Nasturtium Seeds,
Baby Orange

Nasturtiums grow best when directly sown outdoors in the spring after the danger of frost has passed, once soil temperatures reach at least 55 F. For earlier blooms, seeds can be started indoors 4 weeks before the last frost date and transplanted carefully after hardening off. Check your local region's last frost dates to determine the best planting time. To better understand frost dates in your area, read our blog post, 'Our Experts Answer Questions, Share Resources'.

Nasturtiums are best direct-sown outdoors. Plant seeds 1/2-1 inch deep and space them 8–12 inches apart. To speed up germination, soak seeds in warm water overnight before sowing. If starting indoors, use biodegradable pots to minimize root disturbance during transplanting. Place the seeds in a sunny window or under grow lights until they are ready to be hardened off.

Water sparingly, when the soil feels dry, as they prefer dry to moderately moist conditions. Overwatering can cause root rot or excessive foliage growth at the expense of flowers. Do not fertilize nasturtiums, as they thrive in lean soil. If growing in containers, ensure proper drainage to avoid waterlogging the soil. Deadhead spent flowers to encourage continuous blooming throughout the season.

• 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.