No, not usually compared with most plants like that.
They have woody stems
roses.
Water will go up the stems of roses. But roses will not transport water any where else.
Try watering with some Epsom Salts.
Orchids have strong stems.
Because of positive geotropism. All plants even the ones with weak stems do this.
No
No
herbs are very small plants with soft,thin and weak stems.
It means you will have a future with a husband/wife and 1 kid.
Potash stiffens the stems and improves colour.
Any grass plant would have weak stems because they are not woody. However, "cow grass" does not exist rendering this question moot.