Euphorbia Species, River Euphorbia
Euphorbiatriangularis

Family: Euphorbiaceae (yoo-for-bee-AY-see-ee)
Genus: Euphorbia (yoo-FOR-bee-uh)
Species: triangularis (try-an-gew-LAIR-iss)

Synonym:Euphorbia evansii

Category
Cactus and Succulents

Water Requirements
Drought-tolerant; suitable for xeriscaping

Sun Exposure
Sun to Partial Shade
Light Shade

Foliage
Deciduous


Foliage Color

Height
20-30 ft. (6-9 m)
30-40 ft. (9-12 m)
over 40 ft. (12 m)

Spacing
15-20 ft. (4.7-6 m)

Hardiness
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)
USDA Zone 11: above 4.5 °C (40 °F)

Where to Grow
Can be grown as an annual

Danger
Parts of plant are poisonous if ingested
Plant has spines or sharp edges; use extreme caution when handling

Bloom Color
Bright Yellow

Bloom Characteristics

Bloom Size

Bloom Time
Late Summer/Early Fall

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)

Patent Information
Non-patented

Propagation Methods
From herbaceous stem cuttings
From woody stem cuttings
From seed; germinate in vitro in gelatin, agar or other medium

Seed Collecting