Botanical Name: Helianthus annuus
Native: North America
Plant Dimensions: 24–36" tall, 12"–24" wide
Variety Information: 3"–5" double, golden-yellow flowers resemble huge chrysanthemums.
Exposure: Full sun
Bloom Period: Summer to frost
Attributes: Attracts Pollinators, Cut Flower, Drought Tolerant, Good for Containers, Heat Tolerant
When to Sow Outside: RECOMMENDED. 1 to 2 weeks after your average last frost date.
When to Start Inside: 2 to 4 weeks before your average last frost date. Sunflowers are senstive to root disturbance; sow in biodegradable pots that can be planted directly in the ground.
Days to Emerge: 10–15 days
Seed Depth: ¼"–½"
Seed Spacing: A group of 3 seeds every 6"–9"
Thinning: When 2" tall, thin to 1 every 6"–9"
Harvesting: For longest vase life, harvest flowers in the morning and choose flowers that have just a few petals lifting off the central disk.