Sunflower Seeds – Double Tall (SUMMER)

Sunflower Double Tall develops into a tall, sturdy plant carrying distinctive double, densely petalled yellow flower heads. Its height and bold flowers make it especially suitable for background planting and dramatic summer displays.

Key Features

• Botanical name: Helianthus annuus

• Type: Double Tall Sunflower

• Annual flowering plant

• Large double flowers

• Dense golden-yellow petals

• Tall upright growth

• Strong stems

• Bold ornamental appearance

• Fast growing

• Full sun

• Heat tolerant

• Excellent for back borders

• Suitable for landscape planting

• Excellent cut flower

• Suitable for large grow bags

• Attractive to pollinators

• SUMMER flowering plant

Recommended Grow Bags

G-20F Grow Bag – 20 × 16 inch

Recommended for growing one tall sunflower plant with sufficient root space and stability.

G-24F Grow Bag – 24 × 18 inch

Excellent for larger plants where extra soil volume and stability are preferred.

Recommended Soil / Potting Mix

Use:

50% Bhalu Mitti / Garden Soil + 30% GREEN GARDENS Vermicompost + 20% Cocopeat

Use a fertile, loose and well-draining growing medium.

Avoid compact soil and waterlogging.

Growing Instructions from Seeds

Sunflowers perform best when direct sown in their final position.

Sow seeds approximately:

2–3 cm deep

Keep the soil evenly moist until germination.

After emergence, retain the strongest seedlings and avoid unnecessary root disturbance.

Germination

7–14 days

For best results:

• Maintain warm temperatures

• Keep soil lightly moist

• Provide good drainage

• Avoid overwatering

• Provide strong sunlight after emergence

Plant Spacing

Maintain approximately:

45–60 cm / 18–24 inches between plants

to allow sufficient room for tall growth and large flower heads.

Sunlight

Provide:

Full sun — preferably 6–8 hours or more of direct sunlight daily.

Watering

Water regularly while seedlings establish.

Once plants are growing strongly, water deeply when the upper soil begins to dry.

Avoid continuous waterlogging.

Growth & Flowering

Double Tall Sunflowers develop a tall, strong and upright growth habit with impressive densely petalled blooms.

Their double flowers have a fuller appearance than traditional single sunflowers and create a striking focal point in summer gardens.

Tall plants may benefit from staking or wind protection, particularly on exposed rooftops and open sites.

Feeding

Mix GREEN GARDENS Vermicompost into the soil before sowing.

Moderate feeding during active growth supports strong stems and good flowering.

Avoid excessive nitrogen fertilizer.

Related Products

• G-24F Grow Bag – 24 × 18 inch

• GREEN GARDENS Vermicompost

• Summer Flower Seeds

• Growing Guide Videos – Gardening with Javed Iqbal