Taxonomy

Division:

Magnoliophyta | - Flowering plants

Family:

Rosaceae

Genus:

Spiraea

Species:

Spiraea wilsonii

USDA Symbol:

SPWI2

Growth Characteristics

Height:

150 cm

Light Requirements:

Full Sun

Drought Tolerance:

Medium

Bloom Months:

may,jun,jul

Bloom Colors:

white, pink

Landscaping Shrub:

Yes

Keystone Species Ranking

Caterpillar Keystone:

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

Garden & Ecology Notes

Wildlife Value:

butterflies, bees

Fall Color:

red, orange

Soil Requirements

Soil Type:

rich, well-drained loamy soil

pH:

5.5 - 7.0 (slightly acidic to neutral)

Drainage:

excellent drainage required

Moisture:

consistently moist

Notes:

native to moist, open areas in mountainous regions

Propagation & Germination

Stratification:

Cold/moist stratification required — 30–60 days

Germination Time:

30–90 days

Notes:

Seeds benefit from cold stratification for 30-60 days to break dormancy.