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Sunflower Seeds, Taiyo
Description
(Helianthus annuus). An old Japanese variety grown for cut-flower use. Equally attractive in arrangements or in mass plantings in the garden. The tall, non-branching plants produce a single large flower in tones of yellow to orange, chocolate, and sable. Florists adore the 8- to 10-inch flowers!
- Annual
- 75-90 days to maturity
- 8-12 hours of full sun
- Sprouts in 7-14 days
- Seed Depth: 1/2"
- Plant Spacing: 18-24"
- Ideal Temperature: 60-75 F
- Frost Hardy: No
Growing Tips
The Taiyo sunflower t can grow between 6 to 7 feet tall and has sturdy stems. It grows best in rich, well-draining soil, moderate soil moisture, and full sun. Taiyo sunflower is better suited for garden beds rather than containers due to its height and space requirements.
When to Grow
Plant Taiyo sunflowers outdoors after the last spring frost, when soil temperatures reach at least 60 F. You can also start them indoors 2-3 weeks before the last frost, then carefully transplant them once conditions are warm and stable​.
How to Sow and Plant
Sow seeds directly into the soil about 1/2 inch deep and 18-24 inches apart to give them room to grow. Germination typically happens within 7-14 days if the soil is kept consistently moist. These sunflowers do not generally require staking, but it can be useful in windy areas due to their height.
How to Grow
Taiyo sunflowers need 8-12 hours of direct sunlight daily. Water regularly, particularly during dry periods, but be careful not to overwater to prevent root rot. A balanced, slow-release fertilizer applied at planting and mid-season can help support their growth. In rich soil, additional fertilization may not be necessary​.
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
Are Taiyo sunflowers good for pollinators?
Yes, Taiyo sunflowers are excellent for attracting bees, butterflies, and other insects, adding ecological value to your garden​.
Can Taiyo sunflowers be grown in containers?
Due to their height, they are best suited for garden beds, although they can grow in very large containers if needed.
Do Taiyo sunflowers need fertilization?
They generally do well with minimal fertilization. A single application at planting and another mid-season is sufficient, as over-fertilizing can lead to excessive leaf growth at the expense of blooms​.
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