The blooming of the iron tree has a strong regional character. The iron tree growing in the tropics will blossom and bear fruit every year after 10 years. Iron trees in the north have blossomed frequently in recent years, because iron trees are mostly cultivated as bonsai, and people pay great attention to all aspects of cultivating iron trees, from seedling cultivation to cultivation techniques to daily care. It is specific to the selection of high-tech fertilizer, the amount of water used, and so on. Iron trees growing in greenhouses are naturally easy to blossom and bear fruit. Moreover, the iron tree is a gymnosperm, it will blossom naturally when it reaches a certain age, but it is not normal if it does not blossom.
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Plants with strong regional characteristics can change their varieties through manpower.