Skip to content
Open Today: 10 a.m. to 5 p.m. All Hours

What’s in Bloom? June at RBG

May 25, 2026

What Blooms in June?

Note: this is a general guide of what typically blooms this month at RBG. Bloom periods may vary by up to 2 weeks. For the best view of what’s blooming right now at RBG, see the current photos on RBG’s Instagram, or find the “Bloom Watch” section on the What’s in Bloom page.

A rainbow of blooms spreads across the gardens! 

At the Arboretum, early-June brings Kousa Dogwood, Beautybush, Cinquefoil and Weigela. Along RBG’s trails, the wildflowers of June are highlighted by the Blue Flag Iris (Iris versicolor) and White Water Lily (Nymphaea odorata) found throughout the wetlands.

At Rock Garden, discover showy perennials like False Indigo, Columbine and Cranesbill. The first of the roses start to appear in Hendrie Park, alongside companion plants like Butterflyweed and Ornamental Onions. 

  • white water lilies and lily pads
  • IMG_0091 copy
  • 2025_RoseGarden_0616_06
  • Rock_250616_11

Pictured, left to right: White Waterlily, Blue Flag Iris, Ornamental Onion, False Indigo

Later in the month, Rock Garden comes into its own with displays of flourishing perennials, including Ornamental Onions, Sages, and Coralbells. The Weigelas, Stewartia, and Japanese Snowbells bloom in the canopy understory and lush conifers are showing off a wide variety of developing cones.

The Rose Garden bursts into bloom with the first full flush of the year, showcasing disease-resistant, cold-hardy and drought-tolerant Roses, including several Canadian introductions which can be found at local growers. 

  • Rock_250616_Stewartia_02
  • Cornus Dogwood Arboretum
  • Huchera Coral Bells
  • vibrant pink

Pictured, left to right: Stewartia, Dogwood, Coralbells, Rose

June closes with more beautiful perennials across the gardens, including Lavender, Smooth and Oakleaf Hydrangea, Yarrow, Astilbe, Hibiscus, and the first of the Coneflowers. With different textures of ornamental grasses, trees, shrubs and the sounds of the water features, the gardens are a treat to all your senses.

  • 2025_RoseGarden_0630_08
  • Large grouping of English Lavender plants
  • Oakleaf Hydrangea
  • Achillea ‘Anthea’ (Yarrow) – Laking Garden

Pictured, left to right: Coneflower, Lavender, Hydrangea, Yarrow

June Favourites

Shrub roses in full bloom by the gazebo structure in the Rose Garden

Roses

Mid to End of June

The rose collection features multiple flushes mid-June through fall, alongside companion plants that bloom throughout the season. 

The Rose Garden is located in Hendrie Park.

Plants that typically flower in June at RBG

  • Astilbe
  • Beautybush
  • Butterflyweed
  • Canada Anemone
  • Cinquefoil
  • Coneflower
  • Coralbells
  • Cranesbill
  • Dogwood
  • False Indigo
  • Fleeceflower
  • Horse Chestnut
  • Hosta
  • Hydrangea
  • Japanese Snowbell
  • Lavender
  • Lindheimer’s Beeblossom
  • Milkweed
  • Ornamental Onion (Allium)
  • Rose
  • Salvia
  • Sunflower family
  • Tulip Tree
  • Waterlily
  • Weigelia
  • Yarrow

Bloom times vary. Check our social media feeds for what’s in bloom currently! 

Blooms by Season

Plants of interest are ever-changing in RBG’s five cultivated garden areas and nature sanctuaries. Learn what’s blooming now or see the blooms calendar for a rough estimation of what to expect each season.