Ipomoea aquatica, Water spinach seeds

Ipomoea aquatica is a semiaquatic, tropical plant grown as a leaf vegetable. It is found throughout the tropical and subtropical regions of the world, although it is not known where it originated. This plant is known in English as Water spinach, River spinach,Water morning glory.

Growing from seeds:

Those seeds have a really thick seed coat. To speed up germination, it is best to take a file and do some work on the seeds and then just put them into water and let soak until they start to germinate and can be planted. A pond is not necessary but a really wet ground will work fine too.