Ophiopogon Japonicus Green

Quick facts

Identity

Also known as

Dwarf Lilyturf; Japanese Nettle; Monkey Grass

Synonyms

Convallaria japonica

Environment

Terrestrial

Native to

Japan, China, Korea

Habitat

Moist, well-drained soils in shady forests, woodland edges, and among rocks in temperate to subtropical East Asia

Sourcing

Aquacultured

Conservation

Not Evaluated

Care

Care level

Easy

Growth form

Rhizome

Max height

4 – 8 in (10 – 20 cm)

Spread

12 in (30 cm)

Growth rate

Slow

Placement

Foreground, Midground

Water

Temperature

61 – 82 °F (16 – 28 °C)

Humidity

60 – 90%

Planting

Substrate

Nutrient-rich preferred

Feeds from

Roots

Fertilizer needs

Low

Colors

Green

Feeding & breeding

Propagation

Rhizome division

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Care guide

Overview

Long cultivated in Japan, China, and Korea as a woodland edge and rock garden ground cover, this clone forms dense tufts of narrow, dark green blades over slowly creeping rhizomes. Suited only to terrarium or paludarium foreground planting above the waterline, it needs humid, shaded conditions and consistently moist, well-draining soil rather than submersion.

Care

Mondo grass is a hardy, clumping terrestrial plant often mislabeled for aquarium use, though it is only suitable for emersed cultivation in terrariums, paludariums, and bog setups. It prefers filtered light to partial shade, humus-rich and well-draining soil kept consistently moist, and moderate to high humidity. Given time it forms a dense, lawn-like carpet of narrow dark green blades and tolerates a wide range of temperatures, making it forgiving for beginners in humid vivarium setups.

Planting & trimming

Plant divided clumps directly into moist, humus-rich, well-draining soil with the crown at soil level, keeping roots damp but never submerged. It works well as a foreground or midground ground cover in terrariums and paludariums, and can tolerate brief periods of splashing or high humidity but declines with continuous submersion. Shear back old or shaggy foliage in early spring before new growth resumes to keep clumps tidy.

Fertilizing

Mondo grass does not need heavy fertilizing and grows well in ordinary nutrient-rich terrarium soil with minimal supplementation. Occasional diluted liquid fertilizer or a light top-dressing of organic compost can support steadier growth, but overfeeding is rarely necessary. Yellowing or pale foliage usually points to insufficient light or waterlogged, poorly draining substrate rather than a nutrient deficiency.

Propagation

Propagation is by dividing established clumps, separating sections of rhizome with attached roots and at least several leaves per division. Divided sections can be replanted directly into moist soil where they will re-establish and slowly spread to form a continuous mat. This is a slow-growing species, so noticeable clump expansion takes patience over multiple growing seasons.

Problems

The main risk is rot from prolonged waterlogging or full submersion, since this species is terrestrial and not built for sustained underwater life despite being sold for aquascaping. Poor drainage or stagnant humid conditions can also encourage fungal issues at the base of the clump. Trimming ragged or browning leaf tips in early spring keeps the foliage looking presentable through the year.

Sources

1. Ophiopogon japonicus: Complete Care, Characteristics, and Uses Guide
2. Ophiopogon japonicus Aquatic Plant Care | Atlarium
3. Mondo Grass | Home & Garden Information Center
4. Mondo Grass (Ophiogon Japonica) | Live Terrarium Plant – Canton Aquatics