Osti's Tree Peony
Also known as: Paeonia ostii
What's special about Osti's Tree Peony
White-flowered Chinese tree peony — used for medicinal root bark.
Growing this variety
Osti's Tree Peony follows the same growing basics as Peony. Variety-specific maturity above; everything else below applies to the whole Peony family.
Germination
Spacing & depth
How to plant
Consult species-specific guidance. Most benefit from good drainage, patience, and matching zone.
Grower's tip
Long-lived perennials — plant crowns shallow (eyes 1–2 in deep). Seed-grown plants take 5–7 years to first bloom.
Soil preferences
Well-drained garden soil. Native/wildflower species prefer lean soil; cutting flowers prefer richer beds.
6.0–7.0
Work 1 in of compost into beds before sowing. Skip nitrogen fertilizer on wildflowers — it favors foliage over blooms.
Watering
1 in per week during establishment, drought-tolerant once rooted for most species.
Deep, infrequent soakings at the base. Overhead water on ornamentals promotes botrytis and rust.
Overwatered: rotted crowns, mildew, floppy stems. Underwatered: small blooms, curled leaves, quick fade.
Prefers top-watering — Top-water at the base in the morning. Overhead water batters open flowers and spreads botrytis on tightly-packed blooms.
Temperature tolerance
60–80°F (16–27°C) ideal for most annuals
50–65°F (10–18°C)
Cool-season annuals (larkspur, poppy, snapdragon) tolerate light frost; warm-season annuals (zinnia, cosmos, marigold) are frost-tender.
Container growing
Possible with the right cultivar
8–14 in (20–35 cm) wide
Compact and dwarf types do best in pots; tall cutting flowers need staking.
Succession planting
Sow cutting flowers (zinnia, cosmos, sunflower) every 3 weeks through midsummer for continuous cut stems.
Detailed harvesting
Cut in early morning when stems are turgid. For cutting varieties, harvest when the bud is just showing color and 1–2 outer petals have opened.
Post-harvest storage & preservation
Immediately re-cut stems underwater and place in clean cool water for 4 hrs before arranging. Petals can be dried on screens for potpourri or crafts.
Culinary, medicinal & other uses
Cut flowers, dried arrangements, pollinator habitat, edible garnishes (borage, nasturtium, calendula, viola).
Medicinal or traditional uses are shared for interest only — this is not medical advice. Consult a qualified professional before using any plant medicinally.
Seed saving
Mostly insect-pollinated (outcrossing).
For pure strains, isolate 150–800 ft or bag heads. Wildflower mixes are meant to cross freely.
Stop deadheading favorite blooms; let heads dry brown and rattling on the stem, then collect into a paper bag.
Your zone's planting calendar
Pick your USDA hardiness zone and we'll estimate the key dates for peony in your area. These are regional averages — always check your own last-frost forecast before sowing.
My Osti's Tree Peony Peony notes
Osti's Tree Peony Peony seeds on hand
Track packets and loose seeds you already have. Private to your account.
Par level — leave at 0 for no alert. Anything below par shows on Seed Starting and your shopping list.
From your kitchen — grow peony from what you already have
Deadhead less. Let the best blooms fade and set seed on the plant — that's your next year's packet.
- 1Mark 2–3 of your favorite flowers with a bit of yarn and stop deadheading them.
- 2Wait until the seed head or pod dries fully on the plant — brown, papery, and rattling.
- 3Cut whole heads into a paper bag on a dry day; shake or rub to free seed.
- 4Sieve out chaff and store cool and dry in a labeled envelope.
Storage: 2–5 years for most flower seed.
Order more seeds
Running low? Reorder from one of these seed stores.
Loading…
Other Peony varieties
Anomalous Peony
Siberian species — early bloom, deep pink flowers.
Brown's Peony
Native western North American peony — nodding maroon flowers.
California Peony
Winter-growing native peony — dormant in summer.
Father Delavay's Tree Peony
Shrubby tree peony with maroon single flowers.
Chinese Peony
The classic garden peony — parent of most modern hybrids.
Caucasian Peony
Pale-yellow single flowers — famously slow but prized.
Woodland Peony
Shade-tolerant Asian species with pink single flowers.
Garden Paeony (Banat)
European wild ancestor of many old cottage peonies.
Rock's Peony
Tree peony with dramatic dark blotches at petal bases.
Moutan Peony
Classic Chinese tree peony — huge flowers on woody stems.
Fernleaf Peony
Feathery ferny foliage with early crimson flowers.
Whittmann's Peony
Pale-yellow Caucasian species.