Site Characteristics

Sunlight:

• full sun
• part shade

Prefers part shade in areas with hot summers.

Soil conditions:

• requires damp soil

Prefers moist, alkaline soil. Spreads more rapidly in rich soils than in poorer soils.

Hardiness zones:

• 3 to 8

Plant Traits

Lifecycle: perennial

Ease-of-care: easy

Height: 0.5 to 2 feet

Spread: 1 to 3 feet

Bloom time:

• early summer
• mid-summer

Flower color:

• blue
• violet
• white

Foliage color:

• medium green
• dark green

Foliage texture: medium

Shape:

• spreading mass
• upright

Shape in flower: flower stalks with flowers as cups

Blooms borne in rounded clusters at the top of the stems.

Special Considerations

Special characteristics:

• aggressive - Spreads rapidly in moist soils, not aggressive in drier soils.
• non-invasive
• not native to North America - Native from Europe to Asia Minor, western, central and south Asia.

Growing Information

Varieties