Lecanopteris pustulata

Lecanopteris pustulata

Lecanopteris pustulata is an evergreen rhizomatous fern with creeping stems and glossy green fronds. Many mature fronds develop lobed or paw-like outlines, which explains the common name kangaroo paw fern, but the plant’s real growing character comes from the rhizomes that travel across the pot surface.

New fronds appear along creeping stems, so the plant gradually spreads over bark, substrate, stone or the edge of a container. Keeping those rhizomes firm, airy and lightly exposed is the key to long-term growth.

Kangaroo paw fern features

• Growth habit: Creeping rhizomes spread over bark, rock, potting mix, fallen wood or mounted surfaces.
• Fronds: Glossy, leathery leaves with entire, wavy or lobed margins depending on maturity.
• Plant group: Evergreen fern in the polypody family, Polypodiaceae.
• Container use: Suits pots, hanging containers or mounted culture when moisture and airflow stay balanced.

Rhizomes on trees, rocks and banks

Lecanopteris pustulata is native from south-eastern Queensland to south-eastern Australia, Norfolk Island, Lord Howe Island and New Zealand. In habitat it can grow on the ground, over rocks, fallen logs, cliffs and banks, or as an epiphyte on trees. This flexible surface-growing habit explains why it responds well to airy substrates and why the rhizomes should not be buried deeply.

The fronds emerge directly from the rhizomes rather than from a buried crown. A shallow pot, basket or mount lets the plant expand naturally, while dense wet substrate around the rhizomes can cause collapse before the foliage shows clear stress.

Moisture, airflow and exposed rhizomes

• Light: Give bright indirect light to partial shade. Harsh midday sun can scorch fronds, while very dark placement slows new growth.
• Watering: Keep the mix evenly moist during active growth, then water again when the surface begins to dry. The rhizomes should never sit in stagnant water.
• Substrate: Use an airy fern or epiphyte mix with bark, fibre, perlite and fine organic matter. It should hold some moisture but drain quickly.
• Humidity: Aim for moderate to high humidity with steady airflow. A humidifier, plant grouping or vitrine can help if indoor air is very dry.
• Temperature: Keep in a mild to warm range, ideally around 16–24°C indoors. Avoid cold wet conditions around the rhizomes.
• Feeding: Feed lightly in spring and summer with diluted balanced fertiliser. Fern roots and rhizomes are sensitive to salt build-up.
• Propagation: Divide healthy rhizome sections with attached fronds and roots. Keep divisions humid but airy while they re-establish.

Frond damage, soft rhizomes and pests

• Brown frond tips: Check for dry air, irregular watering or a root zone that dried too far. Correct both humidity and substrate moisture.
• Soft dark rhizomes: Usually caused by poor drainage, buried rhizomes or stagnant moisture. Improve airflow and remove collapsing tissue.
• Pale weak fronds: The fern may be too dark or depleted after a long growth period. Move it brighter gradually and feed lightly during active growth.
• Crisp patches on fronds: Direct sun or hot glass can burn the leathery surface. Move the plant away from harsh exposure.
• Scale or spider mites: Pests can settle along rhizomes and frond undersides. Inspect the creeping stems as carefully as the leaf surface.

Pet safety and rhizome handling

Lecanopteris pustulata is listed by NC State Extension as non-toxic for cats and dogs. It is still best kept out of chewing range, because damaged fronds and rhizomes take time to replace and the plant is grown for its visible surface growth.

Accepted name, older synonyms and sori

Lecanopteris pustulata belongs to Polypodiaceae. The accepted name is Lecanopteris pustulata, while older or alternative labels such as Microsorum pustulatum, Phymatosorus pustulatus or Zealandia pustulata may still appear in horticulture and fern references. The epithet pustulata means having pustules, referring to the raised sori on the underside of fertile fronds.

Pick Lecanopteris pustulata for a kangaroo paw fern with creeping rhizomes, glossy fronds and a surface-spreading habit that suits pots, baskets or mounts.