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.

Light Bright, indirect light — direct sun is too harsh for the fronds.
Water Keep the soil steadily moist, though never standing wet.
Height 50 cm
Spread 23.6 in
Spacing 60 cm

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

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 carnea
    Hunts 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.