There’s something quietly theatrical about watching Ivory Flame (Zong Ban Xue Fei) open for the first time — petals the color of heavy cream edged with the faintest blush, unfolding to nearly eight inches across. This is a Rockii tree peony (*Paeonia rockii*), and it carries that lineage with elegance: ancient Chinese garden heritage in a plant that’s genuinely built for Pacific Northwest winters.
Your bareroot plant arrives 2–3 years old with 2–3 established branches. Give it a spot with partial shade, fertile well-drained soil that leans neutral to slightly alkaline, and consistent moisture during establishment — evenly moist, never waterlogged. Hardy through USDA zones 4–9, it’s quite cold-tolerant; a light layer of mulch in harder winters is all it asks. By spring it reaches around three feet, and blooms reliably year after year.
🍂 Shipping & planting window
Peonies ship in fall (September–November) when fully dormant and bare root.
Fall planting gives roots a full season to establish in warm soil before winter. Cold stratification triggers strong, healthy spring growth and reliable bloom production. Spring-shipped peonies experience root damage during active growth, transplant shock during their bloom cycle, and often lose an entire growing season.
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