How to Grow and Care for Dischidia Nummularia

Dischidia nummularia, or “String of Nickels,” is known for its long, trailing stems adorned with small, round, coin-like leaves. The leaves are thick and fleshy, which allows the plant to store water. Native to tropical Asia and Australia, it grows as an epiphyte on tree trunks in rainforests. This growth habit means it clings to other plants, absorbing moisture and nutrients from the air and its surroundings.

Essential Care Guide

Light

Dischidia nummularia requires bright, indirect light. An east or north-facing window provides sufficient brightness without the harshness of direct sun, which can scorch the leaves. In lower light conditions, its growth may become sparse or “leggy” as it stretches toward a light source. If natural light is unavailable, a grow light can provide the necessary illumination for healthy development.

Water

This plant is sensitive to overwatering and root rot. Use the “soak and dry” method, allowing the growing medium to dry out completely between waterings. When you water, moisten the medium thoroughly until water drains from the pot. Reduce the frequency of watering during the fall and winter when the plant’s growth slows.

Soil

A chunky, airy, and fast-draining mix is required, similar to what is used for orchids. Standard potting soil is not appropriate because it retains too much moisture. Create a suitable blend using components like orchid bark, coconut husks, perlite, and a small amount of peat moss or coco coir. This composition ensures the roots receive proper air circulation.

Temperature and Humidity

String of Nickels thrives in temperatures between 60°F and 80°F (16°C to 27°C). Protect it from drafts and temperatures below 50°F (10°C). The plant prefers a humid environment, so placing it in a kitchen or bathroom is beneficial. You can also increase ambient moisture with a humidifier or by placing the pot on a pebble tray filled with water.

Fertilizer

This plant is a light feeder. During the spring and summer growing season, apply a balanced liquid fertilizer diluted to half-strength once a month. Diluting the fertilizer prevents mineral salt buildup that can damage the roots. Cease fertilizing in the fall and winter when the plant is resting.

Potting and Mounting Options

Displaying Dischidia nummularia in a hanging basket allows its long stems to cascade. When potting, select a container with ample drainage holes to prevent water from accumulating. This method showcases the plant’s natural vining tendency.

To imitate its natural epiphytic lifestyle, the plant can be mounted on cork bark or wood. Place a small amount of sphagnum moss around the root ball to retain moisture. Secure the plant to the mount with fishing line or flexible wire until its roots take hold. This technique creates a display that highlights the plant’s growth habit.

This species prefers to be slightly root-bound and does not need frequent repotting. Repot every two to three years, or when roots grow out of the drainage holes. Select a new container that is only slightly larger than the previous one. This prevents the roots from being in an excessive amount of soil, which can hold too much moisture.

How to Propagate

Propagating a String of Nickels is done with stem cuttings. Using clean scissors, take a cutting a few inches long with at least three or four nodes. Remove the leaves from the lower half of the cutting to expose these nodes, which is where new roots will form.

Once the cutting is prepared, you can root it in a substrate or in water. To root in a substrate, place the cut end in a pot with moist sphagnum moss or the plant’s usual potting mix, burying at least two nodes. Alternatively, place the cutting in a container of water, ensuring the nodes are submerged. New roots should appear within a few weeks.

To support rooting, create a humid environment by covering the pot with a clear plastic bag. Place the cutting in bright, indirect light and keep the substrate moist but not waterlogged. After several weeks, check for root growth by gently tugging the cutting; resistance indicates that roots have formed.

Troubleshooting Common Issues

Yellow, mushy leaves are a common sign of overwatering, indicating the roots are sitting in soil that is too wet. Reduce your watering frequency and ensure the pot has adequate drainage.

If the leaves appear wrinkled or shriveled, the plant is underwatered. This appearance shows that its water reserves are depleted. A thorough watering should help the leaves plump back up within a day.

Dischidia nummularia is susceptible to pests like mealybugs and scale insects, which appear as cottony white spots or brown bumps. These pests feed on the plant’s sap and can be managed by dabbing them with a cotton swab dipped in rubbing alcohol. Inspect your plant regularly to catch infestations early.