My undrained plastic tub is small. Dimensions about 6" square by 4" deep, with about 3" of substrate. One to two pints' capacity?Originally Posted by [b
I wouldn't say as a terrestrial with lots of flooding, but rather as a flooded anchored semi-aquatic, with periodic water fluctuation down to the surface level being tolerable only. It wants its leaves under shallow water as much as possible. The leaf structure of U. biloba is the typical feathery design of most other aquatic utrics.
U. dichtoma is different - it is a terrestrial that tolerates flooding. The morphology (such that it is) of the plant is that of a terrestrial utric.
I would not recommend growing U. biloba as a terrestrial with occasional flooding or water at the top of the soil, but by all means try as it unlikely to harm the plant - although I would have less confidence in successful/prolific flowering in such conditions.