Family: Orchidaceae (or-kid-AY-see-ee) (Info)
Genus: Cypripedium (sip-rih-PEE-dee-um) (Info)
Grex name: Ulla Silkens
Additional cultivar information: (Cypripedium flavum X Cypripedium reginae)
Hybridized by Petersen; Year of Registration or Introduction: 1996
 5 members have or want this plant for trade.
Category:
Perennials
Height:
6-12 in. (15-30 cm)
12-18 in. (30-45 cm)
18-24 in. (45-60 cm)
Spacing:
18-24 in. (45-60 cm)
Hardiness:
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:
Light Shade
Danger:
Unknown - Tell us
Bloom Color:
Pink
White/Near White
Bloom Time:
Late Spring/Early Summer
Foliage:
Herbaceous
Leathery-Textured
Other details:
Requires consistently moist soil; do not let dry out between waterings
Soil pH requirements:
6.1 to 6.5 (mildly acidic)
6.6 to 7.5 (neutral)
7.6 to 7.8 (mildly alkaline)
Patent Information:
Unknown - Tell us
Propagation Methods:
By dividing rhizomes, tubers, corms or bulbs (including offsets)
Seed Collecting:
N/A: plant does not set seed, flowers are sterile, or plants will not come true from seed
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