What you will not find in the wild are plants growing for long periods in very deep or muddy water. Such water does not allow enough light to pass through for plants to grow.
Some plants do grow in areas where the water is deep and turbid for parts of the year, but these plants typically lose their leaves when water conditions rob them of light, and then regrow their leaves and starts to flower when water levels drop, the current slows, and the water becomes clearer. While adaptive in the wild, this behavior is obviously undesirable in an aquarium plant.
Source: Sunken Gardens/ By: Karen A. Randall
