Weeping fig care: light, water and leaf drop

Light

The Illinois Extension files Ficus benjamina among houseplants needing high light at minimum, which means about 300 foot-candles: directly in front of an east or west window, or within 5 feet of a south one. Clemson describes the ideal as bright indirect or curtain-filtered sun, and adds that the tree will take some direct sun when humidity is high. Variegated cultivars such as 'Variegata' and 'Judith' grow best in somewhat lower light, so they suit the edge of a bright room rather than the sill.

Choose the spot before the tree arrives. Every change of light costs leaves, because the plant rebuilds its canopy for the new conditions. The RHS gives the same advice in plain terms: weeping figs dislike being moved, so once you find the right position, keep it there. Turning the pot a quarter turn now and then is fine; carrying it to another room for a party is not. In winter, pull it back a foot from cold glass rather than relocating it entirely.

Water

Three sources, three wordings, one idea. Clemson says keep the soil evenly moist during active growth, NC State says water just often enough to keep it from drying out completely, and the Illinois Extension asks for soil that is minimally moist at all times. In practice, push a finger two inches into the mix, the test the Illinois Extension recommends, and water when the top inch feels dry. Soak the pot until water runs from the drainage hole, then tip out the saucer.

The trap is that thirst and drowning look alike on this tree: both produce yellow leaves and a carpet of fallen ones under the pot. Check the mix before you react. A pot that is still damp an inch down after leaves start falling needs patience, not a drink. Use water at room temperature, since the Illinois Extension warns against cold water, and skip softened water.

Growth slows in the short days of late fall. Clemson advises letting the soil dry slightly between waterings in winter, and the RHS keeps the compost only just moist. A tree that has been pruned hard also needs less, because it has fewer leaves pulling water from the roots; Clemson recommends reducing watering after a severe cut.

Soil and pH

This is not a fussy plant about its potting mix. The Illinois Extension uses regular potting soil, Clemson a general-purpose mix, and NC State notes it grows well in a soil-based blend. The RHS suggests a loam-based compost with some fine bark chips mixed in, which adds weight and keeps the mix open. Weight is useful here: a 6-foot ficus in a light plastic pot of peat tips over easily.

What matters more is drainage. A drainage hole is required, and a mix that stays soggy for days after watering is the root rot Clemson describes. If an older tree sits in mix that has broken down to a dense mud, repotting into fresh soil does more good than any fertilizer.

Humidity

Sources differ a little. Clemson says weeping figs prefer high humidity, the RHS asks for medium to high, and the Illinois Extension says they do fairly well under normal household humidity. The honest reading is that the tree survives ordinary rooms but holds its leaves better with some moisture in the air, especially in winter, when the Illinois Extension notes most homes drop below 30 percent. A humidifier nearby or a tray of wet pebbles under the pot helps. Keep the tree away from heat registers, which both dry the air and blow on the leaves.

Temperature

Clemson gives the ideal as nights of 65 to 70°F (18 to 21°C) and days of 75 to 85°F (24 to 29°C), so a normally heated home is close to perfect. The RHS says most ornamental figs must be kept above 50 to 55°F (10 to 13°C), and NC State calls this species very frost sensitive and intolerant of cold. The danger point indoors is the window glass in January and the front door: a leaf pressed against cold glass or a blast of winter air is enough to start a drop.

A summer outdoors is possible. Clemson suggests morning sun and afternoon shade, then warns against parking the tree beside a heat vent or draft when it comes back inside, which causes heavy leaf loss. Expect some shedding after each transition anyway, since both moves change the light.

Fertilizer

Clemson recommends feeding healthy plants every month or two during the growing season with a liquid fertilizer, which is a little more generous than the general Illinois rule of every one to three months from March to September. The RHS suggests a high-nitrogen feed from spring to late summer to push leafy growth. Do not feed a tree that is dropping leaves after a move or a repot; it cannot use the extra salts until new shoots appear. Stop in winter, and flush the pot with plenty of plain water every few months, as the Illinois Extension advises, to clear salt buildup.

Work out the dose for your watering can with the fertilizer dilution calculator →

Repotting

The Illinois Extension notes that Ficus like their roots crowded in a small pot, and Clemson says weeping figs tolerate being slightly root bound. Repot only when the signs pile up: new leaves come in small, growth slows, roots escape the drainage holes. The RHS suggests moving to a slightly larger container every couple of years in spring, while Clemson puts the best time at late winter or early spring. Expect a few leaves to fall afterward; Clemson lists repotting among the classic leaf drop triggers.

A tree too large to repot can be top-dressed instead. The RHS recommends scraping off the top inch of old compost and replacing it with fresh mix in the years you do not repot.

• New leaves come in noticeably smaller than the old ones
• Growth slows even in good light
• Roots push out of the drainage holes or circle the bottom of the pot

Propagation

Clemson says the weeping fig can be air layered in any season and that cuttings root best in summer. Air layering, described step by step by the Illinois Extension, means cutting a third to halfway into a stem, packing the wound with wet sphagnum moss and wrapping it in plastic; roots show through the plastic after three to four months, and the rooted top is then cut free and potted. It is the better route for a thick branch. For a smaller plant, take a semi-ripe tip cutting in summer, remove the lower leaves, and root it in moist mix in a warm, bright spot. Wear gloves, because the cut stems bleed milky sap.

Methods: Air layering, Stem cuttings · Best season: air layering in any season; cuttings in summer.

Common problems

Leaf drop dominates every list of weeping fig troubles. Clemson names overwatering, underwatering, drafts, lack of nitrogen and low light as causes, plus moving and repotting; the RHS adds low winter temperatures and too much fertilizer. The useful question is what changed in the past few weeks. Diseases are rare indoors, but pests are not: spider mites and scale are the most frequent, followed by mealybugs, aphids and thrips. Washing the leaves occasionally with plain warm water, as Clemson suggests, keeps dust off and makes early infestations easy to spot.

Not sure which one it is? Try the plant problem diagnosis tool →

Is the weeping fig toxic to cats and dogs?

The ASPCA lists the weeping fig as toxic to cats and dogs. Its entries for Ficus benjamina give the toxic principles as a proteolytic enzyme, ficin, and a psoralen, ficusin, with gastrointestinal and dermal irritation as the clinical signs. In practice that means a pet that chews the leaves may vomit or drool, and contact with the milky sap can irritate skin. The RHS warns that the same sap can irritate human skin and aggravate allergies. Sweep up fallen leaves, which a bored cat may bat around and chew, and call your veterinarian or the ASPCA Animal Poison Control Center if a pet eats some.

Check any other plant against the ASPCA lists →