Top 10 Summer Flowers for Backyard Landscaping in Toronto

Reviewed and updated for the 2026 growing season by the Land-Con landscaping team.

The best summer flowers for Toronto backyards are heat-tolerant, sun-loving varieties like petunias, mandevilla, and lavender that thrive through the city’s humid July and August stretches without constant watering. Below, our team ranks the 10 varieties we plant most often for Toronto clients, plus how to choose based on your yard’s sun exposure.

Here Are Our Top Ten Picks of Beautiful Summer Flowers for Backyard Landscaping in Toronto:

1) White Petunias

These are a favorite of avid gardeners everywhere and are one of the most popular flowers. These can be grown from petunia seeds and transplants. Being resistant to heat, they do not require much water. They also come in several other colors like pink, blue, purple, and red.

2) Mandeville

Mandeville is a perfect summer choice because these gorgeous flowers happen to love the sun! They look absolutely great as a centerpiece of a planter. You must water these beauties slowly and thoroughly for the best results.

3) Trailing Ivy

These are one of the best sun-loving, hanging basket plants. They look great as an addition to hanging baskets, and you can use these to add more dimension to your backyard garden. All you need to do is water them regularly and ensure the soil is evenly moist.

4) Orange Begonias

These bright-colored blooms are quite popular as summer flowers and can be a lovely addition to your hanging basket aspect of backyard landscaping design. These are also available in pink, green, and white hues. You can create a cascade of beautiful colors with these pretty flowers.

5) Purple New Guinea Impatiens

These best thrive during the summers and can create an excellent impact with their beautiful color. These Impatiens do not require much maintenance, and can also be found in several gorgeous shades to add to the color pallet of your garden.

6) Geraniums

Geraniums are a classic garden plant and a pure delight to the senses! They have the longest blooming period of all garden flowers and are popular bedding plants. They come in the hues of pink, white, purple, orange, and red.

7) Dragon Wing Begonias

These are best suited for hot and humid climates and are known for their lush angel-wing-shaped leaves as well as exotic bell-like blossoms in shades of pink and red. You can trust them to add color to your garden all around the year! They can be planted almost anywhere, in baskets, containers, or garden beds.

8) Elephants Ears

You can accommodate these plants to add a touch of bold, tropical aesthetics to your backyard garden. Their leaves with unique veinings are the highlight of these plants.

9) Red Million Bells

True to their name, these have lovely bell-shaped flowers. They love the sun which makes them a great addition to the summer garden. Besides red, they are also found in pink, white, and yellow colors.

10) Common Lavender

Lavender requires a lot of sun to grow which is why it is one of the most popular summer flowers. It also needs space and can thrive with less water in rocky regions. Its aromatic, gray-green foliage and beautiful bright purple flowers make it a favorite of many.

With this list of beautiful flowers, you can undoubtedly have an amazing backyard garden. Get started with planting them, and get ready to enjoy your garden all summer long!

Flower Garden in Toronto with Stunning Color Combinations

Choosing the right color pairings can make or break how a flower garden reads from your patio or kitchen window. These blooms are chosen not just because they handle the region’s summer climate well, but because certain pairings genuinely stand out more than others once they’re planted together. Here are a few combinations worth trying:

1. Classic Elegance

White and purple create an air of sophistication and timeless beauty. Pairing the purity of white petunias with the regal elegance of purple New Guinea impatiens brings a touch of class to the garden and adds a calm, serene feel to the outdoor space.

2. Cheerful Vibrance

Yellow and orange bring energy and warmth to a summer garden. Mix the sunny blossoms of marigolds with the radiant hues of orange begonias for a cheerful, inviting look that brightens up any corner of the yard.

3. Harmonious Serenity

For a calmer, more balanced look, pair delicate blue and soft pink tones. Blue trailing ivy alongside pink Mandeville flowers creates a soothing combination that works well near a seating area or patio.

4. Dramatic Contrast

For a bolder statement, pair vibrant reds with crisp whites. The striking red of dragon wing begonias next to white petunias creates a real focal point in the garden.

5. Playful Delight

For something more energetic, mix an array of colors. Zinnias in shades of pink, yellow, and orange planted together create a lively, festive look — a good choice for a family backyard that sees a lot of summer activity.

Experiment with these combinations, or mix your own — once you know which flowers handle Toronto’s summer conditions well, the color pairing is really a matter of personal taste.

A Few More Toronto-Approved Summer Bloomers

Beyond our top 10, a few other varieties consistently perform well in GTA gardens: snapdragons for cooler-toned borders that keep blooming into early fall, torenia (wishbone flower) for shadier corners where petunias struggle, and dianthus for a low-maintenance pop of color along walkways. All three are readily available at Toronto-area garden centres each spring.

Backyard Landscaping in Toronto: Tips and Tricks

Creating Depth with Landscaping Flowers

Take your backyard landscaping in Toronto to the next level by incorporating flowers with different heights and textures. Consider adding trailing ivy or cascading million bells to hanging baskets for a touch of elegance, then combine them with taller blooms like sunflowers or dahlias to create layers and visual interest in the garden.

Summer Flowers for Ontario

Choosing the right plants for Ontario’s summer heat and humidity is what separates a garden that thrives from one that struggles by August. Every flower on our Top 10 list above was chosen specifically for this — petunias, geraniums, and lavender in particular handle Toronto’s hot, humid summers with minimal fuss, while begonias and impatiens are better suited to partly shaded spots that still get afternoon warmth. If your yard runs shadier, dragon wing begonias and trailing ivy will outperform sun-lovers like lavender and million bells.

Perfect Planters

Don’t let limited space hold back your landscaping plans. Planters and containers let you build stunning arrangements even on a small patio. Mix and match colours, heights, and textures to create a personalized look in whatever space you’re working with.

Keeping Your Flowers Flourishing

Maintaining a healthy summer garden comes down to consistent watering and a bit of upkeep. While each flower has its own specific needs, keeping the soil evenly moist, deadheading faded blooms, and applying fertilizer on schedule will keep most varieties blooming well into fall.

Transform Your Backyard Today!

With the right flower choices and a solid backyard landscaping plan, your outdoor space can go from ordinary to something you actually want to spend time in. Start with the varieties above, or reach out and we’ll help you figure out what works best for your yard’s light and layout.

Experience the joy of landscaping in Toronto with our top-notch selection of summer flowers. Explore the options above and start planning your garden.

FAQs on Summer Flowers for Backyard Landscaping in Toronto

1. How often should I water my backyard flowers?

The watering needs of summer flowers can vary, but as a general guideline, it’s essential to keep the soil evenly moist. Depending on the weather conditions and the specific flower variety, you may need to water them every 2-3 days or adjust accordingly. Be mindful not to overwater, as it can lead to root rot.

2. Can these summer garden flowers withstand the hot climate in Toronto?

Yes, the recommended summer flowers for backyard landscaping in Toronto are chosen for their ability to tolerate and thrive in the local climate. They are selected for their heat resistance and ability to withstand summer temperatures. However, it’s still important to provide proper care, including regular watering and occasional shading during extremely hot days.

3. How do I ensure continuous blooming throughout the summer season?

To promote continuous blooming, deadhead or remove faded flowers regularly. This practice encourages the plants to redirect their energy into producing new blooms. Additionally, applying a balanced fertilizer according to the package instructions can help promote healthy growth and flowering.

4. Can I grow these flowers in containers or hanging baskets?

Absolutely! Many of the backyard flowers, such as petunias, trailing ivy, dragon wing begonias, and million bells, are well-suited for container gardening. Ensure the containers have proper drainage, and choose a high-quality potting mix for optimal growth.

5. Are these flowers attractive to pollinators?

Yes, several of the recommended summer garden flowers, such as zinnias, cosmos, salvia, and black-eyed Susans, are known to attract pollinators like bees and butterflies. By incorporating these flowers into your garden, you can create a welcoming habitat for these beneficial creatures.

6. What planting zone is Toronto in?

Toronto sits in USDA hardiness zone 6a/6b. That means tender annuals should go in after the last spring frost — usually mid-to-late May in the GTA — and can be expected to keep blooming until the first fall frost in early October.

Remember, while these FAQs provide general guidance, it’s important to consider the specific needs of each flower variety and adjust your care accordingly. Observing your plants closely and responding to their individual requirements will help you create a flourishing and vibrant summer garden. It is best to consult with a landscaping service in Toronto for personalized recommendations.

Rely on Us for Backyard Landscaping in Toronto

Ready to transform your backyard into a space full of color and blooms all summer long? Consider Land-Con. Our team can help with color combinations, design ideas, and personalized recommendations for backyard landscaping in Toronto.

With our knowledge of local growing conditions and experience designing outdoor spaces across the GTA, we’re a solid partner for your backyard landscaping needs — from picking the right summer flowers to planning out the rest of your backyard design.

For additional information on backyard landscaping in Toronto, please contact our experts at Land-Con. Our specialists will help you out with summer gardening.