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Sunflower Seeds, Double Sunking
Description
(Helianthus annuus). A super cheerful, fully double sunflower that is a top choice for arrangements! It reaches 6 feet tall with fluffy golden heads that are plush and soft. An extra-long vase life and lower pollen count make this a superb choice for cutting gardens and floral design.
- Annual
- 80-100 days to maturity
- 8-12 hours of full sun
- Sprouts in 7-14 days
- Seed Depth: 1/2"
- Plant Spacing: 18-24"
- Ideal Temperature: 65-75 F
- Frost Hardy: No
Growing Tips, Tricks and FAQs
Growing Tips
Double Sunking sunflowers are a tall variety that grows best in full sun and well-drainng soil. These sunflowers are fairly low-maintenance and drought-tolerant once established, but consistent watering during dry periods will enhance their growth and flower production. Avoid soggy soil, as this can cause root issues.
When to Grow
Sow the seeds directly outdoors after the last frost in spring, when soil temperatures are at least 50-60 F. You can also start the seeds indoors 2-3 weeks before the last frost and carefully transplant them once the seedlings are hardened off​.
How to Sow and Plant
Plant seeds about 1/2 inch deep and space them 18-24 inches apart. Make sure that the soil is well-prepared by loosening it and incorporating compost to improve drainage and fertility. If growing in rows, leave around 30 inches between rows to allow for good air circulation.
How to Grow
Double Sunking sunflowers will bloom within 80-100 days from planting. Regular watering is important, especially during hot weather, but avoid overwatering. Taller plants may require staking to support their heavy blooms, and adding mulch will help retain moisture and control weeds.
How to Save
- 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 in a cool, dark, dry place.
FAQ
How long do Double Sunking sunflowers take to mature?
It takes around 80-100 days depending on growing conditions​.
Can I grow Double Sunking sunflowers in containers?
It’s challenging to grow these sunflowers in containers due to their height. They are better suited for garden beds​.
Do Double Sunking sunflowers attract pollinators?
Yes, these sunflowers are excellent for attracting bees and butterflies.
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