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" across on average.
Healthy green foliage similar to that of a tree peony forms an impressively sturdy clump to 3' 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:
Grade #1 Bare Root |
Height:
30.0-36.0 Inches
Spread:
30.0-36.0 Inches
Hardiness Zones:
4,5,6,7,8,9
Flower Color:
Yellow/Gold Shades
Foliage Color:
Green shades
Sunlight:
Full Sun (> 6 hrs. Direct Sun) Part Shade (4-6 hrs. Direct Sun)
Water Requirements:
Low Water Needs Average Water Needs
Soil Quality:
Fertile Soil Quality
Soil Chemistry:
Neutral Soil (pH = 7.0)
Bloomtime:
Late Spring
Critter Resistant:
Deer Resistant Rabbit Resistant
Seasonal Interest:
Dried Seed Heads
Growth Rate:
Medium
Garden Style:
Cottage Eclectic Formal
Other Features:
Border Plant Cut Flower Cut Foliage Dried Flower Drought Tolerant Easy To Grow Fragrant Flowers Salt Tolerant Specimen Focal Point
Origin:
Not Native to North America
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.
Container:
Premium 2 Gallon Pot
Finish:
8-9 weeks
Growing Temperature:
55-60 degrees F
Soil PH:
6.5-7.0
EC (What is EC?):
1.5-2.5 pour through method
Fertility:
Over-fertilization will inhibit flowering. Fertilize with 100-150 ppm of 20-10-20 at every other watering. Make sure nitrogen levels are low.
Pests & Diseases:
Nematodes, Japanese beetles, rose chafer and rose leaf beetles, ants, scales, flower thrips, southern root-knot nematodes.
Impatiens necrotic spot virus, peony ringspot virus, leaf spots, red spot(Cladosporium), stem rots(Sclerotinia), Verticillium wilt, Botrytis blight, Phytophera blight, rot(Sclerotium), peony blotch(Septoria), root rot(Armillaria, tree peonies), stem wilt(Leptospaeria, tree peonies), anthracnose(Gleosporium), bacterial crown gall(Agrobacterium), powdery mildew, bud blast(improper culture, climate), oedema.
In the landscape, ants are attracted to the nectar on the buds. It does not create any problem, however.
Potting & Timing:
Can trim lower roots to fit container.
Planting peonies in the fall will result in improved flowering the following spring. If planting in the spring, it is important to grow peonies cool in order to yield stronger plants. Once new roots are established, you can increase the temperature for forcing. Excessively high temperatures can lead to leaf curl in spring planted peonies. Leaf curl is usually the result of environmental factors. If temperatures are too high, there are not enough roots to support the plant.
Moisture:
For potting soil use commercial planting media.
Paeonia need good drainage for disease control. Do not water plants that are stressed when they are actively growing or flowering.
Planting Level:
Eyes should be planted no more than 2 inches below soil level.
Other Comments:
Why Peonies might fail to flower
If no buds appear:
Royal Horticultural Society's Award of Garden Merit -- 2012
American Peony Society Grand Champion National Exhibitions -- 2002
American Peony Society Gold Medal -- 2006
American Peony Society Award of Landscape Merit -- 2009
Pennsylvania Horticultural Society Gold Medal Plant -- 2021
Height:
30.0-36.0 Inches
Spread:
30.0-36.0 Inches
Hardiness Zones:
4,5,6,7,8,9
Flower Color:
Yellow/Gold Shades
Foliage Color:
Green shades
Sunlight:
Full Sun (> 6 hrs. Direct Sun) Part Shade (4-6 hrs. Direct Sun)
Water Requirements:
Low Water Needs Average Water Needs
Soil Quality:
Fertile Soil Quality
Soil Chemistry:
Neutral Soil (pH = 7.0)
Bloomtime:
Late Spring
Critter Resistant:
Deer Resistant Rabbit Resistant
Seasonal Interest:
Dried Seed Heads
Growth Rate:
Medium
Garden Style:
Cottage Eclectic Formal
Other Features:
Border Plant Cut Flower Cut Foliage Dried Flower Drought Tolerant Easy To Grow Fragrant Flowers Salt Tolerant Specimen Focal Point
Origin:
Not Native to North America
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.
Container:
Premium 2 Gallon Pot
Finish:
8-9 weeks
Growing Temperature:
55-60 degrees F
Soil PH:
6.5-7.0
EC (What is EC?):
1.5-2.5 pour through method
Fertility:
Over-fertilization will inhibit flowering. Fertilize with 100-150 ppm of 20-10-20 at every other watering. Make sure nitrogen levels are low.
Pests & Diseases:
Nematodes, Japanese beetles, rose chafer and rose leaf beetles, ants, scales, flower thrips, southern root-knot nematodes.
Impatiens necrotic spot virus, peony ringspot virus, leaf spots, red spot(Cladosporium), stem rots(Sclerotinia), Verticillium wilt, Botrytis blight, Phytophera blight, rot(Sclerotium), peony blotch(Septoria), root rot(Armillaria, tree peonies), stem wilt(Leptospaeria, tree peonies), anthracnose(Gleosporium), bacterial crown gall(Agrobacterium), powdery mildew, bud blast(improper culture, climate), oedema.
In the landscape, ants are attracted to the nectar on the buds. It does not create any problem, however.
Potting & Timing:
Can trim lower roots to fit container.
Planting peonies in the fall will result in improved flowering the following spring. If planting in the spring, it is important to grow peonies cool in order to yield stronger plants. Once new roots are established, you can increase the temperature for forcing. Excessively high temperatures can lead to leaf curl in spring planted peonies. Leaf curl is usually the result of environmental factors. If temperatures are too high, there are not enough roots to support the plant.
Moisture:
For potting soil use commercial planting media.
Paeonia need good drainage for disease control. Do not water plants that are stressed when they are actively growing or flowering.
Planting Level:
Eyes should be planted no more than 2 inches below soil level.
Other Comments:
Why Peonies might fail to flower
If no buds appear:
Royal Horticultural Society's Award of Garden Merit -- 2012
American Peony Society Grand Champion National Exhibitions -- 2002
American Peony Society Gold Medal -- 2006
American Peony Society Award of Landscape Merit -- 2009
Pennsylvania Horticultural Society Gold Medal Plant -- 2021
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