Gregg's Ash

Fraxinus greggii

Native to:
Mexico, United States

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Taxonomy

Division:
Magnoliophyta | - Flowering plants
Family:
Oleaceae
Genus:
Fraxinus
Species:
Fraxinus greggii
USDA Symbol:
FRGR2

Growth Characteristics

Life Cycle:
Perennial
Growth Habit:
Shrub , Tree
Height:
600 cm
Light Requirements:
Part Shade
Drought Tolerance:
High
Bloom Months:
mar,apr,may
Bloom Colors:
white, cream
Landscaping Shrub:
Yes

Wildlife Benefits

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

Keystone Species Ranking

Caterpillar Keystone:
★★★★★ Butterfly & moth species supported by this genus (NWF)

Host Plant for Caterpillars

Incense Cedar Sphinx (Sphinx libocedrus), Olceclostera seraphica

Garden & Ecology Notes

Wildlife Value:
birds, butterflies
Deer Resistant:
Yes
Fragrant:
Yes
Fire Ecology:
Fire adapted — tolerates or benefits from fire
Fire Notes:
Resprouts from the root crown following fire or mechanical damage.

Soil Requirements

Soil Type:
rocky, well-drained calcareous soil
pH:
7.0 - 8.5 (neutral to slightly alkaline)
Drainage:
excellent drainage required
Moisture:
dry to moderate
Notes:
native to arid regions, tolerates drought

Propagation & Germination

Stratification:
Cold/moist stratification required — 30–60 days
Germination Time:
14–42 days
Notes:
Seeds benefit from cold stratification; germination can be erratic without pretreatment.

The above propagation data sourced from Claude AI