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)
On Aug 10, 2008, dianne99 from Brookville, KS (Zone 5b) wrote:
I have this wild all over my property, but have not been here for a dry year yet so cannot speak for it's performance then, and it has put on an impressive display all season, even in a recently graded area of deep clay-y sand along with false sunflowers and 2 other varieties of yellow flowers I cannot ID...nature designed this planting and it is stunning. I also use it in wildflower bouquets (harvesting very lightly) and it lasts over a week with the parts of the flower that open inside the house a lovely lighter shade of lavender for a lovely two-toned miniature bottle-brush effect.
Once DH and I were walking along a trail high above a low-lying wetland that was awash in vivid, dark lavender-purple, and for a moment, it was as if I was inside a picture of a field of lavender in Provence, France in one of my gardening books. Such is the effect of a wide plain filled with blue vervain from a distance - beautiful and awesome. Up close, there must have been a couple dozen kinds of other plants down there with it, but all has now been trounced by the very invasive Polygonum cuspidatum (Japanese knotweed).
On Aug 10, 2005, melody from Benton, KY (Zone 7a) wrote:
Blooming in late summer/early fall here in west KY, Blue Vervain graces the roadsides and damp meadows with a long blooming period. The tall spikes have the appearance of a candleabra with tiny blue 'flames.
In ancient times, it was thought to cure all sorts of ailments and was highly regarded as 'big medicine'.
Found pretty much throughout the eastern half of the country, it seems to survive in a great variety of conditions, but prefers damp thickets, shorelines and roadsides.
On Nov 2, 2001, poppysue from Westbrook, ME (Zone 5a) wrote:
This verbena grows into a large clump 4-5 feet tall. It has stiff erect stems, lance shapes foliage and a spiky candelabrum of flowers. The flowers may not be as large as the garden varieties of verbena but they are abundant and bloom for a very long time during the summer months. The tiny tubular shaped blossoms grow in whorls up the pencil shaped spikes and are a treat for bees and butterflies.
This is a medicinal species of verbena and has been used for centuries for it’s mild sedative affects as well as “female” ailments, stomach cramps, colds, fevers and other diseases. Its genus name is Latin for “sacred plant”. Early settlers believed it would ward off evil spirits. It’s a wonderful native to add to the garden.
This plant loves wet soils and can reach a height of 5 ft or taller if grown in a damp area. It will tolerate many other conditions but may remain smaller. Mine stays at 3 ft. grown in a heavy clay soil. Seeds will benefit from a fall sowing because a cold period improves the germination.
This plant has been said to grow in the following regions:
, Menlo Park, California Cordele, Georgia Chicago, Illinois Rockford, Illinois Flora, Indiana Galena, Indiana Wabash, Indiana Brookville, Kansas Benton, Kentucky Louisville, Kentucky Taylorsville, Kentucky Ellicott City, Maryland Pinconning, Michigan Minneapolis, Minnesota Woodland, Minnesota Cole Camp, Missouri O'fallon, Missouri Dover, New Hampshire Bayville, New Jersey Newfield, New York Browns Summit, North Carolina Bowling Green, Ohio Loveland, Ohio Ashland City, Tennessee Kalama, Washington Falling Waters, West Virginia Pewaukee, Wisconsin Porterfield, Wisconsin