Nasturtium Seeds,
Cherry Rose Jewel

Sow seeds outdoors in the spring after the last frost, as nasturtiums germinate best in warm soil between 55-65 F. For an earlier start, seeds can be started indoors about 4 weeks before the last frost date, then transplanted once the soil has warmed. In regions with mild winters, sow seeds in the fall for blooms during winter and early spring. Nasturtiums grow quickly and perform best when sown directly into the soil. Learn about your area’s hardiness zones and first/last frost dates in our blog post ‘Our Experts Answer Questions, Share Resources.

Sow seeds 1/2-1 inch deep and space them 8-12 inches apart. Choose a sunny location with well-draining soil. Soaking seeds in warm water overnight before planting helps soften the hard seed coat and speeds up germination. If starting seeds indoors, plant them in biodegradable pots to reduce root disturbance when transplanting.

Water sparingly once the plants are established, allowing the soil to dry slightly between waterings. Overwatering can lead to weak plants and fewer blooms. While deadheading is not necessary, removing spent flowers can encourage additional blooms. Nasturtiums are frost-tender annuals that bloom continuously from early summer to frost. They can tolerate poor soil and thrive in sandy or rocky conditions.

• Nasturtiums will often reseed, but to save seeds, allow the flowers to mature and let the petals fall to the ground.
• Collect the seeds from the plant before they fall.
• When the seeds are dry, label and store them in a cool, dark, dry place over the winter.