Taxonomy

Division:

Magnoliophyta | - Flowering plants

Family:

Fabaceae

Genus:

Lupinus

Species:

Lupinus truncatus

USDA Symbol:

LUTR2

Growth Characteristics

Life Cycle:

Annual

Growth Habit:

Forb/herb

Height:

60 cm

Light Requirements:

Full Sun

Drought Tolerance:

High

Bloom Months:

mar,apr,may,jun

Bloom Colors:

purple, blue, pink, white

Wildlife Benefits

Bees:

★☆☆☆☆ Documented bee visitation (GBIF)

Butterflies & Moths:

★☆☆☆☆ Documented Lepidoptera association (GBIF)

Keystone Species Ranking

Caterpillar Keystone:

★★★★☆ Butterfly & moth species supported by this genus (NWF)

Pollen Specialist Bee Keystone:

★★☆☆☆ Native pollen specialist bee species supported by this genus (NWF)

Garden & Ecology Notes

Wildlife Value:

bees, butterflies

Deer Resistant:

Yes

Fire Ecology:

Fire adapted — tolerates or benefits from fire

Fire Notes:

Resprouts from root crown following fire; typical of California chaparral and grassland lupines that respond positively to fire disturbance.

Soil Requirements

Soil Type:

sandy, well-drained, nutrient-poor soil

pH:

5.5 - 7.5 (slightly acidic to neutral)

Drainage:

excellent drainage required

Moisture:

dry to moderate

Notes:

Native to dry, open slopes and chaparral

Propagation & Germination

Stratification:

Cold/moist stratification required — 14–30 days

Scarification:

Seed coat scarification required before sowing

Germination Time:

14–60 days

Notes:

Scarification of hard seed coat improves germination. Seeds benefit from brief cold stratification or soaking in warm water.

The above propagation data sourced from Claude AI