i recently watched a few videos on methods to grow short papaya trees.
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in one video, the guy took these steps: the bottom seeds of the papaya fruit were collected, put in water and the floating ones were kept, then the light colored seeds were separated from the darker seeds and these were planted in soil, after about a month, the seedlings were removed from soil and half of the main root was cut, some were not cut if the roots grew more laterally. these were replanted in pots. he said these three steps will guarantee a short female tree.
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in another video a papaya that was already grown from seed had the bottom stems regularly pruned off when they were perpendicular to the main trunk, and he would regularly pinch off flowers, not letting too many form and he said he always had fruit and they grow into short trees just a few feet tall.
has anyone tried these or any other methods? also, can someone explain the mechanisms/rationale behind these methods?