---
title: "Ox Knee"
id: "1985"
type: "herb"
slug: "ox-knee"
published_at: "2026-03-31T02:42:52+00:00"
modified_at: "2026-04-20T04:21:37+00:00"
url: "https://flowersandherbs.com/plants/ox-knee/"
markdown_url: "https://flowersandherbs.com/plants/ox-knee.md"
excerpt: "Ox knee is an Asian perennial herb traditionally used in Chinese herbal practice, where the root is the main medicinal part. It is associated with classic tonifying and movement-supporting formulas. Native to East Asia, ox knee prefers warm growing conditions..."
taxonomy_herb_type:
  - "Herb"
---

# Ox Knee Benefits & Uses (Achyranthes bidentata)

Ox knee (Achyranthes bidentata) is a perennial herb in the Amaranthaceae family, native to China, Japan, Korea, and nearby parts of Asia. It grows with upright stems and narrow flower spikes, while the root is the part most valued in traditional Chinese herbal practice.

Traditionally known as niu xi, ox knee is used in classic East Asian formulas associated with circulation, joints, and the lower body. It is generally prepared as a decocted root rather than as a casual household herb.

## Botanical Overview

- **Botanical name:***Achyranthes bidentata*
- **Family:** Amaranthaceae
- **Plant type:** Root herb
- **Native region:** China, Japan, Korea, and parts of Asia
- **Common names:** Ox knee, niu xi, Achyranthes root

**Plants often mentioned with Ox Knee**

**Ox Knee** is often discussed alongside [Dianthus](/plants/dianthus)
, [Clary Sage](/plants/clary-sage)
, and [Periwinkle](/plants/periwinkle)
 in educational herbal writing. These plants are linked through traditional systems that rely on careful identification, formal preparation, and professional guidance.

### Ox Knee Benefits and Traditional Uses

Ox Knee has traditionally been used to support:

- Traditional Chinese herbal formulas
- Lower body and joint support in classic use
- Movement and circulation support in traditional practice
- Root decoctions
- Combined formulas rather than single-herb household use

Ox knee has a long place in traditional Chinese materia medica and is usually discussed within the context of formal herbal formulas. “Niu xi has long been valued in traditional Chinese herbal practice as an important root herb of the lower body.”

#### Ox Knee Preparation Methods

Ox Knee can be prepared in several traditional ways:

**Decoction**

The dried root is commonly simmered in water for use in traditional Chinese herbal preparations.

**Part of the plant used:***Root*

**Tincture**

The root may be extracted in alcohol for concentrated herbal use.

**Part of the plant used:***Root*

**Dried Root Slices**

The root is often dried and sliced before inclusion in traditional formulas.

**Part of the plant used:***Root*

##### Growing Ox Knee

Ox knee is a warm-season perennial herb that prefers fertile soil and a sunny, protected position.

- Prefers full sun
- Grows best in rich, well-drained soil
- Water regularly during establishment
- Best suited to warm climates and a long growing season
- Generally suited to USDA zones 8–10, with care in cooler areas

In cooler parts of the United States it may need winter protection or container culture. A long, warm season supports better root development.

###### Safety Considerations

This herb has a long history of traditional use, however care should always be taken when using herbal plants.

However:

- Ox knee is traditionally considered a stronger root herb and is best used with qualified guidance.
- It has traditionally been avoided during pregnancy in some herbal systems.
- People using medications for blood pressure, circulation, or blood-thinning should seek professional advice.
- Correct identification and proper sourcing are important in root herbs used in formal traditions.
- This information is provided for educational purposes only and is not medical advice.

This information is provided for educational purposes only and is not medical advice.

**Image Disclaimer:** Images are for reference only and should not be used as the sole method of identification. Always confirm identification with a qualified source.

Frequently Asked Questions

What is ox knee traditionally used for?

Ox knee, or Achyranthes bidentata, is traditionally used in Chinese herbal practice in formulas associated with movement, circulation, and lower-body support. It is generally used as part of structured formulas.

What part of ox knee is used?

The root is the main part used in traditional herbal preparations. It is usually dried, sliced, and decocted.

What is the Chinese name for ox knee?

Ox knee is commonly known as niu xi in traditional Chinese herbal practice.

Can ox knee grow in the United States?

It can be grown in warmer parts of the United States, especially where the season is long and soil is rich and well drained. In cooler climates it may need extra protection.

How is ox knee prepared traditionally?

Ox knee is usually prepared as a decoction made from the dried root. It is commonly combined with other herbs in classical formulas.

Are there safety concerns with ox knee?

Yes. It is considered a stronger root herb and is best used with qualified guidance. Traditional sources often advise caution or avoidance during pregnancy.