Customer Service Hours
Mon-Fri 8-4 MST
Features
Family
Native
Life Cycle
Plant Height
Flower Color
Bloom Season
Further Information
Plant Characteristics
- Attracts Pollinators
- Edible Flower
Growing Conditions
About Mongolian Giant Sunflower Seeds
Helianthus annuus
Planting Sunflower
Plant Spacing
Light Required
Plant Height
Planting Depth
Planting Details
| Seed Depth | ¼" – ½" |
|---|---|
| Seed Spacing | A group of 3 seeds every 24" |
| Thinning | When 3" tall, thin to 1 every 24" |
| Germination | 10 – 15 Days |
| Start Indoors | 2 to 4 weeks before your average last frost date. Sunflowers are sensitive to root disturbance; sow in biodegradable pots that can be planted directly in the ground. |
| Direct Sow | RECOMMENDED. 1 to 2 weeks after your average last frost date. |
Find Your Frost Date & Grow Zone
Average First Frost Date
October 19
Average Last Frost Date
May 19
Your Hardiness Zone is
5b
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