Sunlight: Full sun
Maturity: 60-95 days from seed to flower
Height: 2 to 10 feet
Spacing: 4 to 12 inches apart in all directions
Home gardeners are growing sunflowers for their rich colors, large blooms and dazzling golden heads. Easy to plant from seed, they are available in sizes ranging from miniatures at 1 to 2 feet tall — good for edging — to over 10 feet tall with 2-foot diameter blooms.
Sunflowers germinate quickly and are fascinating and rewarding to grow. Best of all, they provide plenty of seeds to harvest at the end of the summer, making them the ideal plant for children. Plant this hardy annual once in your garden, and you’ll probably have volunteers the next year, thanks to dropped seeds and active birds.
Tired of the same old flowers? Heirloom flower seeds — the ones that Grandma used to grow — add charm to your garden while stirring memories with their abundant blossoms and arousing scents. Best of all, we ship them FREE!
- Choose from dwarf or giant varieties in an array of yellow, red and orange hues
- Direct seeding recommended once all danger of frost has passed
- Needs full sun with average to rich soil that can support strong roots
- After blooms have passed, let dry and save seeds or leave in garden to feed birds
- Rarely bothered by pests and diseases
Plant sunflowers in full sun and in rich soil on the north side of the garden so they won’t shade other plants (see Springtime Garden Soil Preparation). It is not recommended to plant sunflowers in sandy soil as they need a strong base to support their tall, top-heavy plants.
How to Plant
Sunflowers are very easy to direct-seed. Sow after all danger of frost has passed, about 4 to 12 inches apart with 1/2 inch of soil covering them.
After seeding outdoors, watch for squirrels and birds – they like to steal the freshly planted seeds to supplement their diet. If starting seeds indoors, use CowPots or pots made of newspaper that can be planted directly into the garden.
Once established and healthy, plants will continue growing easily even if left unattended (watch our video Flower Gardening from the Ground Up). Water to keep the soil slightly moist and provide support when plants begin to get top heavy. Leave mature flower heads on the plants to attract birds to your garden.
Consider planting in a circle to make a sunflower house for children or in a row to create a private, gorgeous sunflower hedge.
Insects and Disease
Insects and disease are not typically a problem for sunflowers.
Seed Saving Instructions
Separate sunflowers by 1/2 mile to ensure pure seed. Harvest the heads when they have completely filled out, have lost all of their petals, and the backs begin to turn brown. Allow to dry in a protected area and then shell by hand.