Nasturtiums are easy to grow, choose a well-drained site with soil that is not too rich in nitrogen. Nitrogen will promote lots of lush leaves but few flowers.
In areas with cool summers, nasturtiums grow well in full sun, but in hot summer areas, afternoon shade and plenty of moisture give best results.
To get a faster germination soak your seeds in some warm water overnight and then place directly in the garden or pots. Nasturtiums are annuals so plant the seeds in spring when the danger of frost has passed. Once they are established, nasturtiums will continue to spread and bloom until the first frost, with very little work.
Organically grown nasturtiums are fantastic! The leaves and flowers add a peppery taste to salads, butter and cream cheese.
You can find many colors and mixtures of nasturtium seeds available in the seed racks of garden centers, botanical gardens and big box stores. You can also order on line. Baker Creek Heirloom Seeds has a good selection, their website is http://www.rareseed.com.