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Veronicastrum sibiricum (Black Root Purple/Blue) Herb Plant


Some Herbs may be too tall for our standard packaging and will be trimmed to fit. This will not be detrimental to the plant but will mean that these herbs will flower later in the year.

The Blister packs used to protect our beautiful herbs during transit are made from 100% recycled plastic and can be recycled kerbside.

Black Root (Veronicastrum virginicum) Herb in 1L Pot

Veronicastrum Viginicum is commonly known as  Black root, Culver's Root and Bowman's root. An elegant hardy perennial which is native to North America it can grow up to a height of 2m with a spread of 45cm a welcome addition for the mid to back of the border with  it strong vertical flower spikes growing up to 1.2 M in height. It has finely toothed leaves with a purple/blue upright spike-like flower clusters, which appear from July. It prefers a sunny site in a well-drained soil. A perfect addition to naturalistic and prairie style planting. Veronicastrum can be kept as an increasingly skeletal form through autumn and winter, too and the Nectar-rich flowers will attract pollinators. 

Black Root prefers a position in moist, fertile soil, in sun or partial shade, they are best planted at the middle or to the back of a mixed herbaceous border because of their stature, the flowers add height to the back of a sunny or partially shady border. 

Herb Usage

Black Root is a plant known for its medicinal qualities in fact it's other common name Culver's root refers to an 18th Century American physician Dr. Culver who used the bitter, dried roots which were boiled to produce a powerful tonic, as a purgative and emetic.

WARNING: IT'S MEDICINAL USE CAN BE DANGEROUS ! - This plant should be grown purely for its flowers and should only be used medicinally by a medical professional.

Buy Black Root Online

Our potted Black Root herb plants are generally available to buy online between May and September.



Veronicastrum sibiricum (Black Root Purple/Blue) Herb Plant
Aspect/Site Full sun/Partial shade
Soil Type Moist well drained soil
Flower Colour Purple
Height 200cm
Spread 45cm
Latin Name Veronicastrum sibiricum
Hardiness RHS rating H7 - Very hardy
Culinary None
Scented None
Medicinal/Cosmetic Herbal medicine
Flowering/Harvest/Interest Summer
Special Features Pollinator Friendly
Type of Garden Wildlife
  • 5
    Veronicastrum sibiricum

    Posted by Allison Laird on 1st Sep 2021

    Large, leafy, with strong root system (not pot bound at all). Can hardly wait to see the flower show next year.