Collect Nasturtium seeds once they are plump and fall easily from the plant. Alternatively pick fallen seeds from under the plant. Place on a paper or cloth towel on a tray until they are fully dry. Nasturtium seeds remain viable for 5-7 years.

Collect Nasturtium seeds once they are plump and fall easily from the plant. Alternatively pick fallen seeds from under the plant. Place on a paper or cloth towel on a tray until they are fully dry. Nasturtium seeds remain viable for 5-7 years.