Common NameIntersectional Peony Paeonia Bartzella

Height30.0-36.0 Inches

Spread30.0-36.0 Inches

Hardiness Zones4,5,6,7,8,9


Flower ColorYellow Shades

Foliage ColorGreen shades

SunlightFull Sun (> 6 hrs. Direct Sun), Part Shade (4-6 hrs. Direct Sun)

Water RequirementsLow Water Needs, Average Water Needs

Soil QualityFertile Soil Quality


Soil ChemistryNeutral Soil (pH = 7.0)

BloomtimeLate Spring

Critter ResistantDeer Resistant, Rabbit Resistant

Seasonal InterestDried Seed Heads

Growth RateMedium


Garden StyleCottage, Eclectic, Formal

Other FeaturesBorder Plant, Cut Flower, Cut Foliage, Dried Flower, Drought Tolerant, Easy To Grow, Fragrant Flowers, Fragrant Foliage, Specimen, Focal Point

OriginNot Native to North America


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