Ciscoe Morris, a gardening expert from Seattle, suggests that stressing plants will make them fruit or flower earlier. The stress promotes their reproduction because the plant thinks it is not going to last long. In my own experience, I have a potted kiwifruit start (from a cutting) that flowered after two years while my kiwifruit that is planted in the ground was planted four years ago as a one or two year old bare root and has yet to blossom.
It has been my experience that seedling apple rootstock will spur up and fruit many years sooner when it is repeatedly dug up every winter (when dormant), root pruned, then replanted. Maybe this overbalancing trick can be applied to euphorics Jacaranda's.
Same principle seems to apply to seedling apples left in 1 gallon pots too long. The growth on top, left unpruned seems to stress out the small amount of roots/dirt by drying it out very quickly (on a daily basis), leading to stress, leading to spurring up. Again a case of much more "top", overbalanced compared to the root mass.
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