Is a Foxtail Fern a Perennial? Yes, in Zones 9-11

By Sophia Martinez · January 23, 2026

Is a Foxtail Fern a Perennial?

Yes, a foxtail fern (Asparagus densiflorus 'Meyeri') is a perennial plant in USDA hardiness zones 9–11, where it grows year-round outdoors. In colder climates, it can be grown as a tender perennial indoors or as an annual outdoors during warmer months.

Understanding the Foxtail Fern

The foxtail fern, despite its name, is not a true fern but a member of the Asparagaceae family. Native to South Africa, this ornamental plant features dense, feathery foliage that resembles a fox's tail, hence the common name. It thrives in warm, humid environments and is widely used in landscaping and container gardening.

Key Characteristics

Botanical name: Asparagus densiflorus 'Meyeri'
Growth habit: Bushy, upright to spreading
Foliage: Soft, needle-like green "leaves" (actually cladodes)
Flowers: Small white blooms in summer, occasionally followed by red berries
Mature size: 2–3 feet tall and wide

Growing Conditions for Longevity

To ensure your foxtail fern survives year after year, proper growing conditions are essential. While it's naturally perennial in frost-free regions, gardeners in cooler zones must take extra steps to protect or overwinter the plant.

Climate Zones and Hardiness

The foxtail fern is winter-hardy in USDA zones 9–11. Below zone 9, freezing temperatures can kill the root system, making it behave like an annual unless brought indoors.

USDA Zone	Average Min Temp (°F)	Foxtail Fern Survival	Recommended Practice
9	20–30	Survives with mulch protection	Mulch heavily; cut back after frost
10	30–40	Evergreen perennial	Year-round outdoor growth
11	40–50	Thrives year-round	Minimal care needed
7–8	0–20	Roots die in freeze	Grow in containers; bring indoors
Below 7	Below 0	Not hardy	Treat as houseplant or annual

Table data source:1, 2

The data shows that foxtail ferns reliably survive outdoors only in zones 9 and above. In zones 7–8, survival depends on microclimates and protective measures like heavy mulching. Gardeners in colder zones should treat the plant as a container specimen for seasonal transitions.

Care Tips for Perennial Performance

Light: Prefers bright, indirect light or partial shade; avoid harsh afternoon sun.
Soil: Well-draining mix; amend garden beds with compost or use potting soil with perlite.
Water: Keep evenly moist but not soggy; reduce frequency in winter.
Fertilizer: Feed monthly during growing season (spring–summer) with balanced liquid fertilizer.
Overwintering: Bring containers indoors before first frost; place near east-facing window.

Common Misconceptions About Foxtail Ferns

Because of its delicate appearance and fern-like foliage, many assume the foxtail fern shares the same needs as true ferns. However, it is more drought-tolerant and sun-tolerant than most ferns, which prefer consistently damp, shady conditions.

Why It's Not a True Fern

True ferns reproduce via spores; foxtail ferns produce flowers and seeds.
It belongs to the Asparagus genus, related to edible asparagus.
More resilient to dry spells and minor neglect than most ferns.

About Foxtail Ferns: Common Questions

Is a foxtail fern a true fern?

No, the foxtail fern is not a true fern. It is a cultivar of Asparagus densiflorus, a flowering plant in the asparagus family. It produces small white flowers and red berries, unlike spore-reproducing ferns.

Can I grow a foxtail fern outdoors year-round?

Yes, but only in USDA zones 9–11. In colder zones, you should grow it in a container and bring it indoors before temperatures drop below 30°F (-1°C).

How do I overwinter a foxtail fern?

Before the first frost, move container-grown plants indoors to a bright, cool room (60–65°F). Reduce watering and stop fertilizing until spring. For in-ground plants in zone 9, apply a thick layer of mulch after cutting back dead foliage.

Is the foxtail fern toxic to pets?

Yes, the foxtail fern is mildly toxic to cats and dogs if ingested. The berries contain sapogenins, which can cause gastrointestinal upset. Keep out of reach of pets and children.

How fast does a foxtail fern grow?

It has a moderate growth rate, typically reaching 2–3 feet in height and spread within 2–3 years under optimal conditions. Growth slows in winter and accelerates in warm, humid summers.