How To Care For Plants

How to care for a staghorn fern (Platycerium bifurcatum)

Platycerium bifurcatum

Care facts verified
Mounted staghorn fern (Platycerium bifurcatum) with antler-shaped fronds above brown shield fronds
Photo: ХомелкаCC BY-SA 3.0source

A staghorn fern is an epiphyte that grows on trees, not in soil, sending up antler-shaped fronds above flat brown shield fronds that clasp its support. Mount it on bark or hang it in a basket, water by soaking the rootball then letting it drain, and keep it warm, humid and in bright filtered light. Roots left sodden rot fast. It is non-toxic to pets.

Care at a glance

Light
Bright, filtered light or part shadeA few hours of gentle morning sun are fine; harsh full sun bleaches the antler fronds and burns off their silvery felt.
Water
Soak the rootball, then let it drain and dry slightlyDunk the mount in water for a few minutes every week or so in summer, less in winter; let the roots dry a little between soaks but never bone-dry.
Soil
Sphagnum moss on a bark mount — no ordinary potting soilIt is an epiphyte: tie the rootball in damp sphagnum to a board or grow it in a free-draining epiphyte mix, never dense compost.
Humidity
Wants warm, humid airMist the mount and keep it out of dry heated rooms; bathrooms and sheltered humid spots suit it best.
Temperature
Warm room, 15–24 °C (60–75 °F)Keep it above 10 °C (50 °F); it can summer outdoors in shade but must come in before the cold.
Difficulty
ModerateUnusual to mount and water, but tough once established — the main trap is letting the roots sit wet.
Pets
Non-toxic to petsNon-toxic to cats, dogs and horses per the ASPCA, with no toxic principles listed — one of the safest ferns for a pet home.

Where it comes from

Native rangeRainforests of Southeast Asia, Polynesia and subtropical eastern Australia, where it grows perched on tree trunks and branches

Propagation

Mature staghorn ferns produce pups — small offset plants that appear around the base of the parent, each forming its own shield and antler fronds. The simplest way to propagate is to wait until a pup has a few fronds and a patch of roots of its own, then ease it away from the parent with a clean knife, taking some of the surrounding sphagnum and root with it, and mount it on its own board or pot it into epiphyte mix.

Spores are the wild route — they form in dark felted patches at the tips of the antler fronds — but home-sown spores are notoriously slow and difficult, taking many months on sterile compost under humid cover. For most growers, dividing off rooted pups is far quicker and more dependable.

Common problems

  • Blackening, mushy fronds at the base

    Likely cause: Rot from a rootball that stays sodden and never dries between waterings.

    Fix: Cut watering right back, let the mount dry out properly between soaks, and improve airflow; remove any rotted tissue.

  • Worry that the flat brown shield fronds are dying

    Likely cause: Nothing wrong — the sterile shield (basal) fronds naturally brown and harden as they age while anchoring the plant.

    Fix: Leave them in place; never peel them off, as they protect the roots and feed the fern as they break down.

  • Antler fronds wilting, browning or losing their silvery coating

    Likely cause: Too little water and humidity, or harsh direct sun, or wiping off the protective felt by handling.

    Fix: Soak more regularly, raise the humidity, move it out of direct sun, and avoid rubbing the fronds.

Frequently asked questions

Should I remove the brown shield fronds on my staghorn fern?

No — leave them. The flat, browning shield fronds at the base are meant to be that colour; they clasp the mount, protect the roots, and feed the plant as they slowly break down. Peeling them off harms the fern. Only the green antler fronds should look fresh.

How do I water a mounted staghorn fern?

Soak it rather than sprinkle it. Submerge the rootball and moss in water for a few minutes, let it drain fully, then wait until it has dried slightly before the next soak — roughly weekly in summer and less in winter. Constant sogginess rots the roots.

Can I grow a staghorn fern in a normal pot of soil?

It is much happier mounted on bark or in a basket of sphagnum, because it is an epiphyte that clings to trees in the wild. Dense potting soil holds too much water around the roots and tends to rot them; an open, airy epiphyte setup is far safer.

Are staghorn ferns toxic to pets?

No. The ASPCA lists the common staghorn fern as non-toxic to cats, dogs and horses, with no toxic principles. Mounted high on a wall it is usually out of a pet's reach anyway, but it poses no poisoning risk if nibbled.

Sources

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