Asparagus fern
Also known as
Foxtail fern, Sprengerās asparagus fern, Plume asparagus, Emerald fern
Keep this plantās care guide close at hand.
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Asparagus densiflorus, commonly called asparagus fern, is an evergreen perennial from southern Africa that is not a true fern but a member of the Asparagaceae. It forms dense, cascading mounds of wiry, often softly spined stems clothed in fine, needle-like cladodes that read as feathery foliage. In favorable conditions it produces small, fragrant white flowers in summer, followed by glossy red berries. The plant grows from fleshy, tuberous roots that store water and fuel vigorous regrowth, making it tough and forgiving indoors or in frost-free gardens. Popular cultivars include āSprengeriā with arching, trailing stems and āMyersiiā (foxtail fern) with upright, brush-like fronds. It prefers bright, indirect light, evenly moist but well-drained soil, and moderate humidity. Outdoors in warm climates it can spread and become weedy; container culture and deadheading are recommended. Handle with care, as stems can be prickly and the berries are mildly toxic.
Taxonomy
Properties & Requirements
How to care for Asparagus fern
Water
Keep soil evenly moist in spring and summer: water when the top 2ā3 cm (about 1 inch) dries, then water thoroughly until excess drains. Do not let the pot sit in water. The fleshy roots tolerate brief dryness but prolonged drought causes yellowing and drop; conversely, chronic sogginess leads to root rot. In winter, reduce frequency but never allow the root ball to bone-dry. Use rain or filtered water if tap water is very hard.
Light
Provide bright, indirect light. Morning sun or dappled light is ideal; harsh midday sun can bleach or crisp the cladodes, especially behind glass. In low light it survives but becomes sparse and leggy; increase light to thicken growth. Indoors, east or bright north windows work well; south or west exposures need a sheer curtain. Outdoors, give partial shade.
Nutrients
Feed during spring and summer with a balanced liquid fertilizer at half strength every 2ā4 weeks, or use a slow-release, balanced granular product at label rates. Pause feeding in autumn and winter when growth slows. Slightly acidic conditions help micronutrient uptake; if your water is hard, use rain or distilled water periodically and flush the pot monthly to prevent salt buildup, which can scorch the delicate cladodes.
Temperature
Best at 16ā24Ā°C (60ā75Ā°F). It tolerates brief warmth to ~30Ā°C (86Ā°F) with extra humidity, but avoid hot, dry drafts. Protect from cold; damage occurs below ~7ā10Ā°C (45ā50Ā°F). If summering outdoors, acclimate gradually and bring plants in before nights drop under 10Ā°C (50Ā°F). Avoid locations with sudden temperature swings, which can cause cladode yellowing and drop.
