Prairie Buttercup, Labrador Buttercup, Plains Buttercup
Ranunculusrhomboideus

Family: Ranunculaceae (ra-nun-kew-LAY-see-ee)
Genus: Ranunculus (ra-NUN-ku-lus)
Species: rhomboideus (rom-BOY-dee-us)

Category
Perennials

Water Requirements
Requires consistently moist soil; do not let dry out between waterings

Sun Exposure
Full Sun
Sun to Partial Shade

Foliage
Herbaceous

Foliage Color

Height
6-12 in. (15-30 cm)

Spacing
6-9 in. (15-22 cm)

Hardiness
USDA Zone 3a: to -39.9 °C (-40 °F)
USDA Zone 3b: to -37.2 °C (-35 °F)
USDA Zone 4a: to -34.4 °C (-30 °F)
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)

Where to Grow

Danger
Parts of plant are poisonous if ingested
Handling plant may cause skin irritation or allergic reaction

Bloom Color
Bright Yellow

Bloom Characteristics
This plant is attractive to bees, butterflies and/or birds

Bloom Size

Bloom Time
Late Winter/Early Spring
Mid Spring

Other details

Soil pH requirements
6.6 to 7.5 (neutral)
7.6 to 7.8 (mildly alkaline)

Patent Information

Propagation Methods
From seed; direct sow outdoors in fall
From seed; winter sow in vented containers, coldframe or unheated greenhouse
From seed; stratify if sowing indoors
Direct sow as soon as the ground can be worked
From seed; sow indoors before last frost

Seed Collecting
Properly cleaned, seed can be successfully stored