How to Care for Foxtail Fern

Foxtail Fern (Asparagus densiflorus 'Myersii') is not a true fern but a member of the asparagus family, grown for its dramatic upright plumes of fine, needle-like foliage that resemble bushy fox tails. Tough, drought-tolerant and easy-going, it makes a striking houseplant, container specimen or landscape plant in mild climates.

Light

Provide bright, indirect light to part sun. Indoors, a spot near a bright east or filtered south/west window is ideal. Outdoors it enjoys morning sun with afternoon shade; intense, unbroken midday sun can scorch and yellow the plumes, while deep shade thins the growth. The stated range of bright indirect to part sun keeps the foliage dense and green.

Water

Water when the top inch of soil dries out. The plant grows from fleshy tuberous roots that store moisture, giving it good drought tolerance, so err on the drier side rather than keeping it soggy. Water thoroughly, let excess drain, and allow the surface to dry before watering again. Reduce watering in winter.

Soil & Potting

Use a well-drained, fertile potting mix; a general houseplant mix with added perlite works well. The vigorous tuberous roots can fill and even crack pots, so choose a sturdy container with good drainage. Slightly loose, airy soil suits the storage roots best.

Humidity & Temperature

Foxtail Fern is adaptable to average household humidity and tolerates dry air better than true ferns. It prefers warm conditions of 65-75F (18-24C) and is frost-tender, damaged below about 24-28F (-4 to -2C). In cold climates grow it in containers and bring it indoors before frost.

Feeding

Feed monthly through spring and summer with a balanced, diluted liquid fertilizer, or use a slow-release feed at the start of the growing season. Stop or greatly reduce feeding in fall and winter when growth slows. Do not overfeed, as the plant is not a heavy feeder.

Propagation

Propagate by division, the easiest method: unpot a mature plant and cut or pull the tuberous root mass into sections, each with plumes and roots, then pot up separately. It can also be grown from the seeds found in its red berries, sown in warm, moist soil, though division is faster and more reliable.

Repotting / Pruning

Repot every 1-2 years or when roots crowd or distort the pot, moving up one size in spring. The tubers exert real pressure, so repot before they crack the container. Trim any yellowed or damaged plumes at the base to keep it tidy; old stems can be cut away entirely and the plant will push fresh growth.

Common Problems & Pests

Yellowing plumes usually signal overwatering, poor drainage, or too much harsh sun; browning and needle drop often mean underwatering or very dry, hot air. Watch for spider mites, mealybugs and scale, especially indoors in dry conditions; treat with insecticidal soap or by wiping foliage. Root rot follows soggy soil.

Seasonal Care Tips

Growth is strongest in spring and summer, the time to feed, water regularly and repot. In fall and winter cut back on water and hold off feeding. Protect from frost by moving containers indoors or to a sheltered spot before cold weather. Refresh tired clumps by dividing in spring.