Taxonomy

Division:

Magnoliophyta | - Flowering plants

Family:

Euphorbiaceae

Genus:

Euphorbia

Species:

Euphorbia rockii

USDA Symbol:

CHRO2

Growth Characteristics

Life Cycle:

Perennial

Growth Habit:

Shrub , Tree

Height:

60 cm

Light Requirements:

Full Sun

Drought Tolerance:

High

Bloom Months:

mar,apr,may,jun,jul,aug,sep,oct

Bloom Colors:

yellow, green

Keystone Species Ranking

Pollen Specialist Bee Keystone:

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

Garden & Ecology Notes

Wildlife Value:

birds

Deer Resistant:

Yes

Fire Ecology:

Fire adapted — tolerates or benefits from fire

Fire Notes:

Resprouts from rootstock following fire; typical of prairie and dry woodland Euphorbia species.

Soil Requirements

Soil Type:

well-drained, rocky or sandy soil

pH:

6.0 - 7.5 (slightly acidic to neutral)

Drainage:

excellent drainage required

Moisture:

dry to moderate

Notes:

native to rocky outcrops and dry slopes

Propagation & Germination

Stratification:

Cold/moist stratification required — 30–60 days

Germination Time:

14–60 days

Notes:

Seeds may germinate erratically; best results with fresh seed and cold stratification.

The above propagation data sourced from Claude AI