Sunflower Seeds – Big Size (SUMMER)

Big Size Sunflower develops a tall, sturdy plant with broad foliage and large yellow blooms. It is ideal where a bold vertical flowering display is required and performs particularly well when given ample sunlight, root space and regular watering.

Key Features

• Botanical name: Helianthus annuus

• Type: Big / Large Sunflower

• Annual flowering plant

• Large yellow flower heads

• Prominent dark centres

• Tall, upright growth

• Strong stems

• Fast growing

• Full sun

• Heat tolerant

• Excellent for back borders

• Suitable for landscape planting

• Good cut flower

• Suitable for large containers and grow bags

• Attractive to pollinators

• SUMMER flowering plant

Recommended Grow Bags

G-20F Grow Bag – 20 × 16 inch

Recommended for growing one large sunflower plant with adequate root space.

G-24F Grow Bag – 24 × 18 inch

Suitable where greater soil volume and stability are required for a tall plant.

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 continuous 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 provide sufficient spacing for proper root and stem development.

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 enough room for large plants and flower heads.

Sunlight

Provide:

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

Watering

Water regularly while plants are establishing.

Once established, water deeply when the upper soil begins to dry.

Large sunflowers require adequate moisture during rapid growth and flower development, but waterlogging should be avoided.

Growth & Flowering

Big Size Sunflowers develop a tall, strong and upright growth habit with large flower heads carried above broad green foliage.

Because plants can become tall and top-heavy, they should be grown in a sunny location protected from very strong winds.

Support or staking may be useful where plants are exposed to wind.

Feeding

Mix GREEN GARDENS Vermicompost into the soil before sowing.

Moderate feeding during active growth supports healthy stems and large flowers.

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