Caudex Stephaina Japonica

The Japanese Caudex Vine

What Is Stephania japonica?

Stephania japonica is a tropical caudex plant known for its round, coin-shaped leaves and swollen base (caudex). It is native to parts of Asia and grows as a climbing vine in warm environments.

The caudex acts as a water storage organ, helping the plant survive dry periods. This plant is not aquatic and should never be submerged.

It is popular among collectors for its unique bonsai-like appearance, with thin climbing stems rising from a thick, exposed base.

Minimal and sculptural, Stephania japonica is ideal for growers who enjoy artistic caudex plants.

How It Grows

This plant grows from a round caudex (swollen base). Thin vines emerge from the top and climb or trail.

Growth is moderate during its active season and may slow or go dormant in cooler periods.

The Leaves

The leaves are simple and round.

• Color: light to medium green

• Surface: smooth with soft matte finish

• Shape: round, coin-like with central stem attachment

The circular leaf shape is its main highlight.

Light Needs

Prefers bright, indirect light.

• Avoid strong direct sunlight

• Good light supports compact growth

Low light may cause leggy stems.

Water & Growing Conditions

• Allow soil to dry partially between watering

• Use very well-draining soil mix (cactus or gritty mix)

• Prefers moderate humidity

• Ideal temperature: 20–30°C

Reduce watering during dormancy.

Growing Environment

Best suited for:

• Indoor plant displays

• Bright windowsills

• Minimalist or bonsai-style setups

Not suitable for aquariums or submerged environments.

Care Level

Low to medium care.

• Suitable for beginners

• Drought-tolerant due to caudex

• Seasonal growth pattern

Handling Note

Keep the caudex partially exposed above the soil for aesthetic and health reasons. With proper care, Stephania japonica will produce elegant vines with round, decorative leaves.