A rubber plant (Ficus elastica) grows best in bright, indirect light, with water only when the top 2 inches of potting mix are dry, in a room that stays between about 60 and 80°F. Give it a pot with a drainage hole, wipe the big leaves now and then, and feed lightly while it is putting out new leaves. Most problems, such as dropped lower leaves, droopy foliage, or a tall bare stem, come from too little light, overwatering, cold drafts, or never pruning. To get a fuller plant, cut the main stem back in the warm months and it will branch below the cut.
Light
Rubber plants handle a range of light, but they look their best near an east or west window, or a few feet back from a bright south window. A little gentle direct sun is fine, and plants with variegated or burgundy leaves keep stronger color in good light. In a dim corner, the plant stretches, spaces its leaves far apart, and sheds lower leaves. Rotate the pot a quarter turn every couple of weeks so it grows straight, and add a grow light in rooms that stay dim, especially during the short days of the year.
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Water when the top 2 inches of mix are dry, then water slowly until it runs from the drainage holes and empty the saucer. In bright, warm rooms during active growth that may be every week or so; in cool, dim months it may stretch to two or three weeks. Rubber plants dislike sitting wet. Yellowing lower leaves with damp soil are the classic sign of overwatering, while droopy leaves that perk up after a drink mean the plant went too dry.
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Temperature and humidity
Keep the plant in normal room temperatures and away from cold windows, exterior doors, and heating vents. Temperatures below about 50°F and sudden drafts can cause leaves to drop within days. Average household humidity is usually fine, though very dry heated air can brown leaf edges. Our guide to brown leaf tips on houseplants covers how to tell dry air from watering problems.
Soil, feeding, and repotting
Use a general indoor potting mix with some extra perlite or bark for drainage. Feed with a balanced liquid houseplant fertilizer at half strength about once a month while the plant is producing new leaves, and stop when growth slows. Rubber plants grow well when slightly snug in their pots, so repot only when roots circle the bottom or water runs straight through, typically every two to three years. Move up just 1 to 2 inches in pot width, since a much larger pot holds extra wet mix around the roots.
Pruning for a fuller plant
Left alone, a rubber plant tends to grow as a single tall stem. To make it bushier, prune in the warm months when it is actively growing. Cut the main stem just above a leaf or leaf scar at the height where you want branching. One to three new shoots usually form from the nodes just below the cut over the following weeks. You can also shorten long side branches the same way.
The stems bleed a milky latex sap that is sticky and can irritate skin and eyes. Wear gloves, put down a towel, and dab the cut with a damp paper towel until the flow slows. Keep the sap away from your face, and wash your hands after pruning.
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Propagating the cuttings
The tip you remove can root into a new plant. Take a piece 4 to 6 inches long with a few leaves, let the sap stop, remove the lowest leaf, and set the cutting in water or moist potting mix in a warm, bright spot. Roots usually form in a few weeks. Our guide to propagating houseplants from cuttings covers water versus soil rooting.
Why rubber plants drop leaves
A few lower leaves falling off over time is normal as the plant grows taller. Sudden drops of several leaves usually trace back to a recent change: a move to a darker spot, a cold draft, a heavy watering after a dry spell, or repotting. Fix the light and watering, keep conditions steady, and give it a few weeks. Rubber plants are relatives of the fiddle leaf fig and react to change the same way, so our guide on fiddle leaf fig leaf drop applies here too.
Pet and child safety
The Pet Poison Helpline lists the rubber tree (Ficus elastica) as toxic to dogs and cats. The sap in the leaves and stems can cause drooling, vomiting, and mouth or skin irritation if chewed. Keep the plant and pruned stems out of reach of pets and small children. If a pet chews the plant, call your veterinarian or the ASPCA Animal Poison Control Center at (888) 426-4435. If a child swallows part of the plant or gets sap in the eyes, call Poison Control at 1-800-222-1222.
Bottom line
Give a rubber plant bright, indirect light, let the top 2 inches of mix dry between waterings, and keep it away from cold drafts. Prune the main stem in the warm months to make it branch, wear gloves for the sap, and keep it where pets cannot chew it.
Related reading
- Fiddle leaf fig dropping leaves: causes and fixes
- When to repot houseplants
- Grow light basics for winter houseplants
- How to propagate houseplants from cuttings
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