Plant care guides
Boston fern care guide Nephrolepis exaltata
How to grow and care for Boston fern at home. Featured on IKEA covers 1973-1990.
- Light
- Medium / indirect light
- Watering (summer)
- Every 4 to 6 days
- Watering (winter)
- Every 8 to 12 days
- Pet safety
- Pet-safe (non-toxic)
- Difficulty
- Moderate
- Scientific name
- Nephrolepis exaltata
- Origin
- Tropical Americas
- Humidity
- 60-80%
Fun fact
Every cultivated Boston fern descends from one mutated plant spotted in an 1894 shipment of Nephrolepis sent to Boston, Massachusetts.
When and how much water
Water Boston fern when the top 1 to 2 cm of soil feel dry — ferns don’t like drying out. In summer that’s typically every 4 to 6 days; in winter slow down to every 8 to 12 days. Use room-temperature water and let any excess drain — never leave the pot sitting in standing water.
- Every 8 to 12 days
- Every 4 to 6 days
The real schedule depends on three things the calendar can’t see: the actual light at the plant, the pot’s size and material (terracotta dries faster than glazed ceramic), and your local humidity. Botanicaly’s app retunes the schedule from those signals on every reminder.
How bright a spot it needs
Boston fern thrives in bright, indirect light. Direct midday sun can scorch the leaves. The ideal lux range is 2,000 - 10,000 lux. In practical terms, place it 1-2 meters back from an east or west window, or behind a sheer curtain on a south window.
Feeding
Feed Boston fern every 30 days while it’s actively growing. Use a balanced liquid houseplant fertilizer at half the strength on the label, and only on soil that’s already damp — feeding dry roots can scorch them. When growth pauses, skip the fertilizer and let it rest.
Temperature & humidity
Boston fern is comfortable between 18 and 24 °C. Below 10 °C the leaves start taking damage, so keep it clear of cold drafts and unheated rooms.
It does best at 60–80% humidity. Misting every 2 days helps in dry rooms.
Common problems
Most Boston fern problems trace back to watering — here’s how to read the leaves.
Signs of overwatering
Watch for
- Yellowing fronds
- Mushy crown
- Root rot
- Sour soil smell
Let the soil dry further between waterings and make sure the pot drains freely — soggy roots are the usual cause.
Signs of underwatering
Watch for
- Crispy frond tips
- Browning fronds
- Dropping leaflets
- Drooping fronds
Water a little more often and don’t let the soil go bone-dry for long.
Toxic to pets?
NoPet-safe.
Boston fern is non-toxic to cats and dogs. Safe to keep in a home with pets.
Browse all pet-safe houseplants →
Pet-safety information for catalog plants uses ASPCA reference data where available. It is reference information, not veterinary advice.
Propagation
Grow more Boston fern from a cutting.
- Water the plant thoroughly the day before dividing — well-hydrated roots are more resilient.
- Slide the plant gently out of its pot.
- Shake off the loose potting mix to expose the root system.
Common questions
How often should I water a Boston fern?
Water your Boston fern (Nephrolepis exaltata) when the top 1 to 2 cm of soil feel dry — ferns don’t like drying out. In summer, that’s typically every 4 to 6 days; in winter, slow down to every 8 to 12 days. Botanicaly’s app tunes this further based on your home’s actual light, pot size, and local weather.
How much light does a Boston fern need?
Boston fern thrives in bright, indirect light. Direct midday sun can scorch the leaves. The ideal lux range is 2,000 - 10,000 lux. In practical terms, place it 1-2 meters back from an east or west window, or behind a sheer curtain on a south window.
Is Boston fern safe for cats and dogs?
Boston fern is non-toxic to cats and dogs. Safe to keep in a home with pets.
Why are my Boston fern’s leaves turning yellow or drooping?
On a Boston fern, yellowing and soft growth usually mean overwatering — watch for yellowing fronds, mushy crown, or root rot. Let the soil dry further between waterings and check drainage. If you see crispy frond tips, browning fronds, or dropping leaflets instead, it’s likely thirsty — water a little more often. Botanicaly’s Plant Doctor can help assess visible signs from a photo and suggest possible causes.
Botanicaly
A schedule that reads your room.
You don’t need to work out your Boston fern’s care from scratch each time. Botanicaly uses its saved setup and care history for the next step. Identifying is free. Pro adds Plant Doctor and Weather-smart care.
Still wet
Check again in 2 days
Botanicaly updates the next step when the soil isn’t dry.
