How often should I water Asparagus densiflorus?

Water when the top inch of soil feels dry. It prefers consistent moisture but dislikes soggy feet.

What kind of light does it need?

It thrives in bright, indirect light but can tolerate partial shade.

Can it be grown outdoors?

Yes, in frost-free climates, it can be grown outdoors in the ground or in containers.

Prune to shape or remove dead stems by cutting them back to the soil line.

Plant guide

Asparagus fern.

Asparagus densiflorus

Pronounced as-PAR-uh-gus den-sih-FLOOR-us

Also known as Asparagus Fern, Foxtail Asparagus, Sprenger's Asparagus, Sprenger's asparagus fern, foxtail asparagus-fern, foxtail fern, plume asparagus-fern

The Asparagus fern is a popular houseplant known for its feathery foliage. It's not a true fern but a member of the Asparagaceae family. This plant adds a touch of lush greenery to any indoor space.

At a glance

Care level: Easy
Plant type: Perennial evergreen
Light: Bright, indirect light
Indoor light: bright-indirect
Water: Every 7 to 14 days
Mature size: Up to 3 feet tall and wide
Growth rate: medium
Hardiness: USDA 9 to 11
Bloom time: Summer

Care

Keep the soil consistently moist but not waterlogged, and provide good air circulation. Watch for yellowing leaves, which can indicate overwatering or poor drainage. Trim leggy growth to encourage a fuller plant.

Watering: Water when the top inch of soil feels dry.
Feeding: Feed with a balanced liquid fertilizer during the growing season.
Pruning: Prune to maintain shape and remove any dead or yellowing stems.
Repotting: Repot when the plant becomes root-bound, typically every 1-2 years.
Soil: Well-draining potting mix
Soil pH: Slightly acidic to neutral (5.5 to 7.0)
Temperature: 16 to 24°C
Humidity: 40 to 60%
Drought tolerance: moderate
Lifespan: Perennial, long-lived.
Deer and rabbits: moderate

Signs it needs repotting

Roots are growing out of the drainage holes.
The plant dries out very quickly after watering.
Water runs straight through the pot without moistening the soil.
Growth appears stunted despite good care.

Safety

People: Ingestion of the berries may cause mild stomach upset.
Pets: Mildly toxic to pets if ingested, causing stomach upset.
Children: The berries, while not highly toxic, could pose a choking hazard for small children if ingested.
Contact allergens: The sap can cause skin irritation in sensitive individuals.
Airborne allergens: No significant respiratory allergens are noted.
Edibility: The berries are not considered edible for humans.

How to identify it

Arching stems with needle-like leaves
Leaves are bright green and soft
Small white flowers in summer
Red berries follow the flowers
Spreading, tuberous root system

Height: 0.6 to 0.9m
Spread: 0.6 to 0.9m
Leaves: green, evergreen
Flowers: white, 0.3 to 0.5cm
Fruit: red, Late summer to fall

Common problems

Spider Mites — Tiny pests that thrive in dry conditions, causing stippling on leaves and fine webbing.
Mealybugs — Small, white, cottony insects that feed on plant sap, weakening the plant.
Root Rot — Caused by overwatering, leading to soggy soil and fungal infections of the roots.

Growing it

Propagation: division, seed
When to plant: Spring, Summer
Overwintering: Indoors, protect from frost. Reduce watering slightly in winter and keep in a bright location away from heat sources.
In containers: Grows very well in containers, needing at least a 10-inch pot to accommodate its root system.

Division

Gently remove the plant from its pot.
Locate natural divisions in the root ball.
Carefully separate the divisions with a clean knife or by hand.
Pot each division into its own container with fresh potting mix.
Water lightly and keep in a warm spot with indirect light.

Seed

Sow seeds in a well-draining seed starting mix.
Keep the mix consistently moist and warm (around 70-75°F).
Germination can be slow and erratic, taking several weeks to months.
Transplant seedlings into individual pots once they are large enough to handle.
Provide bright, indirect light and consistent moisture.

Pair with plants that enjoy consistent moisture and bright, indirect light for a harmonious display.

Grows well with

Coleus — Coleus appreciates similar light and moisture conditions and adds a splash of contrasting color.
Impatiens — Impatiens provide lovely shade-loving color and help maintain soil moisture.
Ferns — Many ferns share similar preferences for shade and moisture, creating a lush, green display.

Keep away from

Cacti — Cacti generally require much drier conditions and more direct sun, making them poor companions.
Succulents (most) — Most succulents need excellent drainage and infrequent watering, which differs from Asparagus fern's needs.

Similar species

Asparagus setaceus (Common Asparagus Fern) — Similar delicate, feathery foliage but with a more climbing or trailing habit.
Asparagus aethiopicus (Sprenger's Asparagus Fern) — Has a similar growth habit but often with more arching stems and brighter green foliage.

Science

Family: Asparagaceae
Genus: Asparagus
Order: Asparagales
Class: Liliopsida
Native range: Eastern Cape Province of South Africa.
Conservation: Not of conservation concern.

In its native habitat, it grows in coastal scrub and forest margins, often in sandy soil.

Uses: Ornamental, Groundcover

Through the year

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Flowering

Fruiting

Foliage

Ecological indicators

Salinity: 4/9
Soil reaction: 6/9
Light: 7/9
Temperature: 7/9
Moisture: 5/9
Nutrients: 5/9

Taxonomy resolved against GBIF.

Questions people ask

How often should I water Asparagus densiflorus?: Water when the top inch of soil feels dry. It prefers consistent moisture but dislikes soggy feet.
What kind of light does it need?: It thrives in bright, indirect light but can tolerate partial shade.
Can it be grown outdoors?: Yes, in frost-free climates, it can be grown outdoors in the ground or in containers.
How do I prune it?: Prune to shape or remove dead stems by cutting them back to the soil line.

Where the name comes from

The scientific name 'densiflorus' comes from Latin, meaning 'densely flowered', referring to its numerous small white flowers.

Good to know

Also known as 'foxtail fern' or 'asparagus fern'.
It's not a true fern, but a member of the Asparagaceae family.
Prefers well-draining soil to prevent root rot.
Can tolerate coastal conditions and salt spray.

Is your asparagus fern looking unwell?

This page is a general guide. Pocket Botanist diagnoses problems from a photo of your actual plant, works out watering for your light and conditions, and reminds you when care is due.

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This guide was generated with AI and checked against GBIF taxonomy. It is general information, not horticultural or veterinary advice. Read about how we build these guides.