The rubber tree may be cultivated outside in the United States if the conditions are favorable. USDA Plant Hardiness Zones 9–11 apply to us (for us). Even in zone 9, it may require additional winter weather protection. Ideal temperatures range between 60 and 85 degrees Fahrenheit, which corresponds to these hardiness zones. Average rainfall is about 30 inches per year.
It's possible to grow rubber trees in US soil if you provide some protection from frost and don't put them in direct sunlight. The trees will grow roots that reach down into the soil and collect water and nutrients. Then they use those same branches to pull CO2 out of the air during photosynthesis just like any other plant.
You should allow at least 1 foot of space between the trunks of different trees for healthy growth. Rubber trees can get quite large, with trunk diameters up to 6 feet across. They should only be planted in full sun or light shade. If exposed to intense heat or cold, the trees will produce bitter fruit or drop their leaves. Water regularly during dry periods and feed occasionally. Fertilize once a year in late spring. It's best done according to the instructions on the fertilizer label.
Trees can live for hundreds of years if cared for properly. The young seedlings used in commercial production will be grown in nurseries under controlled conditions where they receive constant care and attention until they're big enough to ship off to planting sites.
Rubber plants thrive in warm temperatures ranging from 60 to 75 degrees Fahrenheit, although they can endure temperatures as low as 50 degrees in the winter. Average to high humidity is ideal, so if the air is too dry, spritz the leaves of your rubber plant. Direct sunlight causes the resin glands on the trunk to produce more latex, so keep an eye out for your plant's health and take action if you see any signs of stress. In general, rubber plants do well in bright conditions with some moisture during dry spells. They may be subject to mites and insects that live in humid environments. To protect your plant, use insecticide or herbicide according to the instructions on your package.
The rubber tree is a tropical tree. It requires a high temperature all year, ranging from 20 to 35 degrees Celsius, or an average monthly mean of 27 degrees Celsius. It is harmful if the temperature is less than 20 degrees Celsius. Similarly, rubber necessitates a lot of rain. It can withstand temperatures down to 0 degrees Celsius in the cold season but cannot stand more than 45 degrees Celsius in the heat season.
The soil needs to be well-drained. If it is not, then the roots will get waterlogged and this will cause the trees to produce small, unripe fruits known as pipols. The soil should also be rich in nutrients. If it is not, then the trees will suffer from malnutrition and fail to produce fruit even under healthy conditions.
The location should have a tropical climate. It must receive at least 200 millimeters of rainfall per year. If it does not, then the trees will not grow healthily and may even die.
Rubber trees prefer an altitude of between 100 and 500 meters above sea level. They do not like very high or low temperatures. The closer you are to the equator, the more sunlight there is for the tree to enjoy and the more rain it gets too. The further north or south you go, the less sun and rain there is so the tree will need to move to find similar conditions.
In warm to average indoor temperatures, the rubber plant thrives well in full sun or low light. Just be careful not to transfer it from one extreme to the other too quickly, or it will lose its leaves. If you remove all of the leaves from your rubber plant, then let them sit in a dark area for several weeks, it will stop producing flowers and instead produce seeds which will fall off of the plant when they mature. This is normal behavior for this type of plant, so don't worry about it.
Rubber plants may be grown outside in both sunny and shaded regions if you live in zones 10 through 12. Rubber trees grown outside in rich, well-draining soil may grow to be rather large (20 to 30 feet tall), so put them in a location where they can spread out a bit—or prepare to cut them. You should plan to fertilize your rubber trees annually to encourage growth.
The only pests that attack rubber trees are beetles, which usually don't do much damage except eat the bark of mature trees. To prevent beetle attacks, spray the trunk of young trees with insecticidal soap or dust them with sulfur before they reach maturity. If beetles do infest trees, pick them off immediately because they cannot be killed by pesticides. Do not try to burn or smoke out beetle nests; this will only attract more insects. If you discover brown patches on your tree's leaves or fruit, these might be attacked by a fungus or virus. Remove and discard affected parts of the plant. There are no other threats associated with growing rubber trees outdoors.
Trees grown for their latex will not produce fruit or seeds, so consider using them as an ornamental instead.
Plantation of Rubber Rubber plantations require an average temperature of 25–28°C, with a maximum temperature of 34°C. Atmospheric humidity should be around 80% with a moderate wind speed. The yearly rainfall in a region appropriate for rubber cultivation should be about 2000 mm. Rubber trees require roughly 20,000 hours of direct sunshine per year, or six hours each day. They will not grow in full shade but like some light exposure during the afternoon when temperatures are lower.
The soil in which the tree is to be planted should be well-drained but not completely dry at any time during the year. It should be rich in organic matter and moderately acidic (pH 5.5-7.0). It should be free of pesticides and herbicides.
Rubber trees have thick bark that grows back after being cut off during harvesting. This thin layer of tissue contains many large blood vessels that provide nutrients to the tender inner parts of the tree. The cut ends of the trees should be wrapped in plastic or covered with dirt to keep them from drying out.
After cutting down a rubber tree, it should be removed from its location immediately to allow the roots to regenerate themselves. The root system is vital for the survival of the tree. Without them, the tree would not be able to recover from damage caused by removal or transportation.
Rubber trees are grown commercially for their latex, which is harvested annually from the trunk.
Because of its tropical origin, it favors wet and humid air, although it may thrive in less humid conditions. Rubber plants are temperature sensitive and like to survive in locations with constant humidity and temperature. During the winter months, it can be dried out and exposed to freezing temperatures without damage.
The soil should be rich in organic matter to provide nutrients for healthy growth. It prefers well-drained soil but will not suffer from wet feet. It needs full sunlight to ensure that it produces leaves but is otherwise quite tolerant of moderate levels of heat or cold. Rubber trees have spiky green foliage made up of repeating pairs of leaflets. The flowers are small, yellow, and clustered together at the end of a branch. They appear between April and July, depending on the species. The fruit is a red-black berry which contains one seed and grows inside a podlike structure called a perianth. It is this property that causes rubber trees to lose their seeds when they fall to the ground - because they contain no flesh they will eventually rot away.
Some species of rubber tree are used as food sources by animals such as monkeys. The pods are eaten after they have fallen to the ground in order to extract the seeds. Monkeys then scatter the scattered seeds throughout their territory to help repopulate areas where the trees have been cut down for timber or other uses.