The Foxtail Fern (Asparagus densiflorus 'Myers') is not a true fern at all — it is a relative of asparagus — but it looks like one, only better: dense, bottle-brush plumes of soft, needle-like leaves that arch outwards like a fox's tail. It is a superb plant for a hanging basket or a tall stand, where the plumes can cascade.
It is tougher than most ferns: it tolerates more light and drier air than a Boston fern, and it stores water in tuberous roots, so it forgives a missed watering. It still wants regular water and feeding to keep the plumes lush, and it sheds needles when it is unhappy — a mess, but a useful warning. One caution: the berries are toxic to cats and dogs, so keep it away from pets that chew. This guide covers light, watering, humidity, temperature, soil, repotting, feeding, propagation and the common problems that show up when something is off.
Foxtail Fern at a glance
| Care factor | What this plant needs |
|---|---|
| Botanical name | Asparagus densiflorus 'Myers' |
| Light | medium indirect |
| Water | weekly; keep soil lightly moist |
| Humidity | moderate to high |
| Temperature | 60–75°F (16–24°C) |
| Repotting | every 1–2 years |
| Pet safety | toxic to cats and dogs (berries) |
Light
Give your Foxtail Fern medium indirect light. A spot near an east- or west-facing window is usually ideal, or a metre or so back from a bright south-facing window. In the right light the plant grows steadily and keeps its colour; in too little light growth turns weak and stretched, and the plant loses the look that makes it worth growing. Our grow-light calculator can help work out whether your spot is bright enough.
Medium indirect light suits it — brighter than a Boston fern wants, but out of harsh direct sun, which yellows the plumes. An east-facing window or a bright spot a metre back from a south-facing window is ideal. In too little light the plumes thin out and the plant stretches.
Watering
Water: weekly; keep soil lightly moist. The golden rule is to check the soil before you water rather than watering on a fixed day — push a finger into the mix and water thoroughly only when it has dried to the depth the plant prefers, letting the excess run out of the drainage holes. Then empty the saucer so the plant never sits in standing water. Our watering calculator gives a starting point for your pot size, and the watering schedule generator can help you build a routine around it.
Keep the soil lightly moist — water weekly, when the top inch has dried. The tuberous roots store water, so it forgives a missed watering, but repeated drying makes the plumes yellow and shed needles. Water thoroughly, let it drain, and ease off a little in winter.
Humidity and temperature
Foxtail Fern needs moderate to high humidity and temperatures of 60–75°F (16–24°C). Humidity is the care factor most homes get wrong: heated indoor air in winter is far drier than most houseplants like, and the first sign is usually brown, crispy leaf edges. Grouping plants together, a pebble tray under the pot, or a small humidifier near the plant all help; a humidifier is the only method that reliably lifts humidity enough. Misting does very little — the water evaporates in minutes. Our humidity and temperature checker can tell you whether your room suits this plant.
Moderate to high humidity keeps the plumes lush and green. Dry air gives brown, crispy plume tips, so keep it away from radiators and group it with other plants. A pebble tray or a humidifier helps in winter.
Soil and potting
Indoors, Foxtail Fern needs a rich but free-draining potting mix. Standard potting soil on its own can hold too much water and compact over time, so mix it with perlite and orchid bark to keep air around the roots while still holding some moisture. A pot with drainage holes is not optional; without one, water has nowhere to go and root rot follows. Our potting-mix calculator can work out the parts for a homemade mix for your pot size.
Use a rich, free-draining mix with perlite and a little coco coir. The tuberous roots need room, so a wide pot suits it, and drainage holes are essential — the roots rot in waterlogged soil.
Repotting
Repot every 1–2 years, in spring, or sooner if roots are circling the drainage holes. Move up only one pot size — a pot that is too big holds wet soil the roots cannot use, and that is a fast route to rot. Our repotting calculator can help you work out the next pot size and how much fresh mix you will need.
Repot every 1–2 years in spring, moving up only one size. Foxtail ferns grow fast and fill their pots with tuberous roots, and repotting is the moment to divide the plant — see Propagation below.
Feeding
Feed during the growing season, in spring and summer, with a balanced liquid houseplant fertiliser at half the strength on the label, roughly once a month while the plant is actively growing. Do not feed in autumn and winter when growth slows. Always follow the directions on the label — more fertiliser is not better, and excess salts build up in the soil and burn the roots, which often shows up as brown leaf edges. If you have been feeding heavily, flush the soil with plain water occasionally to wash the salts out. Our fertiliser calculator can help you get the dose right.
Feed monthly at half strength in spring and summer. A fast-growing plant making dense plumes uses a fair amount of food, but overfeeding burns the plume tips, so stick to the label dose or less.
Propagation
Foxtail ferns are propagated by division. In spring, lift the plant and divide the root ball into pieces, each with several plumes and a good share of the tuberous roots, and pot each piece separately in moist, free-draining mix.
Keep new divisions warm, bright and humid until they establish, and expect them to sulk for a few weeks. Seed is possible but slow, so division is the practical route.
Common problems and fixes
| Problem | Likely cause | Fix |
|---|---|---|
| Yellow leaves | Overwatering | Let soil dry more between waterings; check drainage. |
| Brown leaf tips | Low humidity | Trim brown tips; raise humidity; use filtered water if tap water is hard. |
| Slow growth | Too little light or pot-bound | Give more bright light; repot if pot-bound. |
Yellow leaves
Likely cause: overwatering. Yellow leaves most often mean the soil has stayed wet for too long. Let the top of the soil dry out before watering again, check that the pot drains freely, and remove leaves once they are fully yellow. If several leaves yellow at once, check the roots — soft, black roots mean rot, and you should cut the rot away and repot in fresh mix. Water less in winter, when the plant grows more slowly and the soil stays wet for longer.
Brown leaf tips
Likely cause: low humidity. Trim the brown tips with clean scissors, following the leaf's shape, and raise the humidity around the plant — a pebble tray or humidifier helps more than misting. If your tap water is hard, switch to filtered or rainwater, since salts can also crisp the edges. Check the humidity with our humidity and temperature checker and move the plant away from radiators and hot, dry draughts.
Slow growth
Likely cause: too little light or pot-bound. First check the light: move the plant a little closer to a bright window and see whether new growth picks up over the next month. Then check whether it is pot-bound — roots circling the drainage holes mean it is time to repot into a pot one size larger with fresh mix. Do not try to force growth with extra fertiliser; a plant that is short of light or root room will not use it, and the salts can burn the roots.
Frequently asked questions
How often should I water Foxtail Fern?
Weekly; keep soil lightly moist. Check the soil with your finger before watering rather than watering on a fixed day — pots dry out at different rates depending on light, pot size and the season.
How much light does Foxtail Fern need?
It needs medium indirect light. Too little light gives weak, stretched growth, while harsh direct sun can scorch the leaves, so a bright spot out of direct midday sun suits most plants in this guide.
Is Foxtail Fern safe for cats and dogs?
According to the data used for this guide, this plant is toxic to cats and dogs (berries). Keep it out of reach of pets that chew plants, and if a pet eats any of it, contact your vet.
When should I repot Foxtail Fern?
Repot every 1–2 years, in spring, or sooner if roots are circling the drainage holes. Move up only one pot size so the fresh mix does not stay wet for too long.
Why is my foxtail fern shedding needles?
Shedding usually means the plant is too dry, too dark, or too cold. Check the soil first and water thoroughly, then check the light — a brighter spot helps. Old plumes shed naturally as new ones grow, but heavy shedding means something is wrong.