Rubber plant is one of the easier large houseplants. Clemson Extension calls it easy to grow, adaptable to a range of conditions and an excellent plant for beginners. Its problems usually come from a few predictable causes: a pot kept too wet, cold air, or a sudden drop in light.
This guide covers Ficus elastica, the rubber plant or rubber tree. NC State Extension describes it as an evergreen tree in the mulberry family (Moraceae), native to Southeast Asia. In the wild it can reach 30 m (100 ft). Indoors it is usually kept at 0.6–3 m (2–10 ft), and it rarely flowers.
Rubber plant care at a glance
| Factor | What the sources say |
|---|---|
| Light | Bright light, adaptable to low light; best with morning sun from an east window (Clemson). Protect from afternoon sun (NC State) |
| Water | Water thoroughly, then let the mix dry slightly to the touch (Clemson). Reduce from fall to late winter (NC State) |
| Temperature | 16–18 °C (60–65 °F) at night, 24–27 °C (75–80 °F) by day; avoid below 13 °C (55 °F) and cold drafts (Clemson) |
| Humidity | Prefers humid air but tolerates dry homes (Clemson, Missouri) |
| Mix and pot | Well-drained houseplant mix in a pot with drainage holes (Clemson) |
| Feeding | Spring and summer during active growth; less in low light (Clemson) |
| Repotting | Late winter or early spring, if needed (Clemson) |
| Propagation | Stem or tip cuttings, air layering (Clemson, Iowa State) |
| Pets | Toxic to cats, dogs and horses (NC State, ASPCA) |
Light: bright, but not afternoon sun
Clemson Extension says rubber plant prefers bright light but adapts to low light, and grows best with morning light from an east window. NC State recommends bright indirect light or partial shade with protection from afternoon sun.
University of Missouri Extension groups rubber plant with fiddle-leaf fig and weeping fig. It says these large figs are best grown in medium light and warns that low light may result in a drop of foliage. Missouri lists the general signs of too little light: long gaps between leaves, smaller new leaves, pale foliage, and yellowing lower leaves.
Too much direct sun causes scorch instead. The RHS uses a rubber plant to illustrate brown, scorched patches caused by strong direct sunlight.
Clemson notes that the cultivar ‘Robusta’ does well in low light. NC State also lists variegated cultivars, such as ‘Tineke’ (green and cream or pale yellow) and ‘Tricolor’ (cream, pink and green). For light levels by window, see our houseplant light guide.
Watering: let the top dry slightly
Clemson Extension advises watering thoroughly, then letting the soil dry slightly to the touch before the next watering. Use a pot with drainage holes, and empty the saucer after watering. NC State says to water regularly but avoid overwatering, and to reduce watering when the plant is dormant, from fall to late winter.
UF/IFAS describes rubber tree as drought tolerant and says container soil should become fairly dry between waterings. It adds that rubber tree makes a good houseplant if it is not overwatered. Missouri advises keeping the soil evenly moist. Read the sources together: moist through the root zone, drying slightly on top, never sitting in water.
A routine that fits:
- Push a finger into the mix. If the top feels dry, water.
- Water until it runs from the drainage holes.
- Empty the saucer or cachepot.
- In winter and in dim rooms, check less often. The mix will stay damp longer.
Clemson warns that leaf yellowing may follow soil that stays too wet. Our overwatered rubber plant guide covers the root check step by step.
Temperature, drafts and humidity
Clemson gives ideal temperatures of 16–18 °C (60–65 °F) at night and 24–27 °C (75–80 °F) by day. It advises avoiding temperatures below 13 °C (55 °F), sudden drops and cold drafts. NC State adds that rubber plant prefers to stay in one location and does not do well with drafts or cold.
Humidity matters less. Clemson says rubber plant prefers humid conditions but tolerates the dry air common in homes. Missouri also notes that indoor figs tolerate low humidity.
Mix, repotting and feeding
Use a well-drained houseplant mix (Clemson); NC State suggests a soil-based potting mix for indoor plants. Repot in late winter or early spring if needed (Clemson).
Clemson recommends feeding with a water-soluble houseplant fertilizer every two weeks during active growth in spring and summer, and less often for plants in lower light. Illinois Extension takes a lighter approach for houseplants in general: no more than every 1–3 months between March and September. In a dim room, use the lighter schedule. Illinois warns that too much fertilizer can burn roots, especially when growth is slowed in dim light.
Dust on large leaves cuts the light they receive. NC State and Clemson both advise wiping or washing the leaves with water.
Pruning, staking and propagation
Clemson notes that rubber plants may grow tall and lanky indoors. Support them with a stake, or prune in spring to rejuvenate them. NC State says pruning the main stems encourages a bushier plant, while leaving them unpruned gives a taller, tree-like form. The cut surfaces drip milky sap, so wear gloves and protect floors.
Clemson lists stem or tip cuttings and air layering as propagation methods. Iowa State Extension gives a full air-layering method for rubber tree:
- Choose a point on the stem 30–45 cm (12–18 in) from the shoot tip and remove leaves there.
- Make two cuts around the stem, 2.5 cm (1 in) apart, joined by a third cut. Remove the ring of bark and scrape the exposed surface.
- Dust with rooting hormone (optional; the stem roots without it, only more slowly).
- Wrap 1–2 handfuls of moist sphagnum moss around the wound, cover with clear plastic and tie above and below.
- When roots fill the moss, which Iowa State says takes several weeks, cut below the bottom tie and pot the new plant in well-drained mix.
Leaf problems and what to check
| What you see | Likely cause | What to check or do |
|---|---|---|
| Lower leaves yellow and drop, plant otherwise healthy | Normal ageing (NC State) | No action needed if new growth is healthy |
| Yellow leaves, mix still wet | Overwatering (Clemson, NC State) | Let the mix dry; check roots. See overwatered rubber plant |
| Leaves dropping after a move or near a door | Cold drafts, temperature drop, low light (NC State, Clemson) | Move away from drafts; keep above 13 °C (55 °F) |
| Brown spots or patches | Water problems, cold, sun scorch, edema or leaf spot | See rubber plant brown spots |
| Corky bumps or water-soaked blisters | Edema (Clemson HGIC 2251) | See rubber plant edema |
| Spots with yellow halos or rings | Fungal leaf spot or anthracnose (Clemson HGIC 2251) | See rubber plant fungal infection |
| Cottony white clusters, sticky leaves | Mealybugs or scale (Clemson, NC State) | Inspect stems and leaf undersides; see our pest guide |
Clemson HGIC 2251 notes that some leaf drop follows any big change in a plant’s surroundings, and that this should last only about three weeks. It describes edema as rough, corky swellings on the leaf undersides, linked to wet soil, poor light and low temperatures. Affected leaves will not recover, but watering less and improving light halts the decline.
NC State lists mealybugs, scales and spider mites as pests. Oklahoma State adds whitefly. Clemson says plant diseases are very rarely a problem indoors; root rot usually follows a slow-draining mix or overly frequent watering.
Is rubber plant safe for pets?
No. NC State Extension lists Ficus elastica as a problem for cats, dogs and horses. The ASPCA files Ficus species, with Indian rubber plant among the common names, as toxic to dogs, cats and horses. It names the proteolytic enzyme ficin and psoralen as the toxic principles. Clemson notes the sticky white sap may irritate skin, or the stomach if eaten. Keep it away from pets and young children that chew plants. For alternatives, see our pet-safe plants guide.
Choosing between two large statement plants? See philodendron vs rubber plant.
References
- NC State Extension Gardener Plant Toolbox: Ficus elastica
- Clemson Cooperative Extension HGIC 1510: Rubber Plant
- University of Missouri Extension, D. H. Trinklein: Lighting Indoor Houseplants, G6515
- Iowa State University Extension and Outreach: How can I propagate a rubber tree?
- UF/IFAS Extension, E. F. Gilman et al.: Ficus elastica: Rubber Tree (ST252)
- Clemson Cooperative Extension HGIC 2251: Houseplant Diseases & Disorders
- Royal Horticultural Society: How to help a poorly houseplant
- University of Illinois Extension: Houseplants: Care
- Oklahoma State University Extension: Rubber Plant plant profile
- ASPCA Animal Poison Control Center: Weeping Fig (Ficus sp.)