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Top 20 Most Common Plants in Ontario

In Ontario, you can find Common buckthorn, Box elder, Common milkweed, Garlic mustard, Tomato, and more! There are 20 types of plants in total. Be sure to look out for these common plants when you’re walking on the streets, in parks, or public gardens.

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Most Common Plants
Common buckthorn
1. Common buckthorn
Rhamnus cathartica, colloquially known as common buckthorn, is a deciduous shrub or small tree native to Europe. This plant is hazardous to humans and most animals; all parts of it are mildly poisonous. The fast-growing common buckthorn is considered an invasive species in certain parts of North America.
Box elder
2. Box elder
Box elder (Acer negundo) is a type of maple tree native to North America, but which is now found throughout the world. It is a hardy, medium-to-large tree that grows quickly and has a relatively short lifespan of up to 60 years. Older trees are prone to storm damage. Box elder wood is relatively flimsy because the tree grows so fast.
Common milkweed
3. Common milkweed
Asclepias syriaca, commonly known as common milkweed, is a flowering perennial herbaceous plant native to North America. It contains milky latex which can be toxic to sheep, cows, and other larger mammals (including humans) if it is consumed in large amounts. Many insect species are attracted to common milkweed, most notably monarch butterflies.
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Garlic mustard
4. Garlic mustard
Alliaria petiolata, colloquially known as garlic mustard is a herbaceous biennial plant known for the garlic aroma and smell of its crushed leaves. It can be found in partially shaded and moist places like woodland edges, trails, hedges, and roadsides. Leaves of garlic mustard are used in European cuisine as a spice herb for salads and sauces.
Tomato
5. Tomato
Solanum lycopersicum is an annual or perennial herbaceous vine native to Central and South America that produces a large, juicy, edible fruit known as tomato. Today there are over 10000 cultivated varieties. Although tomato is the world’s most popular vegetable, botanically it is a fruit.
Mulberry
6. Mulberry
A unique and easy-to-grow edible landscaping plant, the mulberry is prized for its tasty fruits as well as its exquisite ornamental appeal. Originally native to China, this plant was valued for its role in silk production: silkworms will only eat the leaves of mulberry trees, making them crucial for the product's creation. Ultimately, the trees were sold around the world and are used today in different countries that produce silk.
Wild carrot
7. Wild carrot
The wild carrot is a common flowering plant with light, delicate flowers. Originally native to Europe and Asia, it has also spread to North America and Australia. Studies of historical paintings suggest that the wild carrot was cultivated in Turkey, Spain, and North Africa for centuries.
Pepper
8. Pepper
The pepper are commonly used for cooking in places such as the Southern U.S. and Central America. Most are moderately spicy, though because there are so many variants, the spice level can vary dramatically. Cayenne powder is also a popular seasoning product made from pepper plants.
Golden pothos
9. Golden pothos
The golden pothos (Epipremnum aureum) is a popular houseplant that is commonly seen in Australia, Asia, and the West Indies. It goes by many nicknames, including "devil's ivy", because it is so hard to kill and can even grow in low light conditions. Golden pothos has poisonous sap, so it should be kept away from pets and children.
Bittersweet
10. Bittersweet
The species known as bittersweet is a semi-woody vine found in forests, marshes, shrublands, and hedgerows. All parts of the plant contain alkaloids (especially the bright red berries), which are extremely poisonous to humans and livestock if ingested. In spite of its toxicity, bittersweet was hung as a talisman in the past to ward off witchcraft.
Lambsquarters
11. Lambsquarters
Lambsquarters has many other names, including pigweed, goosefoot, and bacon weed. This plant seems to appear out of nowhere and is considered by many to be a pesky weed. However, the greens of this plant are edible, can be prepared similar to spinach, and are packed with nutrients.
Virginia creeper
12. Virginia creeper
The virginia creeper is a North American vine from the grape family that has it all - vigorous growth, fragrant flowers, decorative blue-colored berries, and leaves that turn crimson in the fall. Using small forked tendrils with adhesive pads, the virginia creeper will cling strongly to almost all surfaces. It can grow over entire walls, providing shelter and food for wildlife.
Staghorn sumac
13. Staghorn sumac
The dried bobs of the staghorn sumac are occasionally used by beekeepers for their smokers. Except for the roots, all parts of the plant can be used to make dyes or dye mordants; the tannins in the sap help prevent the dye colors from fading. Luna moth caterpillars feed on Rhus typhina, and pheasants and wild turkeys pick at the fruits.
Riverbank grape
14. Riverbank grape
The riverbank grape is a woody vine that can grow up to 15 m in length. It uses tendrils to climb trees, shrubs, and fences. Riverbank grape is native to North America and is found extensively throughout Canada, as well as the Northcentral and Northeastern United States.
Arborvitae
15. Arborvitae
Northern white cedar (Thuja occidentalis) is a small- to medium-sized evergreen conifer native to North America, and can be found in a variety of environments, including forested wetlands and along cliffs. Essential oils are produced using northern white cedar, and it also finds use as an ornamental plant. Due to its increasing popularity in landscaping, more compact plants have been used to develop smaller strains.
Common lilac
16. Common lilac
Common lilac is a shrub native to the Balkan Peninsula that blooms with a fragrant blossom. It grows on rocky terrain and has a suckering habit. The blossoms are used to flavor honey, sugars, food, and other delights and farmed for its fragrant flowers in the spring.
Rose of sharon
17. Rose of sharon
Hibiscus syriacus is a deciduous shrub with trumpet-shaped pink, lavender, or white flowers. Although it was first collected by Western botanists from Syrian gardens, “rose of sharon” is native to south-central and southeastern China. Because of its hardiness and prolific blooming, it is cultivated all around the world. It is the national flower of South Korea, mentioned in its national anthem.
Corn plant
18. Corn plant
Corn plant (Dracaena fragrans) is an evergreen, slow-growing perennial shrub native to tropical Africa. Also, it is a classic houseplant, grown in Europe since the 1800s. Its glossy green foliage that resembles corn leaves grow on top of a thick cane, which is why the plant is sometimes called “false palm tree.”
Purple coneflower
19. Purple coneflower
Purple coneflower (Echinacea purpurea) is an herb native to North America that flourishes in prairie environments or open wooded areas. The purple coneflower makes a good addition to a flower bed or garden because its blooms last the whole summer and attract pollinators such as bees and hummingbirds.
Bigleaf hydrangea
20. Bigleaf hydrangea
The bigleaf hydrangea is a deciduous shrub native to Japan, and is known for its lush, oval, colorful inflorescence. The two types of Hydrangea macrophylla are mopheads - with large, ball-shaped, sterile flower clusters, and lace capes - with small round fertile flowers in the center, and sterile flowers on the outer side of each inflorescence. Depending on soil pH, blooms can change color from pink to blue.
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More Plants in Ontario

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Most Common Toxic Plants

Ontario's diverse ecosystems, ranging from deciduous forests to wetlands, create a fertile ground for various flora, including toxic species. The prevalence of , , and poses significant threats to both native wildlife and human populations, underscoring the need for careful ecological management to mitigate the risks associated with these harmful vegetations.

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Most Common Flowers

Ontario, Canada boasts diverse landscapes, resulting in a wide array of native flowers. The state's distinct climatic and soil dynamics create the perfect conditions for the proliferation of , , and . These emblematic flowers not only add to the aesthetic allure of the region but also hold cultural resonance and ecological significance. Reliable sources confirm the prominence of these flowers in Ontario's natural setting.

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Most Common Flowers of Spring

As Ontario thaws, verdant landscapes reawaken, heralding Spring with bursts of color. Among the first to bloom are the delicate , symbolizing rebirth, followed closely by the proud , a beacon of vibrant hues. Lastly, the fragrant unfurls, dotting the province with nature's perfumes. These floral paragons encapsulate Spring’s renewal, stitching a vivid tapestry into Canada's seasonal quilt.

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Most Common Spring Fruits

Spring in Ontario unfurls with a vibrant tapestry of blooming florals and a symphony of bird songs, stimulating a season of growth for its fruit plants. Among these, buds awaken with the thaw, flowers burst in preparation for midsummer harvest, and the tendrils of stretch towards the sun, each bearing the promise of crisp delights. These fruits, emblematic of Ontario's rich horticultural tapestry, are a cherished yield of the culture and cuisine.

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Most Common Fruits

Ontario, Canada's fertile soil and moderated climate, courtesy of the Great Lakes, create an apt canvas for the growth of local fruit plants like , , and . With a diversified terrain from the southern vineyards to the northern colder regions, each zone has shaped a sanctuary where these fruits hold cultural significance and support biodiversity, truly epitomizing the province's natural wealth and agricultural tradition.

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Most Common Trees

Ontario, Canada's diverse climatic conditions and rich soil dynamics provide an ideal environment for the growth of native trees. Three standout trees in this region include , , and . These trees hold significant symbolic, cultural, and ecological importance within the boundaries of the state. Through their presence, they contribute to the overall beauty and ecological essence of Ontario, Canada.

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Most Common Weeds

In the fertile yet fluctuating climate of Ontario, gardeners often lock horns with invasive flora. The trio of notorious interlopers , , and reign supreme in this battle. Fueled by the region's verdant summers and tempered springs, these weeds tenaciously seize garden beds, confounding efforts to maintain native beauty and botanical order.

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Most Common Tall Trees

Nestled amidst the variable climes and rolling landscapes of Ontario, Canada, emerge arboreal titans that punctuate its skyline. The Eastern White Pine , the Red Pine , and the Sugar Maple stand as silent sentinels, epitomizing grandeur and ecological stature. These species, integral to Ontario's heritage, not only dominate the canopy but also symbolize the resilience and natural splendor of the province's vast forests.

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Most Common Flowers of Winter

In the frigid embrace of Ontario, Canada's Winter, an icy climate thrives, nurturing a select few flowers that dare to bloom. Among them are the resilient , , and . These winter-blooming flowers showcase not only their tenacity but also their innate allure and emblematic significance. Against all odds, they offer a delicate yet remarkable display of beauty amid the tranquil cold, reminding us of nature's enduring ability to flourish even in the harshest conditions.

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