Tradescantia virginiana, Virginia Spiderwort

Virginia spiderwort
Tradescantia virginiana

Hardiness: Zones 4 to 9
Plant type: Herbaceous perennial
Height: 1.5- 3'
Spread: 1-1.5'
Sun: Part shade to full sun
Water: Medium to wet
Bloom time: September, October
Bloom color: Purplish blue
Soil: Loamy, average well-draining soils, sandy, well-draining soils, neutral (≈7), alkaline (>7pH), acid (<7pH).

Notes: When the stems of spiderworts are cut, a viscous stem secretion is released which becomes threadlike and silky upon hardening (like a spider's web), hence the common name.

More information on this plant here.