How Big Does Foxtail Fern Get? Size & Growth Guide

By James Wilson · January 24, 2026

Foxtail ferns typically reach a mature height of 2 to 3 feet (60–90 cm) and spread 3 to 4 feet (90–120 cm) wide, forming lush, arching clumps over several years. Despite its name, the foxtail fern (Asparagus densiflorus 'Meyersii') is not a true fern but a member of the asparagus family. It’s prized for its soft, feathery foliage and low-maintenance nature, thriving in both containers and landscape beds in USDA zones 9–11.

Growth Characteristics of Foxtail Fern

The foxtail fern is a popular ornamental plant known for its dense, fox-tail-like plumes of green foliage. Understanding its growth habits helps gardeners plan proper spacing and care.

Typical Size at Maturity

Height: 2–3 feet (60–90 cm)
Spread: 3–4 feet (90–120 cm)
Growth habit: Upright and arching, forms clumping mounds
Mature width often exceeds height due to lateral spreading

Factors Influencing Final Size

Several environmental and cultural factors affect how large a foxtail fern will grow:

Light exposure: Grows larger and fuller in bright, indirect light or partial shade.
Soil quality: Well-draining soil enriched with organic matter supports vigorous growth.
Water availability: Consistent moisture (without waterlogging) promotes healthy expansion.
Container vs. ground planting: Potted plants may stay smaller due to root restriction.
Climate: Performs best in warm, frost-free regions (USDA zones 9–11).

Comparative Growth Data of Asparagus Densiflorus Cultivars

Cultivar	Average Height (ft)	Average Spread (ft)	Growth Rate	USDA Zones	Light Preference
Asparagus densiflorus 'Meyersii' (Foxtail)	2–3	3–4	Moderate	9–11	Partial Shade
Asparagus densiflorus 'Sprengeri'	3–4	4–6	Rapid	9–11	Full to Partial Sun
Asparagus setaceus (Common Asparagus Fern)	2–3	2–3	Fast	9–11	Bright Indirect Light

Table data source:1, 2

The data shows that while all three cultivars have similar height ranges, the Sprenger fern spreads more aggressively and grows faster than the foxtail fern. The foxtail fern's moderate growth rate and controlled spread make it a preferred choice for structured landscapes and container gardening where size control is important.

Care Tips to Manage Foxtail Fern Size

If you want to keep your foxtail fern within a specific size range, consider these proven techniques:

Pruning and Maintenance

Trim back leggy or overgrown stems in early spring to encourage bushier growth.
Remove yellow or brown fronds to maintain appearance and reduce plant stress.
Regular light pruning helps control spread without harming plant health.

Container Growing for Size Control

Growing in pots naturally limits root expansion, which slows overall growth.

Use a container only 1–2 inches wider than the root ball.
Repot every 2–3 years to refresh soil and inspect roots.
Dwarf specimens can be maintained indefinitely in containers with proper care.

Common Questions About Foxtail Fern Size and Care

How fast does a foxtail fern grow?

Foxtail ferns have a moderate growth rate, typically adding 6–12 inches per year under optimal conditions. They reach full size in 3–5 years when planted in the ground in suitable climates.

Can foxtail ferns be kept small?

Yes, foxtail ferns can be kept small by growing them in containers, limiting repotting frequency, and pruning regularly. Their size is easily managed in patios, balconies, or indoor settings.

Do foxtail ferns spread invasively?

No, foxtail ferns are not considered invasive. Unlike Sprenger’s asparagus fern, they do not self-seed aggressively and grow in well-behaved clumps, making them safe for most gardens.

What is the difference between foxtail fern and asparagus fern?

The term “asparagus fern” refers to several cultivars of Asparagus densiflorus. The foxtail fern ('Meyersii') has upright, dense plumes resembling a fox's tail, while 'Sprengeri' has trailing, wiry stems. Foxtail is less aggressive and better for formal landscapes.

Does foxtail fern need full sun?

No, foxtail ferns thrive in partial shade to bright indirect light. Direct afternoon sun can scorch their delicate foliage, so dappled sunlight or morning sun with afternoon shade is ideal.

In summary, the foxtail fern reaches a manageable size of 2–3 feet tall and 3–4 feet wide, making it an excellent choice for accent planting, borders, or container displays. With proper light, water, and occasional pruning, it remains compact and visually appealing for years. Its non-invasive nature and soft texture add versatility to both indoor and outdoor spaces.