Lathyrus Species, Flat Pea, Flat Peavine, Narrow-leaved Everlasting Pea
Lathyrussylvestris

Synonym:Lathyrus heterophyllus

Synonym:Lathyrus platyphyllus

Synonym:Lathyrus silvestris

Category
Perennials
Vines and Climbers

Water Requirements

Sun Exposure
Sun to Partial Shade

Foliage
Herbaceous
Smooth

Foliage Color

Height
6-8 ft. (1.8-2.4 m)

Spacing
36-48 in. (90-120 cm)

Hardiness
USDA Zone 4b: to -31.6 °C (-25 °F)
USDA Zone 5a: to -28.8 °C (-20 °F)
USDA Zone 5b: to -26.1 °C (-15 °F)
USDA Zone 6a: to -23.3 °C (-10 °F)
USDA Zone 6b: to -20.5 °C (-5 °F)
USDA Zone 7a: to -17.7 °C (0 °F)
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)

Where to Grow

Danger
Seed is poisonous if ingested
All parts of plant are poisonous if ingested

Bloom Color
Pink

Bloom Characteristics
Flowers are fragrant

Bloom Size

Bloom Time
Mid Summer

Other details
May be a noxious weed or invasive

Soil pH requirements
5.6 to 6.0 (acidic)
6.1 to 6.5 (mildly acidic)
6.6 to 7.5 (neutral)

Patent Information
Non-patented

Propagation Methods
By dividing the rootball
From seed; direct sow outdoors in fall
From seed; winter sow in vented containers, coldframe or unheated greenhouse
From seed; stratify if sowing indoors
From seed; sow indoors before last frost

Seed Collecting
Allow pods to dry on plant; break open to collect seeds