Hybrid rockii, Rock's Peony, Tree Peony 'Xue Lian'

Paeonia rockii

Family: Paeoniaceae
Genus: Paeonia (pay-OHN-ee-uh) (Info)
Species: rockii (ROK-ee-eye) (Info)
Cultivar: Xue Lian
Hybridized by Unknown
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6-8 ft. (1.8-2.4 m)


4-6 ft. (1.2-1.8 m)


USDA Zone 4a: to -34.4 C (-30 F)

USDA Zone 4b: to -31.6 C (-25 F)

USDA Zone 5a: to -28.8 C (-20 F)

USDA Zone 5b: to -26.1 C (-15 F)

USDA Zone 6a: to -23.3 C (-10 F)

USDA Zone 6b: to -20.5 C (-5 F)

USDA Zone 7a: to -17.7 C (0 F)

USDA Zone 7b: to -14.9 C (5 F)

USDA Zone 8a: to -12.2 C (10 F)

USDA Zone 8b: to -9.4 C (15 F)

Sun Exposure:

Sun to Partial Shade


Unknown - Tell us

Bloom Color:

White/Near White

Bloom Time:

Late Spring/Early Summer



Other details:

Unknown - Tell us

Soil pH requirements:

Unknown - Tell us

Patent Information:

Unknown - Tell us

Propagation Methods:

Unknown - Tell us

Seed Collecting:

Unknown - Tell us

Foliage Color:

Unknown - Tell us

Bloom Characteristics:

Flowers are good for cutting

Flowers are fragrant

Water Requirements:

Average Water Needs; Water regularly; do not overwater

Where to Grow:

Unknown - Tell us


This plant has been said to grow in the following regions:

Jamestown, Ohio

Wilkes Barre, Pennsylvania

Veradale, Washington

Gardeners' Notes:


On Mar 14, 2008, rebecca101 from Madison, WI (Zone 5a) wrote:

Cricket Hill's description:

This is a cultivar of the tree peony commonly known in the U.S. as "Joseph Rock". It is named for the botanist who first brought seeds of this type of peony from northern China to America early in the 20th century. The Chinese grow more than 100 variations of white rockii tree peonies. This particular one, known as "Snow Lotus" is very fast growing and extremely hardy.
Flowers are white with dark maroon- purple flares at the petal base. Flowers are 8-10" in diameter, in the lotus form and are held well above the foliage. Flowers have a dense, sweet fragrance. All rockii hybrids are vigorous and tall growing, and extremely floriferous. Expect these plants to grow to 4 ft. wide and 5 ft. tall by their 10th year ( 5 yrs. or so after planting).... read more