Learn how to grow peonies — from choosing herbaceous, tree, and intersectional types to planting at the correct depth, seasonal care, and the reasons peonies can live for a century in the same spot.
Few perennials match the peony for sheer floral impact. Those enormous, fragrant blooms — ruffly doubles in white, cream, pink, coral, red, and purple — arrive in late spring with the force of a theatrical entrance, filling the garden with fragrance and the vase with some of the most extraordinary cut flowers available to the home gardener. And then, equally theatrically, they’re gone — a brief two to three weeks of spectacular performance, followed by a summer of handsome dark green foliage that holds its own in any border.
What makes peonies genuinely exceptional is their longevity. A well-planted peony can thrive in the same spot for 50, 75, even 100 years — there are documented peony plantings in New England that predate the Civil War. They are one of the most long-lived perennials in horticulture, and the investment in getting the planting right pays dividends for a lifetime.
At Outz News Garden, Maria Walker walks through everything about growing peonies — understanding the three main types, the planting depth that determines success or failure, annual care, supporting the heavy blooms, and avoiding the foliage diseases that occasionally plague them. For more long-lived perennials that anchor a spring and summer border alongside peonies, see our guides on growing hostas and low-maintenance perennial flowers.
The Three Types of Peonies
According to Penn State Extension’s peony guide, peonies offer a host of features for choosing the one or ones best suited to your garden and aesthetic style. They are cold-hardy, deciduous perennial shrubs that grow best in temperate to cold climates with consistent precipitation and do well in USDA plant hardiness zones 3 to 8. PSU identifies three main groups:
Herbaceous Peonies — The Classic Garden Peony
Herbaceous peonies are fleshy and die completely to the ground in winter — their buds for new growth are underground and emerge in early spring as distinctive red or pink “eyes.” Penn State Extension specifies that the common garden peony (Paeonia lactiflora) is the standard herbaceous form found in most home gardens and is available in a variety of flower forms and colors.
Flower forms within herbaceous peonies:
- Single: one row of petals surrounding a center of yellow stamens — the most pollinator-friendly form and the most fragrant of all types
- Japanese/anemone: outer guard petals surrounding a center of modified, petal-like stamens
- Semi-double: two to three rows of petals with visible stamens
- Double: fully packed with petals, no visible stamens — the classic “ball gown” peony; the largest and most impressive; needs staking due to weight
- Bomb: guard petals surrounding a raised, globe-shaped center of tightly packed smaller petals
Best herbaceous varieties by color:
- White: ‘Festiva Maxima’ (fragrant double; red flecks); ‘Bowl of Cream’ (enormous creamy white double)
- Pink: ‘Sarah Bernhardt’ (classic large pink double; outstanding cut flower); ‘Kansas’ (hot pink; extremely vigorous)
- Red: ‘Karl Rosenfield’ (deep red double; excellent cut flower); ‘Chocolate Soldier’ (dark red semi-double)
- Coral/salmon: ‘Coral Charm’ (semi-double; remarkable coral color that shifts to peach as it opens; extremely popular)
Tree Peonies — Woody, Winter-Hardy Shrubs
Penn State Extension specifies that the tree peony (P. suffruticosa) is a multi-stemmed woody shrub whose woody stems are maintained year-round and buds for next year’s growth are located on the stems — making it distinctly different from herbaceous peonies. Tree peonies bloom 2 to 3 weeks earlier than herbaceous types, often in late April to early May. They can reach 4 to 6 feet tall and wide at maturity, with enormous flowers sometimes exceeding 12 inches in diameter.
Tree peonies tolerate full sun to dappled shade — PSU Extension notes their large flowers may last longer in less intense sunshine. They are long-lived and somewhat slow-growing but reward patience with spectacular performance for decades. Hardy in Zones 4 to 9.
Intersectional (Itoh) Peonies — The Best of Both
Itoh peonies are hybrids between herbaceous and tree peonies, combining the die-to-the-ground habit of herbaceous types with the flower colors (including yellow, gold, and bicolors unavailable in herbaceous types) and stronger stems of tree peonies. Penn State Extension identifies intersectional hybrids as blooming last in the peony succession — after woodland peonies, then tree peonies, then herbaceous peonies — extending the overall peony season.
Outstanding Itoh varieties: ‘Bartzella’ (semi-double yellow; outstanding fragrance), ‘Cora Louise’ (white with lavender flares), ‘Garden Treasure’ (canary yellow). More expensive than herbaceous peonies but increasingly available and considered by many specialists as the finest garden peonies available today.
Site Requirements: What Peonies Need to Thrive for a Century
Penn State Extension specifies that proper planting or dividing of peony roots is the key to successful flowering and that autumn is the best time to plant peonies, since it coincides with the beginning of the plant’s dormancy. Before choosing a site, understand what peonies need most:
Sunlight
Penn State Extension is specific: peonies prefer full sun, especially the herbaceous species and intersectional hybrids. They need a minimum of 6 hours of direct sun daily for reliable abundant flowering. Plants in partial shade produce fewer, smaller flowers on weaker stems. The early-blooming woodland peony is the exception — it prefers spring sun and summer shade, making it suitable for spots beneath deciduous trees that leaf out after the peony blooms.
Soil and Drainage
- Well-draining soil essential: peonies planted in waterlogged soil develop crown rot — one of the few things that can kill an otherwise long-lived peony. Excellent drainage is non-negotiable.
- Fertile, loamy soil preferred: add 2 to 3 inches of compost before planting. Penn State Extension’s perennial care guide recommends incorporating organic matter such as leaf mold or compost when planting peonies to improve soil texture and water-holding capacity.
- Soil pH 6.0 to 7.0: slightly acidic to neutral; consistent with most well-maintained garden soils
- No competition from tree roots: plant away from large trees whose roots compete for moisture and nutrients. Peonies planted too close to tree root zones struggle consistently.
Cold Requirements
Herbaceous peonies need cold winters to bloom — they require a period of temperatures below 40°F to break dormancy and initiate flower bud development. This makes them outstanding perennials for northern gardens (Zones 3 to 7) but challenging in warm climates (Zone 8 and warmer) where insufficient winter chill limits flowering.
Planting Peonies: The Depth Rule That Determines Everything
Planting depth is the single most critical factor in peony performance — and the most common reason peonies fail to bloom. The rule is precise and non-negotiable:
The Planting Depth Rule for Herbaceous Peonies
According to University of Maryland Extension, for herbaceous peonies planted as divisions or bare-root “eyes,” the eyes (buds) must be positioned no deeper than 1½ to 2 inches below the soil surface in most of the US (Zone 6 and warmer). Penn State Extension specifies that proper planting depth is the key to successful flowering.
- Planted too shallow (crown at soil surface or above): exposed to freeze-thaw damage and desiccation; may bloom erratically or produce weak plants
- Planted at the correct depth (eyes 1 to 2 inches below soil surface): reliable annual blooming, strong root development, maximum longevity
- Planted too deep (eyes more than 2 inches below surface): the most common mistake. Peonies planted deeply may produce lush foliage but few or no flowers — sometimes for years. The plants are alive and growing but the insufficient cold signal received by buried crowns inhibits flower bud formation. PSU Extension is explicit: peonies must be replanted at the proper depth of 1½ inches.
- Cold climate exception: in Zone 4 and colder, plant eyes 2 inches below the surface for additional protection from hard freezes.
Planting Steps for Bare-Root Peonies
- Prepare the planting hole 18 to 24 inches wide and 12 to 18 inches deep
- Amend backfill soil with compost; ensure excellent drainage in the base of the hole
- Build a small mound of amended soil in the center of the hole at the correct depth to support the root
- Position the bare-root division with eyes pointing upward at the correct depth — measure carefully
- Backfill with amended soil; firm gently to eliminate air pockets
- Water thoroughly
- Mark the location — bare-root peonies planted in fall are invisible until spring emergence
- Allow 2 to 3 years for newly planted peonies to establish fully and begin blooming reliably
Container-Grown Peonies
Container-grown peonies can be planted in spring or fall — plant at the same depth as in the container. Be certain the eyes are no more than 1 to 2 inches below the soil surface after settling.
Seasonal Care
Watering
Established peonies are moderately drought-tolerant once their deep root systems are fully developed (typically by year 3 or 4). During the first two seasons, water regularly to support establishment. During active growth and the lead-up to bloom, consistent moisture produces the largest, most impressive flowers. Water deeply at the base — wet foliage promotes botrytis blight, the most common peony disease.
Fertilizing
University of Maryland Extension notes that most perennials do not need much fertilizer — overfertilized perennials produce excessive soft growth and very few flowers. For peonies, a modest annual application of balanced fertilizer (10-10-10) in early spring as foliage emerges, plus a light topdressing of compost, provides all the nutrition a well-established plant needs. Avoid high-nitrogen fertilizers — they promote lush foliage at the expense of flowering.
Staking
Double-flowered peony varieties produce blooms so heavy that stems flop to the ground when wet — particularly after rain. Install support rings, wire hoops, or bamboo-and-twine cages around plants in early spring before stems grow through them. This approach, allowing stems to grow up through a support ring, is far less visible than trying to stake after flopping has occurred. Single and Japanese flower forms are much more self-supporting and rarely need staking.
Disbudding for Larger Flowers
University of Maryland Extension notes that peonies are commonly disbudded — a technique of removing small side buds to direct all the plant’s energy into fewer, larger terminal flowers. For garden display, disbudding is optional. For cut flowers or exhibition blooms, removing all side buds when they are pea-sized leaves only the terminal bud and produces significantly larger individual flowers.
Deadheading
Remove spent flowers promptly after blooming — snip off the flower head at the base of the stem, leaving the foliage and stem intact. The foliage remains attractive and continues photosynthesizing through summer, building energy reserves in the crown for next year’s bloom. Healthy peony foliage through summer is a sign the plant is thriving.
Fall Care and Winter Preparation
University of Maryland Extension specifies that spring and summer bloomers should be divided after they bloom, either in late summer or fall as the foliage dies down. For general fall care:
- Cut back herbaceous peony foliage to the ground in fall after it dies back from frost — this removes the overwintering sites for botrytis fungus that overwinters in old stems and debris
- Remove and compost (or discard if disease was present) all cut-back stems and fallen leaves from around the crown
- Do not mulch over peony crowns for winter — mulch trapping moisture against the crown promotes disease. Leave the crown area clear.
- Tree peonies: do not cut back — their woody stems carry next year’s buds. Only remove any winter-killed stem tips after new growth confirms what is dead.
Dividing Peonies
According to University of Minnesota Extension, peonies have deep, fleshy roots that break easily and can be tricky to dig up — and they must be replanted at the proper depth of 1½ inches. It can take a few years before divisions become established enough to bloom. This is why peonies are typically divided only when necessary — they perform best and bloom most reliably when left undisturbed for many years.
When to Divide
Divide only when necessary: when a clump has grown enormous and you want to propagate a plant you love; when center performance has declined significantly; or when moving an established plant to a new garden location. UMN Extension specifies that peonies with fleshy roots are best divided in fall. Divide 4 to 6 weeks before the ground freezes — this allows time for the root system to begin establishing before winter dormancy.
Division Process
- Carefully dig up the entire plant — work out from the crown to avoid cutting the fleshy roots
- Wash soil from the roots to see the crown structure clearly
- Allow the exposed crown to dry for a few hours — slightly desiccated roots are less brittle and cut more cleanly
- Using a sharp, clean knife, cut the crown into sections — each division needs at least 3 to 5 eyes (pink to white colored buds) and a substantial root system attached
- Divisions with only 1 to 2 eyes will be slow to establish and may not bloom for 3 to 5 years
- Replant at the correct depth immediately; water thoroughly
- Expect reduced or no flowering for 2 to 3 years as divisions re-establish
Common Peony Problems
- No flowers (lush foliage only): the most common peony problem. Almost always caused by planting too deeply. Carefully dig and replant at the correct depth — 1 to 2 inches below the surface. Other causes: insufficient sun (need 6+ hours), plants too young (allow 3 years for new plantings), or excessive shade from surrounding plants.
- Botrytis blight (gray mold, wilting shoots, brown-spotted buds): the most common peony disease — a fungal infection that causes stems to wilt, buds to blacken and fail to open, and gray mold on affected tissue. Prevention: excellent air circulation, water at the base only, thorough fall cleanup removing all stems and debris. In severe cases, apply a fungicide labeled for botrytis on peonies early in the season before buds develop.
- Ants on buds: the most misunderstood peony phenomenon. Ants are attracted to the sweet nectar secreted by peony buds — they do not damage the plants and do not need to be controlled. The old myth that peonies need ants to open their buds is false; they open perfectly well without ant activity.
- Failure to establish after transplanting: expect reduced bloom for 2 to 3 years after moving peonies. Patience is essential — disturbed peonies re-establish slowly but surely.
Quick-Reference Peony Growing Guide
- Eyes no deeper than 1 to 2 inches below soil surface — the most critical planting rule
- Full sun — 6 hours minimum — partial shade reduces bloom significantly
- Well-draining soil — waterlogged crowns rot
- Plant in fall for best establishment — bare-root divisions establish beautifully when planted in September to October
- Allow 2 to 3 years for new plantings to bloom — patience is essential
- Stake double-flowered varieties in spring before stems need it
- Cut foliage to ground in fall — removes overwintering disease sites
- Never mulch over the crown — promotes disease
- Divide in fall, only when necessary — peonies do best undisturbed
Growing peonies successfully rewards patience and precise planting with one of the most magnificent flowering experiences in the entire perennial garden — and with plants that may genuinely outlive the gardener who plants them. The brief window of bloom each late spring, when those enormous fragrant flowers open in succession over two to three weeks, is one of the garden year’s most anticipated and celebrated events.
Plant them correctly — eyes no deeper than 2 inches, full sun, excellent drainage — allow them three seasons to settle into their new home, and discover why gardeners have been growing peonies in the same spots for generations. The investment in doing it right the first time pays dividends for a lifetime.
Share your peony varieties and bloom photos in the comments — especially any multi-generational plants! And for other long-lived spring perennials that bloom alongside peonies, see our iris growing guide and our daylily guide.
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Maria Walker is a certified horticulturist and gardening specialist with over 15 years of hands-on experience in plant care, garden design, and sustainable growing practices.
She holds a Bachelor’s degree in Horticulture Science and a Master’s degree in Sustainable Agriculture — and has spent her career helping people of all skill levels create beautiful, thriving gardens.
Maria launched Outz News Garden with one simple mission: to make gardening accessible and inspiring for everyone, from first-time planters to seasoned green thumbs.