Oxypetalum Species, Southern Star
Oxypetalumcoeruleum

Family: Apocynaceae (a-pos-ih-NAY-see-ee)
Genus: Oxypetalum (oks-ee-PET-al-um)
Species: coeruleum (ko-er-OO-lee-um)

Synonym:Amblyopetalum coeruleum

Synonym:Gothofreda coerulea

Synonym:Tweedia coerulea

Synonym:Tweedia versicolor

Category

Vines and Climbers

Water Requirements

Drought-tolerant; suitable for xeriscaping
Average Water Needs; Water regularly; do not overwater

Sun Exposure

Sun to Partial Shade

Foliage

Smooth

Foliage Color

Blue-Green

Height

12-18 in. (30-45 cm)
18-24 in. (45-60 cm)
24-36 in. (60-90 cm)
36-48 in. (90-120 cm)

Spacing

15-18 in. (38-45 cm)
18-24 in. (45-60 cm)

Hardiness

USDA Zone 8a: to -12.2 °C (10 °F)
USDA Zone 8b: to -9.4 °C (15 °F)
USDA Zone 9a: to -6.6 °C (20 °F)
USDA Zone 9b: to -3.8 °C (25 °F)
USDA Zone 10a: to -1.1 °C (30 °F)
USDA Zone 10b: to 1.7 °C (35 °F)

Where to Grow

Unknown

Danger

Unknown

Bloom Color

Light Blue
Blue-Violet

Bloom Characteristics

Unknown

Bloom Size

Unknown

Bloom Time

Late Spring/Early Summer
Mid Summer
Late Summer/Early Fall

Other details

May be a noxious weed or invasive

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

Non-patented

Propagation Methods

From softwood cuttings
From seed; direct sow outdoors in fall
From seed; sow indoors before last frost
From seed; direct sow after last frost
Self-sows freely; deadhead if you do not want volunteer seedlings next season

Seed Collecting

Allow pods to dry on plant; break open to collect seeds
Properly cleaned, seed can be successfully stored