How to Grow a Rubber Plant: A Detailed Guide to Cultivation Methods and Precautions

The rubber plant (Ficus elastica) is a plant grown mainly for its foliage, with relatively small leaves that stay evergreen all year round; if grown well, the leaves may even take on a deep red colour, which is very pleasing to the eye, and it is a plant that many people now like to buy and grow at home. However, most people want to gain an in-depth understanding of its cultivation methods when growing a rubber plant.

How to Grow a Rubber Plant

1. Soil: The rubber plant adapts well to soil and prefers loose, fertile humus soil, and it can tolerate light alkalinity and slight acidity. Small plants should be repotted every spring, while mature plants can be repotted once every two to three years. When growing it at home, in order to control the size of the plant, it is not advisable to repot it into a large pot.

2. Temperature: The rubber plant grows fastest at a high temperature of 30°C, but it fears extreme summer heat; when the weather is hot, attention should be paid to spraying water on the leaves to increase air humidity. It is not cold-hardy, and the overwintering temperature should preferably not be lower than 15°C; when the temperature is below 5-8°C, it is prone to cold damage.

3. Light: The rubber plant likes light, can tolerate direct sun and also tolerate partial shade, and it grows relatively well in a partially shaded environment. It likes warmth, is not cold-hardy, likes good ventilation, and poor ventilation will cause leaf drop. It likes moisture and is slightly tolerant of drought. It likes humid air; if the air is too dry for a long time, its growth will be poor and the leaves will become smaller.

Rubber Plant Cultivation Methods

1. Best propagation time: The best time to propagate the rubber plant is in spring and summer.

2. Watering method. The rubber plant likes moisture and humidity, but it dislikes waterlogging and is not tolerant of drought. In spring and autumn, keep the potting soil moist and frequently sprinkle water on the leaves and around the plant to increase air humidity. In summer, water evaporates relatively quickly and the rubber plant needs a larger amount of water, so it needs to be watered every day while also increasing the frequency of sprinkling. When the temperature is relatively low in winter, it is better to water just enough to keep the soil slightly moist; if the temperature is around 10°C, water appropriately more to avoid the potting soil becoming too dry and causing leaf drop.

3. Fertilising method. The rubber plant likes fertiliser, but it dislikes nitrogen fertiliser; when there is too much nitrogen fertiliser, the stem nodes grow excessively, the spacing between leaves increases, and the plant's shape becomes unattractive. Therefore, during the growing season, apply a compound fertiliser once every 20 days to young plants, adding a small amount of monopotassium phosphate solution. For mature plants, to control their height, applying a mixed fertiliser once every two months is sufficient.

4. Pinching. When the rubber plant grows to 30-50 cm tall, cut off the leaves and tender buds at the top. Usually the 2-3 side buds near the top sprout very easily, and after the side branches grow out, the tree shape becomes cup-shaped or Y-shaped; the pinching operation is extremely easy.

Precautions for Growing a Rubber Plant

1. The suitable growth temperature for the rubber plant is 25-30°C; in winter, if the temperature falls below 3°C, the leaves will turn yellow and drop. Therefore, in winter it should be placed indoors in a sunny spot, keeping the room temperature above 10°C. In summer, when the temperature exceeds 35°C, the plant should be moved to a cool, well-ventilated place for care, and water should be sprayed at the right time to lower the temperature.

2. The rubber plant is a plant of the mulberry family (Moraceae), and the whole plant contains milky sap. Therefore, after each pruning, charcoal powder should be applied immediately to avoid excessive sap flow causing dehydration and death.

3. During the seedling stage of the rubber plant, the direction of the pot needs to be changed regularly, in order to prevent the plant from growing towards one side, which would make the plant's shape less upright and affect its appearance.

What to Do If the Rubber Plant Grows Too Tall

1. Once the rubber plant has grown too tall, cutting it back is the best choice. To be honest, growing so tall is not very usual, which means this unusual situation needs to be dealt with, because if the plant grows relatively tall, its nutrients will be consumed, and problems will appear in its later growth.

2. So we need to cut off the branches and leaves at its top; this can control the speed of its vertical growth and make it grow horizontally on its own. Of course, we do not need to worry that its own growth will run into problems after we cut it back; as long as we can provide the water and fertiliser it needs, it will be able to grow without problems.

When growing a rubber plant, you must pay attention to temperature and light; temperatures that are too high or too low will affect its growth, and in summer, shading must be done well when it comes to light. Then, in terms of fertiliser and water, this is also very important and management needs to be strengthened; only in this way can its growth be guaranteed.