Metastelma Species, Bearded Swallow-Wort, Thicket Threadvine

Metastelmabarbigerum

Family
Apocynaceae (a-pos-ih-NAY-see-ee)
Species
barbigerum (bar-BEE-ger-um)
Synonym
Cynanchum barbigerum
Sun Exposure
Sun to Partial Shade
Foliage
Smooth
Height
36-48 in. (90-120 cm)
4-6 ft. (1.2-1.8 m)
Spacing
15-18 in. (38-45 cm)
Hardiness
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)
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)
Bloom Color
White/Near White
Cream/Tan
Bloom Time
Mid Spring
Late Spring/Early Summer
Mid Summer
Late Summer/Early Fall
Other Details
Category
Perennials
Vines and Climbers
Water Requirements
Drought-tolerant; suitable for xeriscaping
Foliage Color
Where to Grow
Bloom Characteristics
This plant is attractive to bees, butterflies and/or birds
Flowers are fragrant
Bloom Size
Other details
Soil pH requirements
6.1 to 6.5 (mildly acidic)
6.6 to 7.5 (neutral)
7.6 to 7.8 (mildly alkaline)
7.9 to 8.5 (alkaline)
Patent Information
Propagation Methods
From seed; direct sow outdoors in fall
From seed; direct sow after last frost
Self-sows freely; deadhead if you do not want volunteer seedlings next season
Seed Collecting
Bag seedheads to capture ripening seed
Allow seedheads to dry on plants; remove and collect seeds
Regional

This plant is said to grow outdoors in the following regions:

Austin, Texas

San Antonio, Texas

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Gardener's Notes:

0
positive
1
neutral
0
negative
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San Antonio, TX (Zone 8b) | November 2006 | neutral

I have not grown this plant; but, I have seen it growing in its native habitat. IIt is also commonly called thicket threadvine. An endem...Read More

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