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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) USDA Zone 10a: to -1.1 °C (30 °F) USDA Zone 10b: to 1.7 °C (35 °F) USDA Zone 11: above 4.5 °C (40 °F)
Sun Exposure: Full Sun
Danger: Handling plant may cause skin irritation or allergic reaction
Bloom Color: Magenta (Pink-Purple) Medium Blue Blue-Violet
Bloom Time: Late Spring/Early Summer Mid Summer Late Summer/Early Fall
Foliage: Herbaceous
Other details: May be a noxious weed or invasive This plant is attractive to bees, butterflies and/or birds Average Water Needs; Water regularly; do not overwater Self-sows freely; deadhead if you do not want volunteer seedlings next season This plant is resistant to deer
On Feb 6, 2005, Keystone from Silverton, ID wrote:
Very invasive, pushing out natives Prefers gravelly, sandy soils along riparian areas which aids its spread. Extensive seed bank. It is on several county weed lists and being added to Idaho State weed list. Gerninates spring to fall making control laborous.
On Jul 13, 2004, CatskillKarma from West Kill, NY wrote:
This stuff grows wild all over my yard in the Catskills. It is a gorgeous blue and very vigorous, although it is somewhat prickly. Be careful handling it--it can leave little spines in your skin and cause a rash. It is invasive, and I don't put in my garden beds,but I leave it wherever it pops up and it provides a welcome splash of brilliant color.
On Jul 12, 2004, jhyshark from Scottville, MI (Zone 4b) wrote:
I just love this plant! It grows as a weed in my lawn, but I moved some to the flower beds. It is a biennial, so must move the new rosettes to where I would like the plant to grow, but it is so tolerant of abuse that most of these survive even if I break the taproot. Can't beat the true blue of the flowers, and the buds are pink, which yield to the blue when open. Given my poor, dry soil, it's one of my most reliable bloomers. Get's ugly when it's gone to seed, but I just trim it back. Enough seeds always escape to create the next batch of babies.
On Aug 4, 2001, Terry from Murfreesboro, TN (Zone 7a) wrote:
Viper's Bugloss is a showy biennial of Eurasian origin, imported to the U.S., where it has naturalized in pastures and roadways.
The plant is covered with prickly hairs. It grows on walls, old quarries and gravel pits, and is common on calcareous soils.
The name Bugloss, which is of Greek origin, signifies an Ox's Tongue, and was applied to it from the roughness and shape of the leaves.
It is a favorite of bees and hummingbird moths.
Regional...
This plant has been said to grow in the following regions:
Flagstaff, Arizona Merced, California Grand Rapids, Michigan Scottville, Michigan Brainerd, Minnesota Deposit, New York West Kill, New York Harrisburg, Pennsylvania Kalama, Washington
One vendor has this plant for sale.
