When soil is waterlogged, plants literally drown. Water fills all the air spaces between the soil particles and this prevents oxygen from reaching the roots. In turn, this causes the soil to stagnate and prevents root growth. Symptoms:
plants may look like they need water because symptoms include yellowing leaves that wither and drop off. Wilting of the plant may also occur
the surface of the soil is soaking wet with puddles on it
when lifted, the plant roots are black, soft and soggy, and the soil smells of rotten eggs
plant growth is stunted or plants fail to sprout and shoots die back