Propagating Nymphoides aquatica: Daughter Plants and Banana Tubers

The banana plant propagates by daughter plants on runners and leaf-base plantlets, fueled by banana-shaped storage tubers. Learn to separate and replant them correctly.

Overview

Nymphoides aquatica, the banana plant or banana lily, is native to the southeastern United States from Texas to Maryland and is especially common in Florida. It is named for its cluster of banana-shaped tubers at the base, where the plant stores nutrients. Once established it produces both wavy green submersed leaves and tall floating leaves resembling small water-lily pads.

Propagation Method

The banana plant propagates naturally through runners that produce daughter plants, and through plantlets that form on mature leaves. You can also divide the rootstock. The banana-shaped tubers store the nutrients that fuel this new growth, so a healthy parent with plump tubers propagates readily.

Step-by-Step

1. Let the parent grow until runners carry daughter plants, or until plantlets form at the base of mature leaves.
2. Wait for a daughter plant or leaf plantlet to develop its own roots before separating it.
3. Gently detach the rooted daughter plant from the runner, or replant a mature leaf once roots emerge from it.
4. Plant each new plant so the tubers and rootstock are not entirely buried — leave them sitting at the substrate surface.
5. For tall floating pads, trim them back to encourage submersed leaf growth if you want the plant to stay low.

Conditions for Healthy Growth

The banana plant is easy to care for and tolerates minimal lighting, but it grows fastest and strongest under bright light and tropical temperatures. It can be grown rooted in substrate or as a floating plant. Leaf colour responds to light: green above and dull purple below in high light, and light green to yellow in low light.

Maintenance

Check that the tall floating lily pads are not shading out other plants, and trim them as needed. New leaves typically emerge within 7–14 days of planting when supported with root tabs and fertiliser. Although perennial, banana plants are best replaced every 4–5 years to keep the stand vigorous.

Common Challenges

The leaves are delicate and are commonly damaged in transit or handling, but the plant usually recovers and pushes new growth. Burying the tubers can cause them to rot, so always leave them exposed. Under low light the plant grows pale and slow, while unchecked floating pads can shade out the rest of the tank.