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Paeonia 'Bartzella'

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Photo Courtesy of Walters Gardens, Inc.
 Common Name: Peony-Intersectional

Considered by many to be Roger Anderson’s best Intersectional Peony introduction.  We have to agree, this plant gets a gold star in our book! 

A mature plant of ‘Bartzella’ is incredibly elegant looking, with flowers neatly spaced on the top and sides of the clump.  Established clumps can produce 80 or more flowers apiece!  The semi-double to double, pastel yellow flowers have a small rose purple flare in the center and a pronounced sweet fragrance.  They measure 6-8 inches across on average. 

Healthy green foliage similar to that of a tree peony forms an impressively sturdy clump to 3ft tall and wide.  Unlike some garden peonies, the foliage of this plant looks great from spring through fall and is substantial enough to be grown in place of a small shrub in the landscape.

Intersectional peonies are a relatively new class of Paeonia created by crossing herbaceous garden types with woody tree types.  They are often called “Itoh Peonies” because the original cross was first made successfully by Japanese nurseryman Mr. Toichi Itoh in 1948.  Sadly, he passed away before ever seeing one of his crosses bloom.  Since that time, other hybridizers have continued his work including American breeder Roger Anderson.

Intersectional Peonies offer the best qualities of both garden and tree peonies combined including:

  • Very large, tree peony-like flowers in colors not previously seen in herbaceous types
  • Healthy, herbaceous foliage similar to tree peonies but with a robust, bushy habit that does not require staking
  • Strong, herbaceous stems that hold the flowers upright even after a heavy rain; makes a better landscape plant than older herbaceous peonies
  • A longer bloom time due to additional flowers being produced on side shoots
  • Extreme winter hardiness like herbaceous types but with increased vigor

Breeder: Roger Anderson

Origin: Not Native to North America

Characteristics:



Height:
  30-36 Inches
Spread:
  30-36 Inches
Flower Color:
  Yellow Shades
Foliage Color:
  Green shades
Hardiness Zone:
4,5,6,7,8,9
Find Your Zone
Sun or Shade?:
  Full sun (> 6 hrs. direct sun)
  Part shade (4-6 hrs. direct sun)
Wet or dry?:
  Low water needs
  Average water needs
Need critter resistant plants?:
  Deer resistant
  Rabbit resistant
How fast should it grow?:
  Medium
When should it bloom?:
  Late spring
How's your soil?:
  Fertile Soil
Sweet or Sour Soil?:
  Neutral Soil (pH = 7.0)
What's your garden style?:
  Cottage
  Formal
  Eclectic

Attributes:

Border plants
Cut flower or foliage
Dried flower or seed heads
Drought Tolerant
Fragrant flowers or foliage
Specimen or focal point
Easy to grow

Awards:

  American Peony Society Grand Champion National Exhibitions 2002
  American Peony Society Gold Medal 2006
  American Peony Society Award of Landscape Merit 2009
  Royal Horticultural Society's Award of Garden Merit 2012

Homeowner Growing & Maintenance Tips:

The most critical aspect of planting peonies is proper planting depth. For intersectional peonies, the crown should be planted 1½ - 2 inches below soil level. If the eyes have already begun to grow, they may stick up above the soil a bit after planting the crown below soil level.

A permanant, sunny or partly shady site is ideal for intersectional peonies. Protection from afternoon sun and from harsh winds will help to prolong the lives of the the exotic flowers. Peonies will perform best in well-drained, evenly moist, rich soil with a pH near neutral and they are drought-tolerant once established.

An annual topping of compost is recommended each fall. Though peonies may be slow to establish, you can be assured that they are developing a deep, substantial root system which will help to produce flowers that are well worth the wait. Once established, peonies can live 50 years or more.

 


Companions:

Common/Botanical Name
Zones  
Nepeta faassenii 'Six Hills Giant'
Common Name: Catmint
3,4,5,6,7,8
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Digitalis purpurea 'Dalmatian Purple'
Common Name: Foxglove
4,5,6,7,8,9
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Dicentra 'King of Hearts'
Common Name: Bleeding Heart-Fern-leaved
5,6,7,8,9
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Dianthus 'Dragon Fruit' PP21894
Common Name: Pinks
4,5,6,7,8,9
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Delphinium grandiflorum 'Blue Butterfly'
Common Name: Delphinium-Dwarf
3,4,5,6,7
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While every effort has been made to describe this plant accurately, please keep in mind that the height, bloom time, and color may differ in various climates throughout the country. The description of this plant was written based on our experience growing it in Michigan (USDA hardiness zone 5) and on numerous outside resources.