I would use the cultivated ones they sell for koi ponds etc.

1- they have prettier flowers
2- they have a slower less aggressive growth a and will not take over like the wild ones.

you can usually find bulbs for sale at lowes or home depot in the sping in the garden area.

you can start them in a pot or just plant the bulb in the pond bottom.

if you have lots or turtles or carp you might want to protect them to start

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