-Son Flower

Botanical Name: Heptacodium miconioides

Considered a small tree or large shrub, Seven-Son Flower is popular for its year-round beauty! 

Growing to a maximum of 6.1 metres (20 feet) tall and 3 metres (9.8 feet) wide, the leaves of this plant change from spring to summer, making it an interesting specimen plant in the garden. 

The biggest attraction is the fragrant white blooms it produces late in summer, which are highly attractive to hummingbirds and other pollinators. As the blooms fall, they leave behind pink sepals, so it looks like it’s in bloom all over again!

Its unusual bark makes this tree beautiful year-round, but especially in the winter.

Washington Hawthorn

Botanical Name: Crataegus phaenopyrum

Leaves that turn vibrant shades of orange, purple or scarlet red in the fall are just part of the beauty of this small tree.

This is another specimen with year-round interest. In early spring, reddish-purple leaves emerge, which eventually turn dark green, followed by graceful white flowers. After its fall show, it produces bright red berries that last for most of the winter.

Maturing at 8 to 9 metres (25-30 feet) tall, Washington Hawthorn is also an important nectar plant for pollinators and provides food for birds in the winter.

Barberries

Botanical Name: Berberis thunbergii

Depending on the type of Barberry these deciduous shrubs can grow ½ to 3 metres (1-10 feet) tall and have varied shapes and features as well. For example:

• Barberry, Concorde (Berberis thunbergii 'Concorde')forms a nice globe when it's mature. Leaves start out red and gradually turn a deep, dark purple as they mature.
• Barberry, Ruby Carousel (Berberis thunbergii 'Bailone') is a compact variety with vibrant, ruby-red foliage.
• Barberry, Rose Glow (Berberis thunbergii 'Rose Glow') which matures to 1 to 1 ½ metres (3-5 feet) tall, starts out with a combination of green, white, and deep rose-red foliage in the spring. In the fall, it produces bright red berries that persist into winter.

Beautyberry, Pearl Glam

Botanical Name: Callicarpa 'NCCX2'

While many Beautyberry are showy in the fall, Pearl Glam is an upright, small shrub that has all-season interest. Its dark purple foliage emerges in the spring that lasts until frost. 

In late summer it’s adorned with white flowers which attract butterflies and bees. After blooming it produces hundreds of beautiful violet-purple berries which last long after the leaves have fallen.

Crepe Myrtle, Cherry Mocha

Botanical Name: Lagerstroemia 'Cherry Mocha'

Another small ornamental deciduous shrub with an upright growing habit, Cherry Mocha Crepe Myrtle has decorative appeal in every season.

Burgundy coloured stems with semi-glossy burgundy leaves makes this plant stand out. To add to that, new growth at the tips starts out glossy, deep red. If that’s not enough, in late summer and early fall, the blooms on this cultivar are large, cherry-red flowers which stand out from the burgundy foliage. Its flowers late in the season provide important food for bees. After flowering, green seed pods provide extra interest.

Note: Have you ever wondered why leaves on trees and shrubs change each fall? Here’s a simple explanation. During the long, sunny days of summer, trees and shrubs produce plenty of chlorophyll - the food needed to keep the leaves green. In autumn, as the days grow shorter and temperatures are cooler, there is less chlorophyll produced and the plant breaks down residual chemicals on the surface of the leaves which produces shades of red, orange and yellow.

You’ll find more information in our handy Eisings online Plant Finder!

Pruning is an essential part of gardening. Essential, but a little intimidating at first because it’s a broad subject. That said, there are some basic rules that apply to most trees and shrubs that will get you started.

There are a number of reasons to prune; the most obvious is for safety, to keep a branch from doing damage or harm by falling or rubbing against something like a building or another tree. Other important reasons include:

• Removing dead, diseased or damaged wood
• Shaping to make a plant bushier, reduce the size and bulk, or slow down growth
• Thinning to increase light penetration and airflow and reduce the possibility of disease
• Rejuvenation to encourage growth, blooming and fruit

Correctly pruning trees and shrubs can help with everything listed above and, most importantly, help maintain the health of your plants. Proper techniques and timing ensure the best results.

The Right Tools

You may need fewer tools to prune than you think!  

Secateurs or hand pruners work well on smaller branches.

Loppers or lopping shears have longer handles for more leverage and are ideal for medium-sized branches.

A pruning saw works best for larger branches.

Electric or manual hedge shears are best for cutting a tidy wall of foliage like hedges and shaped evergreens.

The key with garden tools is to make sure they’re sharp and sterile. This can prevent the spread of disease. Clean tool blades with rubbing alcohol after trimming each branch.

When to Prune

Pruning timing requires some research as it depends on the species of the plant and the result you’re aiming to achieve. For example, some trees may be best pruned in the winter while they’re dormant and buds have not yet appeared. To shape a tree, it’s easier to prune before the leaves have formed so that all of the branches can clearly be seen. Pruning early in the gardening season will invigorate the tree. Conversely, pruning after the tree has formed leaves in June will tend to slow down growth.

When pruning flowering trees and bushes, there are other timing considerations. Some ornamentals bloom on branches that grew the previous year. Pruning those branches too early will result in fewer or no blooms. For these plants, it’s best to wait until after they have bloomed.

If you’re unsure about pruning timing for your tree or shrub, this is a fairly comprehensive list to use as a guide. We have also linked other resources below this article.

In general, late fall or early winter is not the time to prune any plant as it encourages new growth, which may be damaged by colder weather.

Pruning Techniques

While some trees may require specific care (pines, for example), here are the basic techniques for pruning trees and shrubs. It’s a good idea to know these basics before you head out to begin cutting branches.

Examine the branch, buds and shoots before cutting. Cutting above a bud facing away from the trunk of the tree will have the branch continue to grow in that direction.

Cut on a 45° angle just above a bud whenever possible. Keep your cut above the lowest bud (the bud closest to the trunk), or the branch will die back.

Before removing a large branch, cut ⅔ off the end of the length to reduce the weight. Once the bulk of the branch has been removed, then cut the rest of the branch away from the trunk by cutting close to, but not into, the “collar” of the branch where it meets the trunk of the tree.

Now You’re Ready to Begin Cutting!

Now that you know the techniques for pruning, where do you begin? Here’s a logical set of steps to follow:

1 - Remove any dead or diseased wood

2 - Remove any branches that are crossing and rubbing together. For a shrub that’s too crowded, remove the thickest branches down to the ground first  

3 - Remove water sprouts

4 - Stand back and observe the shape of the tree. If anything is not pleasing about the look (lopsided growth or branches growing too close together or at a sharp angle to the trunk, for example), begin removing or trimming back one unsightly branch at a time. Observing the shape between each cut

5 - Remove any suckers or stubs

Follow The ⅓ Rule!

Once you start, pruning can be fun, but be careful not to get too carried away. Trim up to ⅓ off of an established plant (not a newly transplanted tree or shrub) in one growing season - maximum. Cutting off too much can stress the plant and impact its overall health.

Lastly, know that you can always hire a certified arborist if the task is too much or the tree is simply too large!

Other Resources:

• City of Moose Jaw: Pruning Trees 
• Landscape Ontario: Pruning Shrubs and Evergreens
• Ontario Government: Pruning Fruit Trees
• University of Georgia: Pruning Ornamental Plants