Definition - What does Overwatering mean?
Overwatering simply refers to supplying a plant or garden with too much water. This can cause the plant to “drown” (suffocate) and/or develop root rot. If not corrected in time, overwatering can easily kill a plant. Overwatering can occur in any growing method, including in-ground gardening, container gardening, raised bed gardening, and hydroponic systems.
MaximumYield explains Overwatering
Like all other living things on the planet, plants need water in order to survive. However, too much water can damage or even kill plants, just as it can other living things. Overwatering is the term used to describe when a plant has been given too much water and is not receiving enough oxygen to its roots.
In order for a plant to thrive, it needs several things, including light, nutrients, water, and oxygen. Of these, only light is not taken up by the plant’s roots. Overwatering causes the roots to be inundated with water for long periods, preventing them from absorbing the oxygen needed for healthy growth and normal cellular function.
If a plant is overwatered, the roots will eventually begin to die. Plants damaged in this way also become more susceptible to other problems, including fungal growth.
If you suspect a plant is being overwatered, it is important to look for specific signs. Edema is the formation of blisters on leaves and stems, and is caused by cells bursting due to excess water in them. Root and crown rot are also signs of overwatering, and stem rot can also occur. Sometimes, overwatering results in symptoms similar to under-watering; yellowing leaves, wilting, discolored leaves, and dropped leaves are all signs that a plant may be receiving too much water.
Make sure that plant roots have access to plenty of oxygen. Well-aerated soil will help ensure this. In a hydroponic growing set-up, make sure that the roots are not completely submerged for long periods, or consider the use of an air stone.