Nasturtiums provide brilliant color and emit a delicate spicy fragrance making them a popular plant for sunny gardens. Available in both climbing and dwarf varieties, the scalloped foliage adds depth and dimension to planters and hanging baskets. Added to window boxes, nasturtiums provide a splash of color that brightens the entire box. These easy-to-grow plants germinate quickly when planted under ideal conditions. Plant nasturtiums in the spring after the danger of frost has passed in your area and the soil has warmed.
Soak nasturtium seeds overnight in a bowl of lukewarm water to speed the germination process. Drain any excess water from the bowl and plant the seeds immediately.
Sow nasturtium seeds to a depth of ½ inch and firm the soil down with your hands. Nasturtiums require darkness to germinate. Planting too shallowly inhibits germination.
Water to moisten the soil to a depth of 3 to 4 inches and keep the soil moist until the seeds germinate in 7 to 14 days.