Boston Fern
Nephrolepis exaltata
also called nephrolepis
Arching fronds that brown off the moment the air dries; humidity does more for it here than anything you can feed it.
Spacing & sowing
- Plant spacing
- 23.6 in
- In-row spacing
- 23.6 in
- Between rows
- 2 ft 6 in
- Square-foot density
- Not suited to SFG
Growing
- Type
- Houseplant · Perennial
- Botanical family
- Mixed / other
- Sunlight
- Bright, indirect light — direct sun is too harsh for the fronds.
- Watering
- Keep the soil steadily moist, though never standing wet.
- Feeding
- A half-strength balanced feed once a month, spring through early autumn.
- Frost tolerant
- No
- Pruning
- Take dead and browned fronds off at the base as they appear.
Through the year
- Mar–Dec Spring Growth
- Jan–Mar Spring Growth
Pests & problems
- Mealybugs Mealybugs down at the frond bases
- Scale insects Scale insects under the fronds
- Root & crown rot Root rot where the pot is left waterlogged
- Brown frond tips from dry air, or from fluoride in tap water
Garden allies
Beneficial predators that hunt this plant's pests — grow their favourite flowers nearby to recruit them. companion plant
- Hoverfly Syrphidae
Bee-mimicking flies whose legless larvae graze aphid colonies clean while the adults pollinate. A ribbon of shallow, nectar-rich flowers kept in bloom all season recruits wave after wave of them.
- Ladybird (lady beetle) Coccinellidae
The gardener’s favorite ally: adults and their alligator-shaped larvae each eat thousands of aphids, plus scale, mealybugs, and other soft-bodied sap-suckers. Grow flat, open flowers for the adults and never spray a colony that ladybird larvae are already working.
- Green lacewing Chrysoperla carneaHunts Mealybugs
Its bristly larvae — "aphid lions" — impale aphids, mealybugs, thrips, and mite colonies, eating hundreds a week. Adults feed on nectar and pollen from small open flowers and overwinter in hollow stems left standing.
The Cottage Garden Companion — the gardener's herbarium at cottagegardencompanion.com