Mimosa is undoubtedly one of the most interesting houseplants. When it comes to care, they are not nearly as sensitive as the name suggests. However, this does not affect the leaf of the mimosa, which folds up when touched mechanically.
Why does the leaf of a mimosa fold up when touched?
The leaf of a mimosa has the ability to fold into feathers when touched or heated. This reaction serves self-protection and uses a lot of energy, which is why frequent touching of the leaves should be avoided. At temperatures below 18 degrees, the leaves no longer respond to touch.
Mimosa leaves fold up when touched
It's not just the spherical flowers of the mimosa that have a special appeal to many garden lovers. The leaf also looks very decorative because of its feathery appearance. It also has the peculiarity of folding when touched mechanically or when exposed to heat.
If you touch a leaf, a chain reaction often starts. First the touched leaf folds, then all other leaves follow. You remain in this position for about half an hour. Then they unfold again. The same thing happens if you approach the leaf with a lit match or lighter.
If the ambient temperature is below 18 degrees, the leaves no longer respond to the touch stimulus.
That's why you shouldn't touch the leaf of a mimosa too often
The folding process takes a lot of energy out of the mimosa. There are types of mimosa that have difficulty recovering from the strain of folding and unfolding. You should therefore touch the leaves as little as possible and do not expose them to the heat of a lighter or match frequently.
Wind and drafts have no influence on the leaves
While the stimulus on the leaf is triggered by a light touch from objects or fingers, wind and drafts have no effect on the leaves.
Why this is so is not yet known.
When the leaf of the mimosa turns yellow
Sometimes the leaves of the mimosa turn yellow. This is an indication of jaundice. It is triggered by too much moisture. Then keep the plant drier.
If small webs appear on the leaves, the mimosa is infested with spider mites (€16.00 at Amazon). Immediate combat is necessary.
Tip
Mimosa love being cared for outdoors in summer. You should ensure a protected place. The mimosa does not tolerate direct midday sun well.
