There’s something quietly regal about the moment a Gold-Tipped Swallowtail peony opens its petals — layers of soft white blooms edged in luminous gold, each flower stretching nearly seven inches across. This is a Rockii tree peony, and it rewards your patience with a presence that feels genuinely rare in the Pacific Northwest garden.
You’ll receive a dormant bareroot plant, two to three years old with two to three branches, shipped at ten to twenty-five inches tall. By spring, expect growth reaching around three feet. Plant in fertile, well-drained soil with neutral to slightly alkaline pH, in a spot with partial shade. Water moderately during establishment — evenly moist, never waterlogged. Hardy in USDA zones 4–9, it’s built for cold winters; a light layer of mulch protects roots in harsher climates.
Rockii tree peonies ship bareroot in fall (September–November) only — this is when planting yields the strongest establishment and most reliable bloom.
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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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