Sunflower Seeds – Black Giant

Grow dramatic Black Giant sunflowers from these premium-quality seeds. This heirloom variety is known for its tall, commanding height and deep dark blooms that create a bold focal point in any garden. Thriving in full sunlight and well-drained, nutrient-rich soil, Black Giant sunflowers are ideal for large garden beds, borders, and statement plantings. With strong germination and vigorous growth, these seeds produce sturdy plants with impressive seasonal blooms.

Features:

• High-quality Black Giant sunflower seeds for outdoor planting

• Produces tall plants with striking deep-toned blooms

• Ideal for large garden beds, borders, and showpiece plantings

• Thrives in full sun and fertile, well-drained soil

• Strong germination and vigorous seasonal growth

Specifications:

• Seed Type: Black Giant Sunflower (Helianthus annuus – tall specialty variety)

• Growth Habit: Tall upright annual

• USDA Zones: 3–10 (grown as a warm-season annual)

• Season for Sowing: Spring to early summer (February–June)

• Germination Time: 7–14 days in warm soil

• Sunlight Requirement: Full sun

• Soil Requirements: Loamy, nutrient-rich, well-drained soil

• Watering Needs: Moderate; water regularly but avoid waterlogging

• Support Needed: May require staking due to tall height

• Bloom Time: Summer through early fall