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Reduced Hours during Winter Wonders: RBG Centre and Hendrie Park will close at 4 p.m. during Winter Wonders (final admission 3 p.m.). Timed-tickets required to access these areas for the evening Winter Wonders experience.

Arboretum

RBG’s Arboretum is more like an English landscape park than a garden. As its name implies, this is the place where you can see a wide variety of trees and other woody plants up close. It is especially beautiful in spring and fall.

Key Attractions

Quick Facts

  • Over 47 hectares (116 acres)
  • Showcases 1,164 types and 3,400+ individual plants
  • Home to one of the largest lilac collections in the world (over 400 varieties)
  • Snowy sloped trail in the forest
  • pinecone from picea abies
  • Cootes Boardwalk in winter
  • Light blanket of snow across the arboretum
  • snow lightly dusts the ground of the forest at the Arboretum
  • snowy trail through a forest of tall pine trees

Visiting the Arboretum

Admission & Parking

Garden Admission does NOT apply for visiting the Arboretum.

Parking:

  • A $10 parking flat rate applies when the parking lot is staffed.  Metered parking is in effect beyond staffed hours, $5/hr to a maximum of $15.
  • Parking is FREE to RBG members with a RBG parking pass

Getting to the Arboretum

16 Old Guelph Road, Hamilton, L0R 2H9

Arboretum Hours

Today’s Hours

Seasonal Hours

  • 8 a.m. to dusk (Jan 1 to May 4)
  • 9:30 a.m. to 9 p.m. (time-ticketed arrival) (May 5 to Jun 1)
  • 8 a.m. to dusk (Jun 2 to Dec 31)

Exceptions

  • Dec 24 Christmas Eve: 10 a.m. to 3 p.m., last admission 2 p.m.
  • Dec 25 Christmas Day: Closed
  • Dec 26 Boxing Day: Closed
  • Dec 31 New Years Eve: 10 a.m. to 3 p.m., last admission 2 p.m.
  • Jan 1 New Year's Day: Closed

Collections & Areas of Interest

Illustrated map of the arboretum indicating areas of interest and trails
  1. Katie Osborne Lilac Collection
  2. Magnolia Collections East and West
  3. Dogwood and Redbud
  4. Crabapple Collection
  5. Flowering Cherries
  6. Avenues of Trees
  7. Synoptic Shrub Collection
  8. The Pinetum

Katie Osborne Lilac Collection

Peak Interest: May and early June

The Lilac Dell exhibits over 400 species and cultivars of common lilacs. French hybrids form the basis of the collection, but also displayed are Preston hybrids (originated in Canada by Isabella Preston), early-bloomers such as hyacinth lilacs and a selection of species found in the wild. An introductory Lilac Walk at the entrance to the Lilac Dell is organized in a series of exhibits that interpret the desirable breeding characteristics of lilacs, and major developments in the history of lilac breeding. On more challenging terrain, The Katie Osborne Lilac Collection within the Lilac Dell is one of the most diverse and one of the definitive collections to demonstrate the range of the genus Syringa. A popular seasonal attraction, it provides visitors with weeks of delightful springtime colour and fragrance.

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Magnolia Collections

Peak interest: April and May

Magnolias are among the most primitive of flowering plants, with fossil remains dating back over 100 million years. Relatively unchanged since then, they are found in the wild in tropical and temperate Asia and America. The collection, located in two separate areas of the Arboretum, displays a selection of magnolias that are hardy in our area. The collection also exhibits Ontario’s native magnolia, the Cucumber-Tree (Magnolia acuminata), an endangered species found wild in only a few locations in the Carolinian Zone. The western section of the collection was originally developed as a memorial to local architect Lester Husband, while the eastern section, near the Synoptic Shrub Collection, commemorates past Gardens’ staff member R. A. Sims.

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Dogwood and Redbud Collection

Peak interest: May

RBG’s woodlands are home to some species more commonly found in the southern United States. For example, south of the lilac dell the collection of dogwoods (mostly Cornus florida and its cultivars) and redbuds (Cercis canadensis) at the edge of this woodland provide a springtime show of mauve-pink and white blossoms. A member of the Pea family, Redbud reaches the natural limits of its range near Lake Erie, though it can be planted further north. Interestingly, Cornus are commonly used as shrubs in the landscape but can reach 5m tall in their natural habitat.

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Crabapple Collection

Peak interest: May (flowers) and fall (fruit)

Our display highlights the range of form and colour in the Malus genus. Crabapples are a common small tree used in residential landscapes. Over the years RBG has grown and evaluated many of the hundreds of cultivars bred from the two-dozen or so wild species found in North America, Europe and Asia.

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Flowering Cherries

Peak interest: April and May

At RBG, our flowering cherries are part of our early spring celebrations. Globally, flowering cherry trees have a long history, especially in Japan where cherry blossoms are celebrated, and flowering times recorded dating back 1300 years. RBG also annually records the flowering times of its Cherries as part of a biological science known as phenology which is an important tool in helping to track climate change. In 2010, we added 34 trees to this collection, donated to RBG as part of the Sakura Project. These trees are planted at both the Arboretum and Rock Garden sites and are a must see in early spring.

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Synoptic Shrub Collection

Peak interest: all year

The Synoptic Shrub Collection presents a living encyclopedia of shrubs that can be grown in our area. Like a dictionary, it is organized alphabetically, by genus, from A to Z. It includes species as well as cultivated plants commonly available in the horticultural trade as well as unusual shrubs that are harder to find and have been sourced from other botanical gardens through plant exchanges. Currently undergoing rejuvenation, visitors will be able to see how a collection of mature shrubs can be revitalized.

The Pinetum

Peak interest: all year

Also called evergreens, needle-leaved trees or softwoods, conifers are trees whose seeds are open to the air, most often in cones. Most keep their leaves for at least two years, and all have soft resinous wood.

Ontario’s tree emblem reflects the major role that some members of this group of plants have had on our history—the British Navy’s demand for Eatern White Pine (Pinus strobus) shaped the early settlement of our province. Along with pines, spruce, and firs the Pinetum explores the diversity of conifer genera around the world and features 140 unique types represented by over 200 individuals.

The Journey to Anishinaabe Knowledge

Peak interest: all year

Native plants provided Indigenous peoples with almost all of life’s essentials. Starting in the Arboretum near the Nature Interpretive Centre, this new trail explores plants used by the Anishinaabe peoples, and their connections to culture, language, ecology and history.

Learn More

What’s in Bloom & Plants of Interest at the Arboretum

Winter

  • Witch-Hazel
  • Pinetum
  • Fruit-bearing shrubs
  • Grasses
  • Yellow Forsythia Blooms
  • Redbud Blooms Starting On Branch
  • Pink Crabapple Blooms
  • Lilac Dell In Arboretum In Bloom
  • Pink Saucer Magnolia Flowers In Bloom

March

  • Witch-Hazel
  • Avenues of Trees

April

  • Witch-Hazel
  • Redbud
  • Flowering Cherry*
  • Magnolia*
  • Avenues of Trees

May

  • Redbud
  • Flowering Cherry*
  • Crabapple (flowers)
  • Lilac (late-May)
  • Dogwood
  • Avenues of Trees

Bloom times can vary from year to year as they are influenced by many natural events including temperature and climate. Please bear in mind that if we experience an early or late spring, bloom times could shift up to 10 days earlier or 10 days later.

*These plants have short bloom times and are very weather dependant. Check our social media feeds closer to bloom time for updates.

  • Two Tone Lilac Blooms
  • Cornus Dogwood Arboretum
  • Tree-lined Boardwalk Trail
  • Sicamore Tree Arboretum
  • Tree Trunk In Forest

June

  • Lilac (early-June)
  • Dogwood
  • Avenues of Trees
  • Synoptic Shrub Collection

July

  • Avenues of Trees
  • Synoptic Shrub Collection

August

  • Avenues of Trees
  • Synoptic Shrub Collection

Bloom times can vary from year to year as they are influenced by many natural events including temperature and climate. As Please bear in mind that if we experience an early or late spring, bloom times could shift up to 10 days earlier or 10 days later.

*These plants have short bloom times and are very weather dependant. Check our social media feeds closer to bloom time for updates.

  • Acorns Quercus Rubra
  • Arboretum Large Tree With Red Leaves In Autumn
  • Red Berries On Tree
  • Crabapple Tree In Fall Turning Red
  • Ohio Buckeye Fruiting

September

  • Seed Bearing Trees
  • Crabapple (fruit)
  • Synoptic Shrub Collection

October

  • Fall Colours
  • Pinetum
  • Synoptic Shrub Collection

November

  • Witch-Hazel
  • Pinetum
  • Synoptic Shrub Collection

Bloom times can vary from year to year as they are influenced by many natural events including temperature and climate. As Please bear in mind that if we experience an early or late spring, bloom times could shift up to 10 days earlier or 10 days later.

Upcoming Activities & Tours at the Arboretum

Some events may require pre-registration, and may not be covered by your garden admission. For a full listing of events across all RBG’s gardens, visit the Events Calendar.

Arboretum FAQ

Directions / Parking

The Arboretum is located at 16 Old Guelph Road, Hamilton ON.

A $10 parking flat rate applies when the parking lot is staffed.  Metered parking is in effect beyond staffed hours, $5/hr to a maximum of $15. Parking is FREE to RBG members with a RBG parking pass

Learn more about getting to RBG at rbg.ca/directions

Hours

The Arboretum is open to visitors year-round, functioning as a paid garden area during peak-bloom, and a trailhead throughout the rest of the year.

2022 Hours:

  • January to May 4: 8 a.m. to dusk
  • May 5 to June 1: 9:30 a.m. to 5 p.m.
  • June 2 to December 31: 8 a.m. to dusk

Some holiday hours may apply. See rbg.ca/visitus for details.

How Far is the Arboretum from RBG’s Other Garden Areas?

  • Arboretum to Rock Garden: 1.7 km / 1 mile
  • Arboretum to Laking Garden: 2.4 km / 1.5 miles
  • Arboretum Hendrie Park/RBG Centre: 3.7 km / 2.3 miles

Walking to and from the Arboretum is NOT recommended; Old Guelph Road does not include sidewalks. Please consider driving or biking between locations, or using the shuttle service when available (weekends, spring to mid-summer).

Are there Washroom Facilities Available?

Portable washrooms are available at the Arboretum.

Are water bottle filling stations available?

Water Fountains / bottle filling stations are available at all RBG garden areas.

At the Arboretum, outdoor bottle refill available at the Nature Interpretive Centre.

Food and Drink / Picnics

Pack a picnic blanket! RBG’s food trailer will be operating on-site at the Arboretum with a selection of delicious grab-and-go fare available for purchase.

  • Thursday, May 26: 4 to 8 p.m.,
  • Friday, May 27: Closed
  • Saturday, May 28 & Sunday, May 29: 11 a.m. to 8 p.m.

Outside food is permitted at the gardens during regular hours (restrictions apply during specific special events). Please pack-out or properly dispose of any waste. Outdoor cooking is not permitted in any of RBG’s garden areas.

Is the Arboretum Accessible?

The lilac walk at the arboretum is paved / packed gravel, though most of the Arboretum is grassy field, or rough trail pathways. Descending into the lower lilac dell includes a steep slope, not recommended for those with mobility issues.

Trail User Code

Upon entering the nature trails you are making a pledge to respect the environment and fellow visitors. These lands are Canada’s biodiversity hotspot, set aside at the head of Lake Ontario for environmental protection, open for environmental education and passive recreation only. While walking our trails, it is important to remember that you are a visitor in someone else’s home, and that your impact will be multiplied over by 200,000 other visitors. Environmental protection bylaws are posted at each trailhead. Please follow them and play a role in protecting and restoring the area for future generations.

Trail Use Bylaw Restrictions

The properties and activities are regulated by the Royal Botanical Gardens Act and supporting bylaws.

  1. Trail running is not permitted.
  2. Pets must remain leashed at all times. Please clean up after your dogs and leave waste trailhead garbage receptacle.
  3. Bicycles are prohibited on the trails.
  4. Motorized vehicles are prohibited.
  5. Horseback riding is prohibited.
  6. Picking or collecting plants or wildlife is prohibited.
  7. Feeding the wildlife/birds is not permitted.
  8. Cross-country skiing is prohibited due to the hilly topography.
  9. Ice skating is restricted to Cootes Paradise in the area adjacent to Princess Point.
  10. Use of drones is prohibited under RBG bylaw and further regulated by NavCanada.

Can I Bring My Dog?

Leashed dogs are permitted in the gardens for a visit during regular operating hours. Please be responsible and clean up after your dog. Dogs must remain on-leash and on-trail at all times.

Some special events at this location may not accommodate dogs. These are noted in the individual event FAQ’s available on the event pages.