Data specific to Peonies (Edit)
Originator/Registrant: William Gratwick
Year of Registration or Introduction: 1960
Cultivar Group (Type): Suffruticosa Tree Peony
Season of bloom: Early (week 2)
Flower Form: Single
Flower Color: Lavender
Flower color description: Blend of cream, pink and lavender with purple flares.
Flower size: Large
Needs support: No

General Plant Information (Edit)
Plant Habit: Shrub
Life cycle: Perennial
Sun Requirements: Full Sun to Partial Shade
Water Preferences: Mesic
Minimum cold hardiness: Zone 4a -34.4 °C (-30 °F) to -31.7 °C (-25 °F)
Maximum recommended zone: Zone 8b
Fruit: Dehiscent
Flowers: Showy

Image
Common names
  • Rockii Hybrid Tree Peony
  • Tree Peony
  • Peony

Photo Gallery
Location: My garden, Toronto, Ontario
Date: 2017-05-30
Location: European-American tree peony bed, W E Upjohn Peony Garden, Nichols Arboretum, Ann Arbor
Date: 2018-05-24
There's a dynamic quality to the blooms, as though the petals are
Uploaded by NMay
Location: My garden, Toronto, Ontario
Date: 2017-05-28
Location: My garden, Toronto, Ontario
Date: 2021-05-21
Location: My garden, Toronto, Ontario
Date: 2021-05-21
Location: European-American tree peony bed, W E Upjohn Peony Garden, Nichols Arboretum, Ann Arbor
Date: 2018-05-26
This plant is one of the tallest of all the 150+ tree peony plant
Location: My garden, Toronto, Ontario
Date: 2021-05-22
Location: My garden, zone 4 Wisconsin
Date: 2016-05-26
Location: My garden, Toronto, Ontario
Date: 2016-05-27
Location: European-American tree peony bed, W E Upjohn Peony Garden, Nichols Arboretum, Ann Arbor
Date: 2018-05-23
Beauty in details - note how the two-tone coloration of the filam
Location: European-American tree peony bed, W E Upjohn Peony Garden, Nichols Arboretum, Ann Arbor
Date: 2019-05-27
Buds in the cool light of early morning, complete with overnight
Location: My garden, Toronto, Ontario
Date: 2021-05-22
Location: My garden, Toronto, Ontario
Date: 2017-05-30
Location: My garden, zone 4 Wisconsin
Date: 2016-05-26
Location: Arboretum of the Barnes Foundation, Merion Station, Pennsylvania USA
Date: 2018-05-12
Location: Arboretum of the Barnes Foundation, Merion Station, Pennsylvania USA
Date: 2018-05-12
Location: Arboretum of the Barnes Foundation, Merion Station, Pennsylvania USA
Date: 2018-05-12

Date: 2011-02-03
Courtesy Peony Paradise
  • Uploaded by vic
Location: My garden, Toronto, Ontario
Date: 2021-05-23
Location: My garden, Toronto, Ontario
Date: 2021-05-23
Location: My garden, zone 4 Wisconsin
Date: 2016-05-26
Location: Arboretum of the Barnes Foundation, Merion Station, Pennsylvania USA
Date: 2018-05-12

Date: 2021-05-07
Uploaded by Jasmin
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