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Hardiness: USDA Zone 3a: to -39.9 °C (-40 °F) USDA Zone 3b: to -37.2 °C (-35 °F) 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) USDA Zone 9a: to -6.6 °C (20 °F) USDA Zone 9b: to -3.8 °C (25 °F)
Sun Exposure: Full Sun Sun to Partial Shade
Danger: N/A
Bloom Color: Magenta (Pink-Purple)
Bloom Time: Late Spring/Early Summer Mid Summer Late Summer/Early Fall
Foliage: Herbaceous
Other details: May be a noxious weed or invasive Requires consistently moist soil; do not let dry out between waterings
Soil pH requirements: 4.6 to 5.0 (highly acidic) 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) 7.6 to 7.8 (mildly alkaline) 7.9 to 8.5 (alkaline) 8.6 to 9.0 (strongly alkaline)
This Purple Loosestrife is illegal to grow in most states. I work on trying to get rid of this plant in the wild and prevent people from growing it. Every late July and August the plants starts to lay seeds, it can produce any where between 1 million to just over 2.6 million seeds a year. It may a be a pretty plant but it is INVASIVE!! It is very degrading to shorelines where fish spawn.
On Aug 28, 2003, GAGARD from Decatur, GA (Zone 7b) wrote:
I believe the research shows that 'Morden's Pink" was pollinated by the wild loosestrife, not the other way around. If no wild loosestrife is present, why not enjoy this beautiful cultivar?
On Jun 16, 2003, RubyStar from Madison, WI (Zone 5a) wrote:
Lythrum salicaria, L. virgatum, and all of their hybrids are responsible for a devastating amount of damage to North American wetlands. As stated above, even self-fertile hybrids can contribute hugely to the problem, by pollinating wild-growing stands.
Purple Loosestrife is regulated in most areas of North American, and banned in many areas.
One member has or wants this plant for trade.
