Pronounciation: Jazz-MI-num MES-nee-i
Landscape Use: Trail over fences, walls, or embankments, flower accent, oriental landscape design themes, local historical landscape gardens, Chinese and Japanese gardens.
Form & Character: Spreading, sprawling, informal, stiff, yet refined.
Growth Habit: Evergreen, herbaceous perennial semi-vining shrub that needs support unless grown as a bank cover. Without support, primrose jasmine sprawls lke a small Yellowstone geyser to around 5 to 10 feet in height and width.
Foliage/Texture: Opposite, glaborus dark green trifoliate leaves, each 1 to 3 inches long, green stems angular to square becoming woody with age; medium texture.
Flowers & Fruits: Flowers are trumpet-shaped with open yellow flower petals that are borne in early spring on wood grown the previous summer. Flowers can be semi-double with 6-10 petals per flower, almost 2 inches across, and sweetly fragrant; fruit inconspicuous.
Seasonal Color: A beautiful full display of yellow flowers in early spring, flowers are fragrant.
Temperature: Cold tolerant in Phoenix, yet is stressed by the hottest of Phoenix summer days.
Light: Full sun to partial shade, no western exposures.
Soil: Tolerant of some alkalinity. Grows best in a rich organic soil that is well drained.
Watering: In Phoenix, primrose jasmine needs ample water during the summer months in particular.
Pruning: Prune only lightly after bloom by heading back or singly removing older canes. DO NOT SHEAR!!!
Propagation: Softwood stem cuttings are relatively easy to root under mist. In moist situations, branches will often take root with prolonged ground contact.
Disease and pests: None
Additional comments: Primrose jasmine is found in older parts of the Phoenix area in landscapes with other plant materials from several decades ago. In today's world of local desert landscaping with native plant materials, primrose jasmine is a bit of a historical plant of interest for period piece landscape gardens. 'Full Moon' and 'Gold Tip' (variegated) are outstanding cultivars.