Giant Coreopsis

Leptosyne gigantea

Native to:
Mexico, United States

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Taxonomy

Division:
Magnoliophyta | - Flowering plants
Family:
Asteraceae
Genus:
Leptosyne
Species:
Leptosyne gigantea
USDA Symbol:
COGI

Growth Characteristics

Life Cycle:
Perennial
Growth Habit:
Forb/herb , Shrub , Subshrub
Height:
300 cm
Light Requirements:
Full Sun
Drought Tolerance:
High
Bloom Months:
mar,apr,may,jun
Bloom Colors:
yellow
Landscaping Shrub:
Yes

Wildlife Benefits

Bees:
★☆☆☆☆ Documented bee visitation (GBIF)
Butterflies & Moths:
★☆☆☆☆ Documented Lepidoptera association (GBIF)
Caterpillars:
★☆☆☆☆ Recorded caterpillar host plant (HOSTS Database)

Host Plant for Caterpillars

orange tortrix moth (Argyrotaenia franciscana)

Garden & Ecology Notes

Wildlife Value:
bees, butterflies, birds
Deer Resistant:
Yes
Salt Tolerant:
Yes
Fire Ecology:
Fire adapted — tolerates or benefits from fire
Fire Notes:
Resprouts from woody base after fire; adapted to coastal sage scrub fire regimes.

Soil Requirements

Soil Type:
sandy, well-drained, nutrient-poor soil
pH:
6.0 - 7.5 (slightly acidic to neutral)
Drainage:
excellent drainage required
Moisture:
dry to moderate
Notes:
native to coastal sage scrub areas

Propagation & Germination

Stratification:
None required
Germination Time:
14–28 days
Notes:
Seeds germinate readily without pretreatment; best sown in fall for natural winter moisture.

The above propagation data sourced from Claude AI

Pre-treatment: Single-step cold-moist stratification for temperate woodland species. for 60–120 days

Source: Claude AI