How to Grow Sunflower Autumn Beauty

Sunflower Autumn Beauty

Helianthus annuus 'Autumn Beauty'

flower

Autumn Beauty is a dwarf to medium-height sunflower variety featuring striking bicolor blooms with warm burgundy-red and golden-yellow petals. These cheerful flowers bloom prolifically throughout late summer and fall, producing multiple stems per plant that are ideal for cutting arrangements. The variety is relatively compact, making it suitable for borders, containers, and smaller garden spaces.

Growing Conditions

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Sun: Full sun, 6-8 hours daily minimum (8+ hours preferred for best blooms)

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Water: Moderate watering; keep soil consistently moist but not waterlogged. Water deeply 1-2 times weekly; reduce frequency once established. Drought-tolerant once mature.

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Spacing: 12 inches

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Days to maturity: 70-100 days to first bloom

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Planting depth: 1 inch

Soil

Type: Well-draining loamy soil

pH: 6.0-7.5

Amendments:

compost aged manure perlite for drainage

Growing Zones

Find your zone →

Thrives in zones 2-10; best performance in zones 3-9

2a 2b 3a 3b 4a 4b 5a 5b 6a 6b 7a 7b 8a 8b 9a 9b 10a

Growth Stages

Seedling

2-3 weeks

Thick cotyledons emerge, followed by true leaves. Stem is tender and green. Plant is low to ground.

Keep soil moist but not soggy. Provide bright light. Thin seedlings to proper spacing to prevent competition.

Vegetative Growth

3-4 weeks

Sturdy stem develops with increasing leaf surface area. Plant grows 12-36 inches tall depending on conditions. Leaves are broad and slightly hairy.

Water regularly and deeply. Stake taller plants if exposed to wind. Begin light fertilizing with balanced fertilizer every 2-3 weeks.

Bud Formation

2-3 weeks

Terminal bud appears at stem tip; flower bud becomes visible and swells. Plant reaches near-mature height.

Maintain consistent watering. Reduce nitrogen to encourage flowering over foliage. Support stems with stakes or cages as needed.

Flowering

4-6 weeks per bloom cycle

Flower head opens to reveal burgundy-red and golden-yellow bicolor petals. Multiple secondary flower heads often develop. Blooms are 3-5 inches across.

Deadhead spent flowers to encourage more blooms. Water at soil level to avoid wetting petals. Provide support for stem stability. Cut flowers last 1-2 weeks in vases.

Seed Development & Maturity

3-4 weeks

Petals drop, revealing disk florets that develop seeds. Seed head browns and fully matures.

Allow final flowers to mature if saving seeds; cover with netting to protect from birds. Stop deadheading. Let stems dry on plant before harvesting.

Companion Planting

Plan your garden →

Plant with:

zinnias cosmos marigolds beans corn cucumber zucchini liatris coneflowers

Avoid planting near:

potatoes brassicas (cabbage, broccoli) fennel dill tomatoes

Common Pests

Remove affected flowers and buds. Use Bt (Bacillus thuringiensis) spray. Encourage beneficial wasps and parasitic flies.
Increase humidity with water sprays. Use insecticidal soap. Remove heavily infested leaves.
Spray with water to dislodge. Use neem oil or insecticidal soap. Attract ladybugs and lacewings with nearby flowers.
Ensure good air circulation. Avoid overhead watering. Remove affected leaves. Apply fungicide if needed.
and
Remove by hand, especially at dawn. Use beer traps. Apply diatomaceous earth around base.
Cover seed heads with netting once mature. Harvest before birds strip all seeds.

Uses

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Sunflower seeds

Culinary

The mature seeds are nutritious and can be roasted and eaten as a snack or used in salads and baking. They are rich in vitamin E, selenium, and healthy fats. [source]

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Cut flower arrangements

Household

The striking bicolor blooms make excellent long-lasting cut flowers for bouquets and floral arrangements, bringing warm autumn tones to indoor displays. [source]

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Bird and pollinator food source

Wildlife

The flower attracts bees, butterflies, and other pollinators during bloom, and mature seeds provide valuable nutrition for finches, sparrows, and other seed-eating birds. [source]

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Dried flower crafts

Craft

Dried sunflower heads can be used in dried arrangements, wreaths, and other craft projects. The seed heads are particularly decorative. [source]

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Traditional herbal remedy

Medicinal

Sunflower petals and leaves have been used traditionally in herbal medicine for their antioxidant properties, though use should be validated with qualified herbalists. [source]

This is not medical advice. LizPlants is not a medical resource. Always consult a qualified healthcare professional before using plants medicinally.

Harvest Tips

Cut flowers for bouquets when the back of the flower head is yellow and outer petals are fully open; use a clean sharp knife and cut in early morning. For seeds, allow flowers to mature on the plant until fully brown and dry, then cut the entire head and hang upside down in a warm, dry location for 1-2 weeks before removing seeds by rubbing or brushing.

Fun Facts

🌱 Sunflowers are heliotropic when young, meaning their flower buds track the sun's movement across the sky from east to west during the day—this behavior helps warm the bud and attracts more pollinators.
🌱 The 'Autumn Beauty' bicolor variety is a relatively modern cultivar bred to extend the sunflower season into fall and provide striking color contrast not found in solid yellow types.
🌱 A single sunflower head can contain 1,000-2,000 individual florets that are actually tiny flowers themselves, each capable of developing into a seed.

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