Taxonomy

Division:

Magnoliophyta | - Flowering plants

Family:

Ulmaceae

Genus:

Ulmus

Species:

Ulmus thomasii

USDA Symbol:

ULTH

Growth Characteristics

Life Cycle:

Perennial

Growth Habit:

Tree

Height:

3000 cm

Light Requirements:

Full Sun,Part Shade,Shade

Drought Tolerance:

Medium

Bloom Months:

mar,apr

Bloom Colors:

green, red

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

Garden & Ecology Notes

Wildlife Value:

birds, small mammals

Fall Color:

yellow

Soil Requirements

Soil Type:

rich, well-drained loamy soil

pH:

6.0 - 8.0 (slightly acidic to neutral)

Drainage:

tolerates moderate drainage

Moisture:

dry to moderate

Notes:

Prefers calcareous soils; often found on limestone outcrops

Propagation & Germination

Stratification:

Cold/moist stratification required — 60–90 days

Germination Time:

14–30 days

Notes:

Seeds require cold stratification for 60-90 days to break dormancy.