Why should you not overwater potted plants?

Answer 1

It is not advisable to give excess water to plants because the soil will lose much of its nutrients and minerals. It will become too diluted.
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Plants that are not adapted to rooting in water (water-lillies, for example), will suffer from rot-rot and die off. Most plants need to root in soil that drains well - though they can probably stand short term flooding.

Answer 2

we should not over water potted plants because roots of plant take in air from the soil and if we over water the the plant then water will displace the air thus root will not be able to take in air .

Answer 3

When house plants or potted plants are over watered the following happens:

• The soil becomes supersaturated and oxygen (trapped in pore spaces in the soil) is forced out of the soil.
• Plants absorb most of their oxygen requirements from the soil, the lack of oxygen causes the cells to die, starting with the root hairs and moving on to the roots themselves.
• As the root hairs are dead or damaged the plant is no longer able to absorb water - this results in the plant wilting; in most cases the person caring for the plant sees the wilting as a sign of insufficient watering and waters the plant more - compounding the problem.
• As the root system is compromised osmosis cannot occur, in fact reverse osmosis starts to take place, this causes the mobile elements in the plant to start leaching from the plant and into the soil. This causes yellowing of the leaves, most notably the basal leaves (or those closest to the soil) are first effected.

The two symptoms combined are always a clear indication of over watering or root damage (basal leaves yellowing and the plant wilting).

Answer 4

Plants require three things in order to properly photosynthesize and make food for themselves in order to survive: water, light, and air (for CO2 among other things). Overwatering makes the plant unable to get the air it needs, and therefore it drowns.

Answer 5

The roots will not get air to respire. The roots will die and hence the whole plant will also die.