tap water will cause a plant to droop because of the addititve such as flouride, rain water is best for plants
If the plant is being underwatered it may also droop. Peace Lily's for example, will droop when they need to be watered.
When plants lose enough water, their cells lose turgor pressure, which makes their cells and tissues less stiff, and cause them to go limp.
This can happen just when a plant loses enough water.
However, when they die, their cells begin to break down, releasing more and more water, which leads to the same process.
The cells lose water and become flaccid, which in turn causes the entire flower to droop (or 'wilt')
The vacuole in a plant cell holds water so when the vacuole is full with water, the plant cell becomes turgid (meaning swollen) so it fills up the space within the cell. This means that the cell membrane cannot droop and thus the plant cell holds its shape.
Answer
germination
Water is important in the plants shape as the pressure from the water in the cells help to keep the plants shape. When a plant is devoid of water it begins to droop, this means there is no water in the cells to help keep it upright.
When the water of the plant is sucked out of the plant, and the plant doesn't have anymore water so the leafs droop!
simply when they droop and get attracted by gravity.
Lack of its needs, water, sunlight...etc.
The Forget-Me-Not is a "shy" plant as touching it makes it droop. Placing a lighter under one of its leaves will cause it to droop then lets a little moisture into the air.
Something is happening in the growth.
it stops functioning and eventually dies wich makes the plant droop.
A Stroke!! see a dr!
Smooth muscles
Evan droop his head.
The first possibility would be a lack of water. followed by bad draining, or root diseases
The cells lose water and become flaccid, which in turn causes the entire flower to droop (or 'wilt')
why do plants droop when no water