Asparagus ferns (Asparagus setaceus, A. densiflorus) need bright indirect light of 10,000-20,000 lux, temperatures of 13-24C, and humidity above 50%. They are not true ferns but members of the Asparagaceae family. All parts are mildly toxic to cats, dogs, and children. In UK homes, they grow best on east or west-facing windowsills with regular misting to counter central heating dryness.
Key takeaways
- Asparagus ferns need bright indirect light of 10,000-20,000 lux — east or west-facing UK windowsills are ideal
- Humidity must stay above 50%, but UK central heating drops rooms to 30-40% in winter — mist daily or use a pebble tray
- All parts are toxic to cats, dogs, and children — the red berries are the most dangerous, causing vomiting and diarrhoea
- They are not true ferns but belong to the Asparagaceae family, closely related to edible asparagus
- Water when the top 2-3cm of compost dries out — roughly every 5-7 days in summer, every 10-14 days in winter
- A. setaceus trails elegantly for shelves, A. densiflorus 'Sprengeri' works in hanging baskets, and 'Myers' grows upright
asparagus fern house plants indoor plants Asparagus setaceus Asparagus densiflorus toxic plants UK houseplants
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