Cut mimosa rarely, if at all
Maintain You the mimosa Annual only, you don't need to worry about pruning. The plant does not become so large and bulky that pruning is necessary.
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Even with perennial plants, you should think twice about whether you really want to do this to the mimosa. After the cut, the plant looks very neglected and torn. It can take a long time for her to recover from the stress.
It is also not certain that the mimosa will sprout again after pruning. In the worst case, it will die and must be disposed of.
Never cut back young mimosa
Young mimosas are generally not cut back at all. They do not sprout again when the shoots are trimmed.
Leave wilted leaves and shoots on the plant. They fall off on their own and can then be picked up and thrown away. If you remove the leaves by hand, this puts stress on the mimosa, weakening it and possibly leading to disease.
Prune roots when repotting
At the Repotting the mimosa you should check the roots. If there are rotten or diseased roots underneath, you can cut them off with a sharp knife.
Instead of cutting, sow new mimosas
If the mimosa has become very unsightly and out of shape, it makes more sense to grow new plants from seeds than to cut the plant back into shape or shorten it. In any case, in indoor culture, it rarely gets higher than 50 centimeters.
the Growing mimosas is quite easy and you are guaranteed to get decorative plants that you don't have to prune.
Tips
Since mimosas do not tolerate pruning very well, they are not ideal for breeding as bonsai suitable. Only experienced bonsai growers occasionally manage to bring mimosas into a bonsai shape by pruning them correctly.