Photo by Melody

PlantFiles: Krimson Princess Hoya, Wax Plant, Porcelain Flower
Hoya carnosa 'Rubra'

Family: Asclepiadaceae (ass-kle-pee-ad-AY-see-ee) (Info)
Genus: Hoya (HOY-a) (Info)
Species: carnosa (kar-NO-suh) (Info)
Cultivar: Rubra
Additional cultivar information: (aka Krimson Princess, Strawberries and Cream)
Hybridized by Cobia; Year of Registration or Introduction: 1970

22 members have or want this plant for trade.

Tropicals and Tender Perennials
Vines and Climbers

8-10 ft. (2.4-3 m)

3-6 in. (7-15 cm)

USDA Zone 10b: to 1.7 C (35 F)
USDA Zone 11: above 4.5 C (40 F)

Sun Exposure:
Light Shade


Bloom Color:
White/Near White

Bloom Time:
Mid Summer
Late Summer/Early Fall
Mid Fall


Other details:
Flowers are fragrant
This plant is suitable for growing indoors
Average Water Needs; Water regularly; do not overwater
Suitable for growing in containers

Soil pH requirements:
6.1 to 6.5 (mildly acidic)
6.6 to 7.5 (neutral)

Patent Information:

Propagation Methods:
From herbaceous stem cuttings
From woody stem cuttings

Seed Collecting:
Allow pods to dry on plant; break open to collect seeds
Seed does not store well; sow as soon as possible

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2 positives
1 neutral
No negatives

Gardeners' Notes:

Positive jskyieeyes3 On Sep 11, 2010, jskyieeyes3 from Saint Cloud, FL (Zone 9b) wrote:

i've had my hoya rubra for a little over a year. it was one of my starter plants. i love the colorful foliage, and the "tropical" feel it adds to my porch. it hasn't flowered yet, but i'm waiting patiently! =)

Positive ceedub On Dec 6, 2004, ceedub from Whitby, ON (Zone 5b) wrote:

I've had this plant for about 7 years. The varegated foliage with green on the edges is lovely, but the flowers are what totally amazed me. It is a cultivar of carnosa, which normally has pale pink flowers with a darker centre - the flowers of this plant are a dark, almost raspberry colour, with the centres being very, very dark. They have a very light scent compared with some of my other hoyas.

Neutral PanamonCreel On Oct 20, 2003, PanamonCreel from Celaya
Mexico (Zone 10a) wrote:

Hoya carnosa 'Rubra' is said to be a cultivar of Hoya carnosa var. picta. It can be distinguished by the green leaf borders. It was a patented variety put out by Cobia in Florida (U.S.) The patents expired about 25 years ago. It was more commonly sold by its trademarked name "Hoya Krimson Princess."


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

San Francisco, California
Brooksville, Florida
Chiefland, Florida
Saint Cloud, Florida
Tampa, Florida
Whitestone, New York
Zanesville, Ohio
Verona, Pennsylvania
Houston, Texas
Humble, Texas
Lake Jackson, Texas

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