Foxtail Fern (Myers fern) care

Light

Bright but filtered. Foxtail Fern burns within days in unfiltered south-facing summer sun, and stops growing within months in deep shade. Bright, indirect light indoors, such as near an east- or west-facing window. Tolerates some gentle morning sun, but harsh afternoon sun scorches and browns the fronds. Outdoors it prefers partial shade. If you only have a south window, set the plant back 1.5 m or hang a sheer curtain — both knock the intensity down into the right range.

Watering

Watering foxtail fern: when the top 2-3 inches of soil are dry. The number that matters isn't the day of the week — it's how dry the top 2-3 cm of the pot feels. A finger in the soil tells you more than a watering app. After every watering, tip the saucer. Water thoroughly, then let the top 2-3 inches (5-7 cm) dry before watering again. The fleshy tuberous roots store moisture, making it drought-tolerant, but prolonged drought causes needle drop. Overwatering and poor drainage are the main causes of root rot.

Soil and pot

Foxtail Fern grows best in rich, well-draining, slightly acidic potting mix. Use a loamy, organically rich mix that drains freely. A blend of quality potting soil with added perlite (and some peat or compost) works well. Good drainage is essential to protect the tuberous roots from rot. A pot with a working drainage hole is non-negotiable for this species — even free-draining mix will turn soggy in a closed planter. If you love the look of a decorative pot without a hole, use it as a cachepot around an inner nursery pot you can lift out to water.

Humidity and temperature

Foxtail Fern sits happiest at around 40-55% humidity and 18-24 C (65-75 F). Prefers moderate humidity of around 40% or higher. Average household humidity is usually adequate, but dry indoor air encourages spider mites. A pebble tray or occasional misting helps in heated or air-conditioned rooms. If you keep the room above 18 year-round and avoid placing the plant near a cold draught, a hot radiator, or an air-conditioning vent, you have already handled the two biggest indoor stressors.

Fertilising

Feed foxtail fern sparingly. Feed monthly with a diluted balanced liquid fertiliser during spring and summer, or apply slow-release granules once at the start of the growing season. Stop or reduce feeding in autumn and winter when growth slows. Skip fertiliser entirely on a stressed, recently-repotted, or actively wilting plant — fertiliser salts make damage worse, not better. Wait for a round of healthy new growth before resuming a feeding rhythm.

Common problems

Below are the issues we see most often on foxtail fern in the Growli community. Each is annotated with the most common cause so you know where to start.

• Yellowing fronds — Usually from inconsistent watering (too much or too little) or unsuitable light. Check that soil drains well and the plant isn't sitting in water; adjust watering to the top-2-3-inches-dry rule.
• Browning or scorched tips — Caused by too much direct sun, heat, or very dry air. Move out of harsh afternoon sun. Some browning of older interior fronds is natural as dense growth shades out lower stems.
• Spider mites — The most common pest indoors, thriving in dry air; they leave fine webbing between needles and cause yellowing and drop. Raise humidity, rinse the foliage with water regularly, and treat with insecticidal soap if needed.
• Root rot — From overwatering or poor drainage. Yellowed leaves that drop easily plus mushy, brown roots are signs. Use a free-draining mix, empty saucers, and let the soil surface dry between waterings.
• Needle (cladode) drop — Often a response to drought stress, sudden environmental change, or being root-bound. Keep watering consistent, avoid letting the rootball fully dry out, and repot or divide when crowded.
• Mealybugs — White cottony clusters can appear in dense foliage and at stem joints. Wipe off with an alcohol-dipped cotton swab or treat with insecticidal soap, repeating until clear.

Propagation

Easiest by division: lift the plant, cut or pull the tuberous rootball into sections that each have both fronds and roots, then pot each up in fresh well-draining mix. It can also be grown from the seeds inside the ripe red berries, but this is slower. Wear gloves, as the sap can irritate skin. Propagation is the cheapest, most satisfying way to expand a collection — and it doubles as insurance against losing a mature plant to an accident. Take a backup cutting once the parent is established and healthy.

Toxicity to pets

Foxtail Fern is toxic to pets. The ASPCA lists Asparagus densiflorus (asparagus fern) as toxic to both cats and dogs; the 'Myersii' foxtail fern is the same species. Despite the name it is not a true fern. It contains steroidal saponins concentrated in its red berries, and berry ingestion can cause vomiting, abdominal pain, and diarrhoea, while repeated skin contact with the sap can cause allergic dermatitis. If you keep cats, dogs, or curious children in the house, weigh placement carefully — a high shelf or a hanging planter is enough for casual safety. For severe ingestion incidents, call your local vet and the ASPCA Animal Poison Control Center (in the US, 888-426-4435).

Pet-safety status is sourced from the ASPCA Toxic and Non-Toxic Plant List, which catalogues the most-asked-about plants for cats, dogs, and horses.

Foxtail Fern deep-dive guides

Every aspect of foxtail fern care, each with its own calibrated guide:

• Foxtail Fern watering schedule
• Foxtail Fern light requirements
• Best soil mix for foxtail fern
• Foxtail Fern fertilizing guide
• When to repot foxtail fern
• How to propagate foxtail fern
• Foxtail Fern growth rate & size
• Foxtail Fern cold hardiness
• Foxtail Fern temperature & humidity
• Is foxtail fern toxic to cats & dogs?

Related guides

Foxtail Fern is also known as Foxtail fern, Myers fern, Myers asparagus fern, Plume asparagus, and Foxtail asparagus fern.

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• All 569 plant care guides in the Growli library