The bud will produce one or more spikes with a lot of flowers, each one having both female and male parts. Not all Aponogetons can be self-fertilized, but some can. To self fertilize, brush the spike with a small paintbrush for watercolors. If self-fertilization is successful, small green fruits will develop over the next week or two. They will open up to release floating seeds which will sink after a day or two.