Double Flowering Japanese Kerria | Kerria japonica 'Plenifolia'

Double Flowering Japanese Kerria | Kerria japonica 'Plenifolia'

The Plant Factory Choice | RHS Award of Garden Merit | Zones 4-9

Why Double Flowering Japanese Kerria is Trending in 2026

• A tried-and-true performer with an RHS Award of Garden Merit — proven reliable in gardens across Zones 4-9 for generations
• Golden pompom blooms smother arching branches from early spring through summer, with sporadic rebloom into fall
• One of the few flowering shrubs that blooms prolifically in partial to full shade — the go-to solution for difficult shaded spots
• Rapid growth rate fills borders, hedges, and problem areas fast — delivering the mature, established look you want in less time
• Four-season landscape asset: golden spring blooms, lush green summer foliage, bright yellow fall color, vivid green winter stems

What This Plant Does For You

Double Flowering Japanese Kerria is the kind of plant that earns its place in the garden and keeps it for decades. Gardeners who have grown it know it as one of the most dependable flowering shrubs available — a true tried-and-true performer that delivers season after season without fuss. The perfectly formed golden-yellow pompom blooms are unlike anything else in the spring garden, covering graceful arching branches in a cascade of color that stops traffic. And unlike most flowering shrubs that demand full sun, Kerria thrives and blooms prolifically in shade — solving the problem of those difficult north-facing foundations, woodland edges, and shaded borders where most plants simply refuse to perform. Plant it once and enjoy decades of reliable golden beauty.

Plant Highlights

• Botanical Name: Kerria japonica 'Plenifolia'
• Award: RHS Award of Garden Merit
• Brand: The Plant Factory Choice
• Growing Zones: 4-9 (cold hardy to -30°F)
• Mature Height: 6+ feet | Mature Width: 6+ feet
• Bloom Color: Double-petaled golden-yellow pompom flowers
• Bloom Season: Early spring through summer; sporadic rebloom into fall
• Foliage: Light green; bright yellow fall color
• Winter Interest: Vivid green arching stems
• Light: Full sun to full shade — blooms well in shade
• Water: Occasional once established; tolerates dry and wet conditions
• Growth Rate: Rapid
• Deer Resistant: Yes | Pollinator Friendly: Yes | Reblooming: Yes
• Grown by: The Plant Factory — nursery grown

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Premium Features & Solutions

Most flowering shrubs demand full sun to perform. Kerria 'Plenifolia' is the rare exception — it blooms prolifically in partial to full shade, making it the definitive solution for shaded borders, woodland edges, and north-facing foundations that leave most gardeners frustrated. Its rapid growth rate means it fills problem areas quickly and decisively. Tolerates poor soils, dry or wet conditions, and extreme temperatures from -30°F to summer heat. This is a plant that has stood the test of time in gardens across the country — and it will do the same in yours.

Choose Your Size: The Premium Quart is the smart budget-friendly starter for mass plantings and large-scale projects — same elite genetics at a lower price point. The 1 Gallon is the professional value-performance sweet spot — established root system, blooms the first season, fills its space within 1-2 seasons. The 2 Gallon is our landscape-ready Best Value — the most mature specimen for immediate visual impact, focal points, and anywhere results matter from day one.

Smart Growing Guide

Beginner — Step-by-Step:

• Choose a spot in full sun to full shade — Kerria is one of the few shrubs that blooms well in shade, ideal for north-facing foundations and woodland edges
• Dig a hole twice as wide as the root ball, same depth; enrich with organic compost if available
• Plant so the top of the root ball is level with surrounding soil — never bury the crown
• Space plants 4-6 feet apart for specimens, 3-4 feet apart for hedges and mass plantings
• Water thoroughly at planting and regularly through the first season; once established, Kerria is quite drought tolerant
• Apply 2-3 inches of organic mulch around the base, keeping it away from the stems
• Feed in early spring with SR-18-5-10 slow-release fertilizer as buds swell
• Prune lightly after the primary bloom flush in late spring — avoid pruning in late summer or fall as this removes next season's flower buds

Advanced — Optimization Tips:

• Kerria blooms on previous season's wood (old wood) for the primary spring flush — never prune in late summer or fall
• Prune immediately after the primary bloom flush to shape and encourage vigorous new growth for next season's flowers
• The suckering habit can be used strategically for mass planting naturalization — or manage by removing unwanted suckers at the base
• Division of established clumps in early spring is an effective propagation method for expanding plantings
• In Zone 4, site in a sheltered location and mulch heavily before first frost for added root protection
• Can be trained as a small tree or espaliered against a wall for a unique, architectural effect
• Avoid high-nitrogen fertilizers which promote foliage over flowers; stick to balanced slow-release formulas

Pro Tips for Maximum Impact

• Plant in drifts of 3-5 along a fence line, woodland edge, or shaded border for a golden spring river of color that stops traffic
• Use Fill My Box savings to order multiple plants at 15% off — Kerria is most spectacular in mass plantings
• Pair with spring bulbs (daffodils, tulips) for a layered early-season color display that bridges winter and summer
• The vivid green winter stems provide structure and color in the dormant landscape — site where they can be seen from windows or walkways
• Use the 2 Gallon size for instant hedges or foundation plantings where a mature, finished look is needed from day one

Frequently Asked Questions

Is Double Flowering Japanese Kerria a proven performer?
Yes — it holds the RHS Award of Garden Merit and has been a trusted staple in gardens across Zones 4-9 for generations. It is one of the most dependable flowering shrubs available, delivering reliable golden blooms season after season.

What size should I buy?
The 2 Gallon is our landscape-ready Best Value — the most mature specimen for immediate results. The 1 Gallon is the value-performance sweet spot for most applications. The Quart is ideal for mass plantings and large-scale projects. Use Fill My Box savings to maximize your investment.

How does Fill My Box work?
Add 2 or more Double Flowering Japanese Kerria plants to your cart and the discount applies automatically at checkout — 15% off 2 plants, 25% off 4, and 30% off 6. No code needed.

Will it bloom in shade?
Yes — this is one of Kerria's defining advantages. Unlike most flowering shrubs, it blooms prolifically in partial to full shade, making it the go-to solution for shaded borders, woodland edges, and north-facing foundations.

What zones does it grow in?
Zones 4-9, cold hardy to -30°F. One of the hardiest flowering shrubs available for northern gardens.

When does it bloom?
The primary flush runs from early spring through summer. Sporadic rebloom continues into fall. The vivid green stems provide winter ornamental interest.

Does it stay green in winter?
The foliage is deciduous and drops in fall after turning bright yellow. However, the vivid green arching stems remain through winter, providing structure and color in the dormant landscape.

How fast does it grow?
Rapid. Established plants can add 2-3 feet of growth per season under optimal conditions, making it excellent for quickly filling problem areas and establishing hedges.

Is it deer resistant?
Yes. Double Flowering Japanese Kerria is deer resistant, making it a reliable choice for landscapes with deer pressure.

When should I prune it?
Prune immediately after the primary bloom flush in late spring to early summer. Never prune in late summer or fall — this removes next season's flower buds, which form on the previous season's wood.

Can I use it as a hedge?
Yes. Space plants 3-4 feet apart for a fast-filling hedge. The 2 Gallon size delivers an immediately mature, finished hedge from day one. Use Fill My Box savings to make large hedge projects more economical.

Does it spread?
Kerria has a suckering habit that can be used strategically for mass planting naturalization. Unwanted suckers can be easily removed at the base to keep the plant contained.

Ordering:
Our processing time is typically 1-3 days after receiving your order. Orders placed after 4:00 PM Wednesday through Sunday ship the following Monday.

Shipping:
Plant Factory Direct uses proven shipping processes to ensure quick, safe delivery every time. Cold or heat events may prompt a brief hold on your order until conditions are safe for your zip code — protecting your investment and ensuring you receive a healthy, viable plant. Summer holds above 95°F | Winter holds below 34°F. Not available to: AK, HI, PR.

Note: The images and videos on our site are the best way to show off our products and show how good we are as growers. Depending on the season you buy, you may get a plant that is smaller or bigger than the picture shows. The plant might bloom like it does on our site, but it might not. We cut off the blooms most of the time because they don't ship well. When you buy our plants, think of them as an investment in your future garden, and enjoy the process of seeing it grow to its fullest.