Average Water Needs; Water regularly; do not overwater. The leaves, stems, flowers and seeds of all varieties of Nasturtium are edible They have a pleasant, "peppery" flavor when added raw to salads, etc. The seeds can be especially "hot", but with a unique flavor. Use judiciously. The lower end of the "funnel" shaped flower can be bitten off and a tiny drop of nectar sucked out, much as with honeysuckle flowers.