Emergence and early growth of Eleocharis kuroguwai, Potamogeton distinctus, and Sagittaria pygmaea were examined at 10, 14, 18, 22, 26, and $30^{circ}C$ of soil temperatures using soil temperature gradient bath. Eleocharis kuroguwai emerged at $14^{circ}C$ or higher temperature and % emergence was increased as soil temperature increased up to $26^{circ}C$ but decreased at $30^{circ}C$. Percentage of emergence in Potamogeton distinctus was very low at $10^{circ}C$ but most of them were emerged at $14^{circ}C$ or above. Emergence rate was faster as soil temperature increased. Percentage of emergence in Sagittaria pygmaea was increased until 10 days after planting as soil temperature increased but final percentage of emergence was 100% at all temperature. Number of days required for 80% emergence was shortened as soil temperature increased and Eleocharis kuroguwai and Potamogenton distinctus required longer duration to emerge compared to Sagittaria pygmaea. Eleocharis kuroguwai and Potamogeton distinctus required higher accumulated soil temperature for emergence compared to Sagittaria pygmaea. Optimum soil temperature for early growth after emergence of Eleocharis kuroguwai, Potamogeton distinctus, and Sagittaria pygmaea were 26, 18-22, and 18-$26^{circ}C$, respectively.