How to Grow Rubber Plant Indoors

a rubber tree by the window

The Spruce / Cara Cormack

Ficus elastica, also known as the rubber plant, is an unusual-looking varietal native to the tropics of Southeast Asia. It boasts oversized, oval-shaped leaves that are a rich emerald hue, and can grow quickly, reaching up to 100 feet tall in its natural habitat. However, it's more often grown indoors as a houseplant, where it can be planted and cared for year-round and its size kept more manageable.

When it comes to caring for a rubber plant, your job is pretty straight-forward. Simply give it enough light, water, and warmth (it is a tropical plant, after all), and you'll be rewarded with an exotic addition to your indoor plant collection.

Botanical Name Ficus elastica
Common Name Rubber plant, rubber tree, India rubber plant
Plant Type Evergreen tree
Mature Size 50–100 ft. tall (outdoors), 50–100 ft. wide (outdoors)
Sun Exposure Partial shade
Soil Type Moist but well-drained
Soil pH Acidic
Bloom Time Rarely blooms
Flower Color Rarely blooms
Hardiness Zone 10–12 (USDA)
Native Area Asia
Toxicity Toxic to dogs and cats
2:46

Watch Now: How to Grow a Rubber Plant (Ficus Elastica) Indoors

a rubber tree next to the patio door
Cara Cormack / The Spruce
a closeup of the rubber tree's leaves
Cara Cormack / The Spruce

Rubber Plant Care

While rubber plants are a pretty hardy varietal, they do have a few specific care requirements in order to find the right balance in their environment. That means providing lots of light, moist (but not soggy) soil, and enough fertilizer to keep it healthy.

The rubber plant has waxy-looking leaves that start out a pink-coral hue, eventually deepening to a dark rich green. As the rubber plant grows it will begin to droop, so it's important that you help support them by using a long wooden dowel (or bamboo stalk) to help keep them upright.

Light

Like most plants in their genus, rubber plants love lots of bright, diffused light. They can tolerate soft morning sunlight but should be moved out of the line of harsh direct rays in the afternoon as they can singe the leaves. Plants that do not receive sufficient light will become leggy, lose their lower leaves, and their leaf color will become dull instead of glossy and vibrant.

Soil

When it comes to their soil composition, rubber plants aren't picky. Typically, any good, fast-draining potting soil will likely do—many indoor gardeners opt for a cactus mix. In addition, rubber plants prefer an acidic soil mixture. Like fiddle leaf fig trees (which many believe they resemble), they also "eat" their soil and will eventually have their roots exposed. When this happens, simply top your pot with additional soil and it will not be an issue.

Water

Water your rubber plant frequently—they like to be kept steadily moist but not soaked. Rubber plants also are vulnerable to excessive dryness and don't tolerate drought well. To check if its time for another watering, check the moisture levels in the first few inches of soil—if they're dry and crumbly, it's time to water your plant again.

Temperature and Humidity

Like other types of ficus trees, these plants are vulnerable to cool drafts. Unhealthy plants will become leggy, with stretching internodes, and the leaves might first turn yellow and then brown before dropping off entirely. Generally, rubber trees are best kept in moderate to warm temperatures between 60 degrees Fahrenheit and 75 degrees Fahrenheit, with moderate humidity as well. If your home tends to be dry, invest in a space humidifier to increase the levels.

Fertilizer

Feed the plant a weak liquid fertilizer throughout the growing season. They are relatively heavy feeders when healthy. Some experts recommend only lightly fertilizing indoor plants to prevent stretching and plants becoming root-bound because they grow too fast.

Is Rubber Plant Toxic?

Rubber plants are toxic to pets (specifically dogs and cats), but how much so depends on the size and age of both your plant and your pet. The issue lies in the plant's milky sap, which is present in its leaves and stems. If you notice your pet exhibiting any of the below symptoms, contact a vet immediately.

Symptoms of Poisoning

  • Gastrointestinal irritation
  • Vomiting
  • Diahrrea
  • Oral irritation

Propagating Rubber Plant

Rubber plants can be propagated from leaf-tip cuttings, but it is not particularly straight-forward and is probably easier to just buy a potted plant. If you take cuttings, use a rooting hormone and be vigilant about high humidity and plenty of warmth. Do not be discouraged if they do not propagate easily. It is an inexact science that takes some time.

Repotting Rubber Plant

Rubber plants grow fairly quickly under the right conditions and will need to be repotted every year until the plant reaches the height you want. Larger plants can be difficult to repot, so if you can't move the container, scrape off a few inches of potting media and replace it with new potting soil.

Common Pests and Diseases

Rubber plants are vulnerable to a variety of pests that typically infest indoor houseplants, including aphids, mealy bugs, mites, scale, and whitefly. If possible, identify the infestation as early as possible and treat it with the least toxic option, like neem oil.