Nasturtium Seeds,
Alaska Mix

Nasturtiums should be planted outdoors after the danger of frost has passed, as they are frost-sensitive. Consult your local area's last frost date to determine when to plant. Seeds can also be sown indoors 4 weeks before the last frost date, though direct sowing is often preferred due to their sensitivity to transplanting. In warmer climates (zones 9-11), nasturtiums can be grown as a winter annual or almost year-round. Learn more about your region's frost dates by checking out our blog post, 'Our Experts Answer Questions, Share Resources'.

Nasturtiums are best direct-sown in the garden. Soak the seeds in warm water overnight before planting to soften the hard seed coat and improve germination rates. Sow seeds 1/2-1 inch deep and space them 8-12 inches apart. They germinate in about 7-14 days. If starting indoors, use biodegradable pots to avoid root disturbance during transplanting. Thin seedlings to maintain proper airflow and space for growth.

Nasturtiums grow well in a variety of settings, from garden beds to containers and trellises. Ensure they receive 6-8 hours of full sun daily for the best blooms, though they can tolerate partial shade. Water them deeply once a week, and more frequently during hot or dry conditions, but avoid waterlogging the soil. Fertilization is unnecessary, as rich soil reduces flowering. Deadhead flowers regularly to encourage continuous blooming.

• 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.