There’s something almost theatrical about the moment “Dazzling Flame” opens — those enormous, semi-double blooms in deep crimson-red unfurl to nearly 9 inches across, with ruffled petals that seem to glow in the shifting light of a spring afternoon.
This Rockii Tree Peony arrives as a dormant bareroot plant, 2–3 years old with 2–3 established branches. Shipped in fall at 10–25 inches tall, it settles quietly into your garden before pushing to roughly 3 feet by its first active spring. Hardy through USDA zones 4–9, it handles cold winters with ease — mulch lightly in colder climates and ensure the soil drains well so roots never sit wet.
Give it partial shade, moderate and even moisture during establishment, and fertile, well-drained soil with a neutral to slightly alkaline pH. Tree peonies reward patience with decades of reliable bloom.
Fall shipping runs September through November — the only window that gives roots a full season to anchor before winter.
🍂 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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