Nasturtiums are highly beneficial to your garden. I plant them year after year and they always have grown well for me. However, I have also had to buy seeds every year. This is a shame because nasturtiums seeds are very easy to collect. I hope to never need to buy them again. I have a vining type nasturtium growing in the garden now, and the seeds seem to be all over the place. Many of them fall right off of the plant and I just have to go out and pick them up. The picture shows a seed still attached to the plant. Just pluck it off. You will generally find these seeds in sets of two, but one must have already fallen off here. If they do fall of and you don’t get them, they should just grow for you next year. Once you have your seed collection, leave them out to dry. They will shrink up a decent amount and probably won’t be as big as the ones you would buy in a seed packet, but then most things you buy look very different then the ones you collect in a garden. I have yet to try growing my saved seeds, but next year will be the year. They are all healthy plants, so I don’t see why they wouldn’t grow for me.