For Empress of India Nasturtium, adjust seasonal care to the plant's actual growth cycle. Seed scarification helps germination. Soak seeds in warm water for up to 24 hours before planting. Sow seed indoors 2 to 4 weeks before last frost. Nasturtiums thrive in poor to average, slightly acidic, well-drained soil. 1/4 to 1/2 in 7 to 12 days (soaking and scarification recommended). Harvest when flowers are fully open. Leaves are also edible. Throughout the Garden (helps Almost Everything), Brassicas, Cucurbits, Beans, Potatoes. The packet contains 20 seeds. Read the packet directions before starting and keep the label so the variety remains clearly identified throughout the season. Prepare a clean, loose, well-drained growing medium and moisten it before placing the seeds so they are not displaced by the first watering. Keep the seedbed evenly moist without standing water because excess moisture reduces air around developing roots. Move seedlings into bright light as soon as they emerge and rotate containers regularly to encourage balanced growth. Where several seedlings compete for the same space, thin carefully and retain the strongest plants without disturbing their roots. Before outdoor planting, gradually acclimatize young plants to wind, sunlight, and changing temperatures over several days. Follow the stated spacing so air can move between plants and each plant receives adequate light, water, and nutrients. Water at soil level when the surface begins to dry, then adjust frequency for weather, drainage, and container volume. A light mulch can reduce splashing and moisture swings after the soil has warmed and plants are established.