Sunflower Seeds,
Evening Sun

Sow seeds directly outdoors after the last frost in spring, when the soil has warmed to at least 50 F, usually late spring to early summer. You can also start seeds indoors 2-3 weeks before the last frost, and carefully transplant them once the seedlings are hardened off. Timing is key, so be sure to check your local frost dates. If you’re not sure how to find your first and last frost dates, consult our blog post 'Our Experts Answer Questions, Share Resources.'

Sow seeds about 1/2 inch deep and space them 18-24 inches apart in well-prepared soil. Keep the soil moist until germination, which takes about 7-14 days. If planting in rows, make sure they have enough room to prevent overcrowding and to allow air circulation​.

Once established, Evening Sun sunflowers are relatively drought-tolerant, but they benefit from regular watering during dry spells. Taller plants may need staking to prevent them from toppling over, especially in windy conditions. Mulching around the plants will help retain soil moisture and keep weeds under control. These sunflowers will bloom from mid-summer to early fall.

• When petals die back and heads begin to dry and turn brown, place a paper bag over the heads to protect seeds from birds.
• After a few days, the heads will dry to a dark brown. Bring the heads indoors and hang them upside down in a dry area in direct sunlight for up to a week, shaking seeds free each day.
• Store seeds in a cool, dark, dry place.