- Age of young plants
Each plant has a different time to be able to bear fruit. There are in a few months can be directly bear fruit, such as tomatoes, cucumbers, watermelon and papaya. There is a medium time between 6 s.d. 12 months, among them are dragon fruit, guava, lime, and starfruit. There is also a long fruit fruits such as srikaya, mini jackfruit, kelengkeng, pomegranate, cashew water, sawo, mango and wine. The above plants will generally be fruitful after more than a year old. - Too much fertilizer
All would like to see the plants thrive, leaved and has many branches. But what if it turns out the plant fails to bear fruit. Excessive fertilization, especially that many of its N elements may make the plant appear lush, green and healthy. However, this causes the canopy of the plant to become lack of sunlight to cook its food. - Barren plants
Most plants will only be able to bear fruit if the flower that is grown is fertilized by a male flower that is nearby. Some plants such as salak and coconut for example, usually must be planted in groups because often the male flowers fall first before could fertilize the female flowers. - Flowers that fail to be fruit
Sometimes we find the fruit plants have flowering bushy and look promising. But over time the flowers fall one by one and fail to become fruit. Usually this is due to the lack of water, insects and pests, extreme weather, and spraying that does not fit.
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Source : http://caramerawatbungamawar12.blogspot.co.id/2014/10/agar-tanaman-cepat-berbuah-lebat.html
Those are some things that cause your plants to fail to bear fruit. Next we will discuss ways to quickly plant fruitful. Let's discuss them one by one