Hemigraphis repanda

Species description

Care, breeding and tankmates

Plant profile

Placement

Midground

This plant is perfect for the foreground or midground of a terrarium, vivarium, or the land section of a paludarium. It stays relatively low and creeps along the ground, making it an excellent bordering plant or ground cover in humid environments. It should never be used in a fully aquatic setup.

Botanical form

Stem

Dragon's Tongue is recognized by its narrow, elongated, and deeply serrated leaves that resemble grass or miniature ribbons. The top of the leaves is a deep, dark greenish-black, while the underside features a striking burgundy or reddish-purple hue. It grows in a rosette-like clumping fashion with creeping stems.

Growth

Medium

In an emersed setup with high humidity and moderate to bright indirect light, it exhibits a moderate growth rate. It spreads outward rather than upward, slowly forming a textured mat of grassy leaves. Submerging the plant will completely halt its growth and inevitably lead to its death.

Substrate

Low

Hemigraphis repanda is a terrarium or paludarium species that performs poorly when fully submerged, requiring a moist but well-aerated terrestrial soil mix. It prefers a rich, loamy substrate with a depth of 5-8 cm to accommodate its spreading root structure. The soil should retain moisture to keep the roots hydrated but must offer excellent drainage to prevent root rot. Ensuring the roots have access to a nutrient-dense terrestrial medium will promote its distinctively narrow, dark-colored leaves.

Column fertilization

Recommended

Water column dosing does not apply to this species as it is not a true aquatic plant and will perish if grown underwater. If used in a riparium setup where only its roots are suspended in the aquarium water, it can extract dissolved nutrients, helping to purify the water, but the leaves must remain dry.

Root fertilization

None

It demands a high-quality, well-aerated terrestrial substrate that retains moisture without becoming soggy. Adding organic compost, worm castings, or terrarium-safe slow-release fertilizer will encourage vigorous growth and enhance its dark, dramatic colors. The soil should be kept damp, mimicking a tropical forest floor.

Trimming

Occasional

Minimal pruning is required for this slow-spreading plant. You may occasionally need to trim away older, yellowing, or damaged leaves at the base to maintain a tidy appearance. If the clumps become too dense over time, they can be divided to rejuvenate the plant's growth.

Propagation

Cuttings

Propagation is straightforward and is usually done by division. A mature clump can be gently pulled apart at the roots into smaller sections, each with its own root system and foliage. These smaller divisions can then be replanted in moist terrarium soil where they will establish quickly.

Sensitivity

Moderate

The primary cause of failure with this plant in the hobby is attempting to keep it submerged, which results in rapid rotting. It also requires constant high humidity; if the air is too dry, the delicate tips of the leaves will become crisp and brown. It prefers indirect light and can bleach if exposed to harsh, direct sunlight.

Layout role

Midground, paludarium, riparium, accent

In terrariums and paludariums, it serves as a fantastic, dark-colored ground cover that contrasts beautifully with lighter green mosses and broad-leaved tropical plants. Its grass-like texture adds variety to the landscape, creating miniature grassy knolls or defining the edges of water features in emergent setups.