General Plant Information (Edit)
Plant Habit: Shrub
Life cycle: Perennial
Sun Requirements: Full Sun to Partial Shade
Water Preferences: Wet Mesic
Mesic
Soil pH Preferences: Very strongly acid (4.5 – 5.0)
Strongly acid (5.1 – 5.5)
Moderately acid (5.6 – 6.0)
Slightly acid (6.1 – 6.5)
Neutral (6.6 – 7.3)
Minimum cold hardiness: Zone 7a -17.8 °C (0 °F) to -15 °C (5 °F)
Maximum recommended zone: Zone 9a
Plant Height: 4 to 5 feet
Plant Spread: 4 to 5 feet
Leaves: Evergreen
Flowers: Showy
Flower Color: Pink
Other: Pale Pinkish-white to deep Rose-pink
Bloom Size: 1"-2"
Flower Time: Late winter or early spring
Spring
Late spring or early summer
Underground structures: Taproot
Uses: Windbreak or Hedge
Cut Flower
Wildlife Attractant: Bees
Butterflies
Propagation: Other methods: Cuttings: Tip
Layering
Other: Tissue Culture
Containers: Needs excellent drainage in pots
Awards and Recognitions: RHS AGM

Image
Common names
  • Rhododendron

Photo Gallery
Location: Howick Hall garden, Northumberland, UK
Date: 2014-05-25
Location: Botanical Garden Münster (Germany)
Date: 2016-05-12
Location: Botanical Garden Münster (Germany)
Date: 2016-05-12
Location: Belmonte Arboretum (Wageningen, The Netherlands)
Date: 2022-05-01
Location: Belmonte Arboretum (Wageningen, The Netherlands)
Location: Belmonte Arboretum (Wageningen, The Netherlands)
Location: Howick Hall garden, Northumberland, UK
Date: 2014-06-08

Photo courtesy of Singing Tree Gardens Nursery
  • Uploaded by Joy

Photo courtesy of Singing Tree Gardens Nursery
  • Uploaded by Joy
Location: RHS Harlow Carr gardens, Yorkshire, England UK 
Date: 2021-04-10
Rhododendron williamsianum

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