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How to Grow Nasturtinum:Choose a suitable nasturtium variety for your garden. The variety will depend on what you expect from the nasturtium, as well as the space you have available:Indian Cress - this is a vigorous trailing grower, good for a large garden; it's also known as the common garden nasturtium. The flowers come in shades of orange, yellow and red and it should flower all summer. This is an ideal plant to train up a trellis or fence.Dwarf nasturtium - a small bush variety, better for a smaller garden space. It has a wide range of flower shades and is easy to control in the garden.Peach Melba - has yellow flowers with orange-red centers, a popular addition to salads.Salmon Baby - has a unique orange-pink hue that looks great in the garden.Consider starting the seeds indoors. Nasturtiums are commonly started indoors so they'll begin to flower as soon as possible in the spring, after the last frost has passed. If you want to start your seeds indoors, plan to do so four to six weeks before the last spring frost. To start the seeds indoors,Plant each seed in a peat pot, which can be transplanted directly to the ground to avoid disturbing the roots. Use seed substrate, rather than potting soil.Keep the seeds in a bright window, and keep the peat moist.Plant the seedlings after the last frost of the spring has passed.Select a good planting spot. Nasturtiums like full sun, but they need to be shielded from midday summer heat. Since they're so low maintenance, Nasturtiums are excellent for growing in spots that need covering up or for those stark, unloved parts of the garden.Nasturtiums don't mind growing in a container; they'll flower just as profusely in a container as in the ground.Hanging baskets are also an ideal choice.Prepare the soil. Nasturtiums like loose, well-drained soil that retains moisture. They prefer soil that is not rich, so don't use fertilizer. If there is too much fertilizer in the soil, nasturtiums focus on producing more leaves rather than flowers.Avoid any area with heavy, wet clay soil.Direct sow or transplant seedlings after the last frost. If you're direct sowing seeds, plant them 10 inches apart and about ½ inch deep. If you're transplanting seedlings, keep them in their peat seed starters and plant them directly in the ground. This will prevent root damage. Keep the planting bed evenly moist.You can nick the seeds or soak them in warm water overnight to help them germinate more quickly.Direct sown seeds should sprout in seven to ten days.