Peony 'Bartzella' - Itoh Peony
Peony 'Bartzella' - Itoh Peony

Peony 'Bartzella' - Itoh Peony

SKU: F35389
1 for $40.00
Quick Facts
Common Name: Intersectional or Itoh Peony
Hardiness Zone: 4-8S/W Exposure: Sun
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Blooms In: May-Jun
Mature Height: 48" Spacing: 4'
Read our Growing Guide Ships as: BAREROOT
Fragrance: Yes Deer Resistance: Yes
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Shipping Details Shipment begins in late October 2023, depending on your zone. See shipping tab for details
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Product Details

Product Details

We have rarely been more excited about a plant than we are about this hybrid Peony.  'Bartzella' is a cross between a herbaceous and a Tree Peony (known as Intersectional or Itoh Peonies), a horticultural feat that has proved remarkably difficult to accomplish. The result is a stunningly beautiful variety whose deep sulphur yellow flowers, each with red flames at the center, are carried on a plant that looks and behaves like a very big, healthy herbaceous Peony.  'Bartzella' bears dozens of huge flowers (9" across) on strong stems, above rich green foliage. There are very few yellows in the herbaceous Peony world, and none can compare with 'Bartzella' in beauty or performance.

The quest for this elusive marvel began in Japan in the 1950s, but it was Roger Anderson, an amateur breeder in Wisconsin, whose 12 patient years of crosses between species finally hit the jackpot in 1980. (He didn't see 'Bartzella' bloom until 1986.) Since then, few plants have made it to the market. We have a handful of plants available for delivery this fall.




The size of the plants we ship has been selected to reduce the shock of transplanting. For some, this means a large, bareroot crown. Others cannot travel bareroot or transplant best if grown in containers. We ship these perennials and annuals in 1 pint pots, except as noted. We must point out that many perennials will not bloom the first year after planting, but will the following year, amply rewarding your patience. We ship bulbs as dormant, bare bulbs, sometimes with some wood shavings or moss. Shrubs, Roses, vines, and other woody plants may be shipped bareroot or in pots. The size of the pot is noted in the quick facts for each item.


We ship our bulbs and plants at the right time for planting in your area, except as noted, with orders dispatched on a first-come, first-served basis by climate zone. We also ship a wide range of containers and planters, tools, supplies, fertilizers, garden wear, garden decor items, as well as indoor decorations like wreaths and dried bouquets when available. Estimated dates for shipping are indicated in the green Shipping Details box for each item. Please supply a street address for delivery. Kindly contact us with two weeks notice, if you'll be away at the expected time of delivery.


We guarantee to ship plants that are in prime condition for growing. If your order is damaged or fails to meet your expectations, we will cheerfully replace or refund it. Please contact our Customer Service Department at 1-800-503-9624 or email us at [email protected]. Please include your order number or customer number when contacting us.



Average Customer Rating: 5 out of 5 stars (9 Reviews) Write a Review

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Planted fall of 2020 and I am so excited to see the first one bloom today! Last year I just got the greens, and I didn't actually mulch over the winter so I was a bit worried, but it came back this year with five flower buds.

2 of 2 people found this review helpful. Do you? yes no  Certified buyer


Bought this beauty 3 years ago. First year gave 3 blooms, 2 years later am eagerly awaiting the opening of 32 buds! Gorgeous!

11 of 12 people found this review helpful. Do you? yes no  Certified buyer


I am SO excited to finally have 3 blooming flowers on my Bartzella Peonia!! I bought my first 3 about 6 years ago and my sweet husband pulled up some “crazy weird roots” in the spring ...needless to say he was in the doghouse after he threw them away. Luckily, he didn’t find the third and I am so pleased with the results!! He did repurchase some new ones the next fall, but they are a little behind. I have waited years for them to bloom and - oh my - has the wait been worth it. They are amazing, but what I enjoy most is that they disappear in the winter, so I can plant winter flowers in its place. In the spring, it shoots out amazing green foliage - QUICKLY! It’s so exciting. This is the best purchase I have ever made from WFF. Wait - that’s not true at all. I love everything I get from WFF!!

16 of 16 people found this review helpful. Do you? yes no

A Lemon Yellow Wonder

I have had this peony in my flower garden since 2013, and it has been a really wonderful bush! This is the second year of blooms, last year it had 2 blooms on it and this year I've counted 9! The flowers are a deep lemon color and the largest so far has been 5 inches across. The flower has a nice fragance if you sniff an individual flower. I didn't stake the bush this year, so the stems are bending with the weight of the flowers. Next year they'll get staked so that the flowers will show to it's full glory.

18 of 20 people found this review helpful. Do you? yes no

Bloomed first year, can't wait till next

This is my first tree Peony and so far so good. I got one beautiful yellow bloom this first year. It still seems happy and I'm looking forward to see what next year brings.

6 of 7 people found this review helpful. Do you? yes no

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Growing guide

Growing guide
Print Grow Guide


No garden is complete without these imposing plants, which are covered with sumptuous flowers in May and June. True perennials, Herbaceous Peonies may live for fifty years or so, becoming more impressive over time. Peonies are easy to grow and will reward you with armfuls of cut flowers and a splendid show in the garden. They make striking specimen plants, play nicely with other perennials in the garden, and are ideal for bordering a walk or driveway. Early-, mid- and late-blooming varieties are available to extend the flowering season, some of which are fragrant. Peonies are grown in Zones 3 to 8; in the South, they will flower in Alabama but the limit appears to be cooler areas of Zone 8. Southern gardeners should choose early-flowering singles for the best success.

Pronunciation: pay-oh'-nee-ah

Light/Watering: Plant Herbaceous Peonies in full sun except in the South and the warmest parts of the West, where afternoon shade is appreciated and will help the flowers last longer on the plant. An inch of water a week throughout the growing season is recommended.

Fertilizer/Soil and pH: Well-drained soil rich in organic matter is desirable. If your soil is extremely acid, add a few handfuls of calcitic lime at planting time. Plant the roots with the eyes (the pink or white buds at the top of the roots) pointing up and cover with one to two inches of soil in the North and no more than one inch in the South. (Please note: If the eyes are set deeper than recommended, plants may not bloom. For this reason, do not mulch over the crowns.) Don't be surprised if there are few or no flowers the first spring after planting; plants generally take a few years to settle in and bloom heavily. Peonies respond well to an annual sidedressing of one inch of compost or aged manure; no other fertilization is necessary. Many Peonies, certainly the double-flowered varieties, must be staked to prevent a thunderstorm from pushing their blooms into the mud. Set the supports in place as new growth begins to emerge in early spring.

Pests/Diseases: Few insect pests bother Herbaceous Peonies, but a fungal disease called botrytis may be a problem, especially in very wet seasons. The stems of Peonies develop cankers or blacken at the base and fall over or simply wilt. Leaves may show black or brown patches and buds may turn brown and fail to open. Good culture and sanitation in the garden can help prevent or correct these problems. Plants need good drainage and air circulation, so do not crowd. Remove any affected foliage at the first sign of disease and deadhead religiously, removing all flower parts and petals from the garden. Cut off all foliage just below soil level after a killing frost in the fall and remove it and any debris from the area -- do not compost. If botrytis was present the previous spring, add a shallow layer of sand around the plants and crowns and spray newly emerging shoots with Bordeaux mix or lime sulfur following label directions. Fungal spores overwinter at the base of the plants, and spring rains then splash the spores up onto the new shoots. Removing any debris and old foliage and covering the soil with sand helps prevent reinfection.

Another blight known as phytophthora may also appear, but the two diseases are hard to tell apart. Take a sample to your USDA Cooperative Extension Service agent or a specialist if you suspect phytophthora, as this disease is usually fatal to the plant and infected plants should be dug up and destroyed, and the soil replaced before replanting.

Peonies can be susceptible to powdery mildew in summer. The white, powdery mildew fungus covers the leaves to varying degrees, but seems to have little effect on the vigor of the plant. This can be avoided or diminished by planting in full sun and providing ample air circulation around the plants.

Companions: Peonies flower with Roses and Clematis and are lovely with many other perennials; be sure to leave room around the plants for air circulation. White-flowered Peonies are entrancing against a background of evergreens. Spring-flowering bulbs such as Crocus vernus or Scilla siberica create a pleasing color contrast at the feet of emerging Herbaceous Peonies stems, which are often reddish.

Reflowering: Many varieties make several side buds that will open after the terminal bloom flowers, so deadheading is beneficial. After each flower is finished, cut the stem underneath the old bloom, leaving the foliage alone. If exhibition-sized flowers are desired, remove the side buds as they form and leave only the terminal bud.

Dividing/Transplanting: Generally Herbaceous Peonies do not need dividing and some resent it. However, if you must move an established plant you need to divide it before replanting. Do this in the fall, after all foliage has died back completely. Each division should have three to five eyes, and it will usually take a couple of years for the new plants to flower.

End-of-Season Care: Foliage of Herbaceous Peonies should be cut back in the fall and removed from the premises to discourage overwintering of pests. Mulch new plants with evergreen boughs or salt marsh hay after the ground freezes.

Calendar of Care

Early Spring: Water plantings well if spring rains don't do it for you. Side dress plants with compost or aged manure. If botrytis blight was present the previous season, cover ground around plant with a thin (one-quarter inch) layer of sand and spray new shoots with Bordeaux mix or lime sulphur. Set stakes or other supports in place now.

Mid-Spring: Watch for signs of botrytis blight and treat as needed, removing any diseased tissue immediately. Train through plant supports as plants grow. Remove side buds if exhibition-size blooms are desired.

Late Spring: Deadhead Peonies religiously and remove all fallen petals or blooms from the garden.

Summer: Herbaceous Peonies do best with an inch of water a week.

Fall: Cut stems of Herbaceous Peonies back to soil level and remove from the area. Dig and divide plants now if necessary. Mulch new plantings with evergreen boughs or salt marsh hay after the ground freezes.



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