Kronprinsesse Mary, close-up of the flower
Photo: © Poulsen Roser A/S (official variety photo)
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Floribunda (Castle® collection)Poulsen (Mogens Olesen), 2004Yellow

Kronprinsesse Mary

POULCAS018; cream-yellow quartered rosettes; strong scent; bred for the royal wedding of Frederik and Mary (2004).

Named after Crown Princess Mary of Denmark

Variety profileGardeners' photos

Variety profile

Flowering

Repeat, continuous in flushes through the season

Awards

Nantes 2010

Prix d'Honneur (France)

Winter hardiness

−23 °C

USDA zone 6b–9. South and centre of Ukraine; in the north — with cover. South and centre of Ukraine · in the north, with winter protection.

Compare reference temperatures

Plant size

60–100 × 60–80 cm
person 170 cm60–100 cm
Habit
Moderate, upright and bushy, slightly spreading
Dimensions
60–100 cm high × 60–80 cm wide
Support
Not needed
Shoots
Strong
Branching
Good

Flower

≈ 5 cm

130 petals.

Bud shape
Urn-shaped
Open flower
Old-fashioned quartered rosette, very double; diameter ~5 cm
Centre
Quartered, a warmer buttery yellow
Fullness
Very double (~130 petals)
Flower carriage
In sprays of 7–11 buds, less often singly

Fragrance

Strong; fresh perfumed scent of an old-fashioned rose

Disease resistance

4 out of 5
Black spotmoderatePowdery mildewmoderateRustmoderate

Above average — to powdery mildew, rust, black spot and botrytis.

Sun

Full sun

Tolerates light shade.

Thorns

Moderate
thornlessfewmoderatemanyvery many

Moderate prickliness (~12 thorns per 10 cm of shoot).

Foliage

Glossy, dark green, healthy.

All characteristics in a table
Group
Floribunda (Castle® collection)
Breeder
Poulsen (Mogens Olesen), Denmark, 2004
Bud shape
Urn-shaped
Open flower
Old-fashioned quartered rosette, very double; diameter ~5 cm
Centre
Quartered, a warmer buttery yellow
Colour
Cream-yellow: ivory-cream with a buttery centre; fades to almost white at the edges
Fullness
Very double (~130 petals)
Flower carriage
In sprays of 7–11 buds, less often singly
Flowering
Repeat, continuous in flushes through the season
Fragrance
Strong — fresh perfumed scent of an old-fashioned rose
Hips
Does not set hips
Habit
Moderate, upright and bushy, slightly spreading
Branching
Good
Shoots
Strong
Thorns
Moderate prickliness (~12 thorns per 10 cm of shoot).
Dimensions
60–100 cm high × 60–80 cm wide
Support
Not needed
Foliage
Glossy, dark green, healthy
Resistance
Above average — to powdery mildew, rust, black spot and botrytis
Variations of the variety
Part of the Castle® Poulsen garden collection

Colour scheme

Cream-yellow: ivory-cream with a buttery centre; fades to almost white at the edges

Rose neighbours

The Pilgrimsoft yellowCharlottecream yellowClaire Austincreamy whiteMunstead Wooddark raspberry · contrast

Perennials to plant nearby

Catmintsky blueSage 'Caradonna'purplePerovskialavender hazeDelphiniumblue

Neighbouring roses

Yellow and cream varieties keep the same soft 'creamy' mood around Kronprinsesse Mary.

The PilgrimCharlotteClaire AustinMunstead Wood

Companion perennials

Blue and purple flowers give a clean contrast to the cream yellow:

catmintsage 'Caradonna'perovskiadelphinium

Contrasting accents

Blue delphinium spikes and a lavender 'haze' deepen the warm yellow palette:

DelphiniumNepeta Six Hills GiantPerovskia

More about the variety

Hips
Does not set hips
Variations of the variety
Part of the Castle® Poulsen garden collection

How to grow

Where to plant. In a formal flower bed, in the front or second row of a mixed border, beside seating areas (for the scent); excellent for cutting thanks to its quartered form.

Climate. South and centre of Ukraine — no protection needed; in the north — winter cover (USDA zone 6b).

Care. Moderate; full sun, nutrient-rich soil; good health makes care easier; feed twice per season.

About the name

Name. After the Danish crown princess Mary — Mary Elizabeth Donaldson (born 1972 in Hobart, Australia), who married Crown Prince Frederik on 14 May 2004, and in January 2024 became Queen of Denmark. The Danish house Poulsen presented the rose for the royal wedding.

Breeding. Bred by Mogens Olesen for Poulsen Roser (Denmark): crossed in 1996, introduced in 2004. Patent code POULCAS018. Parentage: unnamed seedling × 'Poulsyng' (Clair Renaissance).

Significance. A Danish royal commemorative floribunda from the Castle® collection — an old-fashioned quartered form, strong scent and good health; in 2010 it was awarded the Prix d'Honneur in Nantes.

Frequently asked questions about Kronprinsesse Mary

Does Kronprinsesse Mary need winter protection?

The cultivar’s reference temperature is −23 °C (USDA zone 6b–9). Overwintering depends on the conditions. South and centre of Ukraine; in the north — with cover.

How many times a season does Kronprinsesse Mary flower?

Repeat, continuous in flushes through the season.

How big does Kronprinsesse Mary grow?

60–100 cm tall, 60–80 cm wide.

Which diseases affect Kronprinsesse Mary?

Overall resistance: 4 out of 5. Above average — to mildew, rust, spot and botrytis.

How much sun does Kronprinsesse Mary need?

Full sun; tolerates light shade.

What does Kronprinsesse Mary smell like?

Strong — fresh perfumed scent of an old-fashioned rose.

Gardeners' photos and reviews

My climate

Choose a reference temperature to compare with the cultivar’s data. This is not an overwintering forecast or advice on winter protection; consider wind, moisture and the duration of frost.

Regional data are generalised. USDA describes average annual extreme minima, not a forecast; the values in the list are rounded. Check the conditions at your site. More information: Roses in Ukraine's climate.