Growing ferns indoors gives you lush foliage and a way to add greenery to rooms with gentle, indirect light. Choose a fern that suits your home, then provide steady moisture, humidity, and a loose potting mix without leaving its roots waterlogged.
Before you begin, check the plant’s label for its preferred conditions: ferns vary, and a bird’s-nest fern does not need exactly the same care as a Boston fern. Most indoor ferns do best away from harsh sun, heating or cooling vents, and sudden changes in temperature. You will need a pot with drainage, an appropriate indoor potting mix, and a watering can. A humidity tray or room humidifier can help if your air is dry, but neither is essential in every home.
What You’ll Need
- A healthy fern suited to your available light and space.
- A pot with drainage holes, sized to fit the root ball without leaving a large excess of soil around it.
- A loose, moisture-retentive indoor potting mix, preferably one described as suitable for ferns or foliage plants.
- A watering can or other way to water gently.
- A saucer to catch runoff; empty it after watering.
- Optional: a room humidifier, humidity tray, or clean pruning scissors.
Step-by-Step
- Choose a fern for your conditions. Read the care label before buying and note the light and moisture preferences. Boston ferns tend to produce arching fronds and can spread, so allow room for their shape. Bird’s-nest ferns have upright, undivided fronds and are often suited to a compact display. Maidenhair ferns are delicate and can be less forgiving of drying out. These are general tendencies, not guarantees; the plant’s label and condition matter. Avoid a specimen with extensive crispy or yellow foliage, damaged growth at its center, or visible pests.
- Find a suitable place. Put the fern in bright, indirect light or in the softer light recommended for that kind. A spot near a window with a sheer curtain can work; a little farther from a bright window may suit a shade-tolerant fern. Avoid prolonged direct midday sun, which can scorch fronds, and very dark corners, where growth may weaken. Keep the plant away from radiators, fireplaces, air-conditioning outlets, and drafty doors. If you are unsure, observe the spot through the day before placing the fern there.
- Select a pot with drainage. The pot should have holes so excess water can escape. Choose one only modestly wider than the root ball; a pot that is much too large holds more wet mix than the roots can use. Material affects how quickly the mix dries: porous clay usually loses moisture faster than glazed ceramic or plastic. Whichever you choose, make watering decisions by checking the mix rather than relying on a fixed schedule.
- Use a suitable mix. Fill the pot with a loose indoor mix that holds some moisture but does not become dense and soggy. Fern roots need both water and air. If the mix from the nursery is compacted or drains poorly, replace it with fresh fern-appropriate potting mix. Do not use garden soil in an indoor pot; it can compact and may bring unwanted pests or organisms inside. Moisten the mix lightly before potting if it is very dry, so it settles around the roots more evenly.
- Pot the fern at its existing depth. Slide the plant from its nursery pot while supporting the root ball, and handle the fronds gently. Set it in the new pot so the base of the plant remains at about the same level as before. Fill around the root ball, then press the mix lightly to remove large air gaps without packing it hard. Keep the crown—the point from which new fronds emerge—above the soil. Water until excess drains from the holes, then empty the saucer.
- Water according to the mix, not the calendar. Check the surface and the mix just below it with a finger. Many indoor ferns prefer evenly moist soil, so water when the surface begins to feel slightly dry, before the root ball dries out completely. Water slowly over the soil until runoff appears, then let the pot drain. Do not leave the pot standing in water. A smaller pot, warm room, or porous container may dry sooner; cool conditions and a larger pot may slow drying. Adjust your checks to match what you observe.
- Raise humidity when the air is dry. Ferns generally appreciate humid air, but misting is not a dependable way to keep humidity high: its effect is brief, and wet foliage in stagnant conditions may encourage problems. A room humidifier can provide steadier moisture in the air; follow its care and cleaning directions. Grouping plants can modestly improve the local environment. A tray filled with pebbles and water is another option, but set the pot above the waterline rather than in it. If frond edges keep drying, assess room humidity and drafts as well as watering.
- Keep care steady and feed sparingly. Avoid frequent moves between very different conditions. Turn the pot occasionally if growth leans toward the window, while taking care not to expose newly turned foliage to stronger direct sun. During active growth, use a balanced houseplant fertilizer only as directed on its label; excessive feeding can harm roots and foliage. If the fern is not growing, or light and temperature are limited, do not compensate with extra fertilizer. Remove fully dead fronds with clean scissors, cutting near the base without damaging emerging growth.
- Repot only when there is a reason. A fern may need a larger pot when its roots fill the container, water runs through unusually quickly because the root ball is crowded, or growth becomes difficult to support. Move it into a pot only a little wider, using fresh mix and keeping the crown at its original depth. Repotting is not a cure for every drooping plant: first check moisture, drainage, light, and pests. After repotting, water thoroughly and let the plant settle in a stable spot.
Common Mistakes
Letting the root ball dry completely. Some ferns react poorly to drying, especially those with fine or delicate foliage. A dry root ball can lead to crisp fronds and browning edges. Check the mix regularly and water before it dries all the way through, while still allowing excess water to drain.
Keeping the soil constantly saturated. Moist is not the same as waterlogged. A pot without drainage, a blocked hole, or water left in the saucer can deprive roots of air. Check that runoff can escape and empty the saucer after watering.
Putting a fern in harsh sun or a dark corner. Direct sun may scorch foliage, while insufficient light can cause weak growth. Match the location to the fern’s label and use indirect light as a starting point for many common houseplant ferns.
Assuming misting fixes dry air. A quick spray does not maintain room humidity. If the air is dry, consider a humidifier or a better location, and also check for heat vents and drafts.
Using an oversized pot or feeding too much. Excess potting mix stays wet for longer, and excess fertilizer can damage roots. Choose a close-fitting pot and follow fertilizer directions rather than applying more to encourage faster growth.
Tips
- Check the soil before watering, and note how quickly it dries in your particular room.
- Choose a location based on the plant’s light needs, not just its appearance on a shelf.
- Use a pot with drainage even if you prefer a decorative outer planter; remove the inner pot to water, let it drain, then return it.
- Keep leaves clear of dust by gently wiping sturdy fronds with a damp, soft cloth. Handle fragile fronds carefully.
- Look over both sides of the fronds and the plant’s base when you water. Early pest detection makes it easier to isolate a problem.
- Expect some adjustment after bringing a fern home. Keep conditions steady and judge its progress by new growth, not only by older fronds.
Troubleshooting
Frond tips or edges are brown and crisp: Check whether the mix has dried too far, whether the room is dry, and whether a vent or sunny window is hitting the plant. Correct the cause gradually. Trim only fully dead parts; brown tissue will not turn green again.
Fronds are yellowing or the plant is drooping: Feel the mix before watering. If it is wet, check drainage and empty standing water; let the pot drain and allow the surface to dry slightly before watering again. If it is dry, water thoroughly and let it drain. Also review light and recent changes in temperature or location. Drooping alone does not identify one specific cause.
Growth is sparse or stretched: The fern may need brighter indirect light. Move it gradually to a brighter suitable spot, rather than placing it directly in strong sun. Check that the plant is not crowded by nearby objects or shaded for most of the day.
Fronds look scorched or faded: Move the plant out of direct sun and inspect for heat from nearby glass or a heating source. Keep it in a stable position with gentler light. Damaged areas will not recover, but healthy new fronds can show whether conditions have improved.
You see tiny insects, webbing, or sticky residue: Isolate the fern from nearby plants and inspect the undersides of fronds and around the crown. Identify the pest before choosing a treatment, and follow the treatment label. Avoid applying a product not intended for indoor plants or using it contrary to its directions.
The pot smells sour or stays wet for a long time: Check for blocked drainage and remove any water in the outer pot or saucer. If the mix remains dense and saturated, repotting into a loose, fresh mix and a draining pot may help. Do not add water simply because the foliage is drooping; wet roots can also cause a limp appearance.
Frequently Asked Questions
How often should I water an indoor fern?
There is no reliable schedule for every home. Check the mix often and water when its surface begins to feel slightly dry, adjusting for the fern, pot, room, and season. Let excess water drain away.
Can ferns grow in low light?
Some tolerate lower light, but tolerance does not mean they thrive in a dark room. Provide the light recommended for the species, usually bright indirect light for many common indoor ferns, and watch for weak or sparse new growth.
Should I mist my fern?
Misting is optional, not a lasting humidity solution. If dry air is causing recurring crisp edges, address the room conditions or use a humidifier according to its directions.
Why is my fern losing leaves after I bring it home?
A change in light, humidity, watering, or temperature can stress a plant, and older fronds may also die naturally. Keep care steady, remove fully dead fronds, and watch for healthy new growth or signs of pests.
Do indoor ferns need fertilizer?
They may benefit from fertilizer during active growth, but feeding is not a substitute for suitable light, water, and drainage. Use a houseplant fertilizer only according to its label and avoid overfeeding.
Can I put my fern in a bathroom?
A bathroom can suit a fern if it has adequate light and stable conditions. High humidity alone is not enough; a dark bathroom or one with strong temperature swings may not be suitable.