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Hardiness: USDA Zone 4a: to -34.4 °C (-30 °F) USDA Zone 4b: to -31.6 °C (-25 °F) USDA Zone 5a: to -28.8 °C (-20 °F) USDA Zone 5b: to -26.1 °C (-15 °F) USDA Zone 6a: to -23.3 °C (-10 °F) USDA Zone 6b: to -20.5 °C (-5 °F) USDA Zone 7a: to -17.7 °C (0 °F) USDA Zone 7b: to -14.9 °C (5 °F) USDA Zone 8a: to -12.2 °C (10 °F) USDA Zone 8b: to -9.4 °C (15 °F)
Other details: May be a noxious weed or invasive Average Water Needs; Water regularly; do not overwater
Soil pH requirements: 5.1 to 5.5 (strongly acidic) 5.6 to 6.0 (acidic) 6.1 to 6.5 (mildly acidic) 6.6 to 7.5 (neutral)
Propagation Methods: From softwood cuttings From seed; direct sow outdoors in fall From seed; winter sow in vented containers, coldframe or unheated greenhouse From seed; sow indoors before last frost
On Jul 27, 2003, PurplePansies from Deal, NJ (Zone 7a) wrote:
This plant grows wild where I am, (the Mid-Atlantic). It's not a really showy plant, not suited for a perennial or flower garden. Although it may be at home in a wild, wild-flower or medicinal/herb garden. It is pretty invasive, so don't plant near shyer plants. Can grow in dryer soil but prefers moister, grows very well in even wet soil, (it often grows here on riversides and beside lakes). Grows in sun to partial sun, partial shade. Said to be useful in treating depression, but I have no idea how to prepare the plant for this use.