Default core simulator computes the growth of a kind of cherry tree for 25 years. 10 instances are quasi-simultaneously computed with a 9 trees layout (3m x 4m) and an isolated tree. a Plugin simulates tree timidity that stops meristems growth when they feel an axe belonging to an other plant into their neighbourhood. Axes diameter is computed thanks to another plugin according to the pipe model.

Trunk diameter evolution is plotted along time for the isolated tree and for the tree at the middle of the layout. As soon as timidity takes place, middle tree diameter is growing slower because of self pruning of its axes.