Culver’s root

Veronicastrum virginicum

Culver’s root is best known as an ornamental plant, much loved for its stunning spikes of white flowers. Less known and less seen are its bitter roots which have a long history of use in Native American herbal traditions.

Native to Eastern and Central regions of the United States, culver’s root was reportedly used by indigenous people to treat a range of ailments, including as a diaphoretic (to induce sweating), emetic (to induce vomiting), laxative, and as a remedy for fevers, dysentery, constipation, and liver complaints. It was later adopted by European settlers and eventually found its way into Western herbal practice, primarily as a bitter herb to support digestion and cleanse the liver.

It is a favourite of ours at Earthsong Seeds; its distinctive flower spikes provide a unique and contrasting aesthetic to the more typically rounded plants of the herb garden. It is a perennial that grows to around 1.5m in height when it is in full bloom in mid to late summer. Generally speaking it prefers full sunshine and well-drained soil, but we grow it in a variety of locations and soil types and have found it to be very adaptable.

£2.50
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Sowing and Growing

Firstly, it’s worth mentioning that culvers root seed is tiny. One gram contains approximately 26,000 seeds, so you may find that your pack of 500 seeds doesn’t look like much, but it should be enough to grow a sizeable field of plants!

Our experiments have shown that cold-moist stratification for a few weeks does improve germination time and rate, but is not essential. You should still get a decent germination rate from unstratified seed. We recommend sowing indoors in early Spring. You can also sow directly outdoors in Autumn, but your germination rate and survival is likely to be lower so only do that if you have a larger quantity of seed.

As with all tiny seeds, carefully scatter on the surface of the soil or compost and gently press in without covering. Germination usually takes around 2-3 weeks, so be patient and ensure the trays don’t dry out. Transplant or thin with a spacing of 30-50cm.

If you have a very dry summer it may require regular watering to keep the plant and its tall flowering spikes in optimal health.

Uses and Benefits

Being a relatively strong bitter, Culver’s root is used in low amounts to cleanse and clear. It treats digestive imbalances by supporting the flow of bile from the liver, clearing constipation and helping skin conditions. Its potency is mitigated by drying and storing for one year, as fresh roots can cause double-ended purgation. Its best combined with other carminative herbs such as fennel or licorice mint.

Harvesting and Preparation

For a sustainable harvest of roots, it is advisable to wait until the plant’s second or third year.

Wash, slice and dry the roots and store in an airtight container for a year before use.

It is used as decoction or tincture at 3g per day.

 

 

Species Info
Soil
RHS Pollinators

No

Best for Bees

No

Recommended for Beginners

No

Stratification Needed?

Cold-moist stratification helps but not essential

Herbal Tradition

Native American

General Uses

Medicinal

Can be sown direct?

Yes

Herbal Uses

Digestion, Liver, Skin

Flower Colour(s)

White

Hardiness

H7 (very hardy)

UK Native

No

Flowering

June, July, August

Life Cycle

Perennial

Sunlight
Recommended Sowing Times
Herbal Teas

Decoctions

Make Your Own

Cream, Poultice & Plasters, Tincture

Description

Culver’s root is best known as an ornamental plant, much loved for its stunning spikes of white flowers. Less known and less seen are its bitter roots which have a long history of use in Native American herbal traditions.

Native to Eastern and Central regions of the United States, culver’s root was reportedly used by indigenous people to treat a range of ailments, including as a diaphoretic (to induce sweating), emetic (to induce vomiting), laxative, and as a remedy for fevers, dysentery, constipation, and liver complaints. It was later adopted by European settlers and eventually found its way into Western herbal practice, primarily as a bitter herb to support digestion and cleanse the liver.

It is a favourite of ours at Earthsong Seeds; its distinctive flower spikes provide a unique and contrasting aesthetic to the more typically rounded plants of the herb garden. It is a perennial that grows to around 1.5m in height when it is in full bloom in mid to late summer. Generally speaking it prefers full sunshine and well-drained soil, but we grow it in a variety of locations and soil types and have found it to be very adaptable.

Additional information

Soil
RHS Pollinators

No

Best for Bees

No

Recommended for Beginners

No

Stratification Needed?

Cold-moist stratification helps but not essential

Herbal Tradition

Native American

General Uses

Medicinal

Can be sown direct?

Yes

Herbal Uses

Digestion, Liver, Skin

Flower Colour(s)

White

Hardiness

H7 (very hardy)

UK Native

No

Flowering

June, July, August

Life Cycle

Perennial

Sunlight
Recommended Sowing Times
Herbal Teas

Decoctions

Make Your Own

Cream, Poultice & Plasters, Tincture