Sunflower Giant Single Seed

Sunflower Giant Single Seed - Irish Plants Direct

 

The Helianthus annuus commonly known as Giant Single Sunflower is a towering variety renowned for its enormous blooms and striking presence.

 

The Latin name Helianthus annuus translates to "annual sunflower," with "helios" meaning sun and "anthos" meaning flower, a nod to its sun-like golden blossoms. This classic sunflower variety is loved for its single, large flower heads that can reach up to 30 cm in diameter, making it a dramatic focal point in any garden.

 

Giant Single Sunflowers grow to an impressive height of 250-300 cm, thriving in well-drained, fertile soil with full sun. Blooming from mid-summer to early autumn, these sunflowers attract pollinators like bees and butterflies, and their seeds are a nutritious treat for birds.

 

Ideal for back borders, creating natural screens, or as a cheerful addition to children’s gardens.

 

Seed Qty: Approx. 50

 

Sow: March - May (indoors or outdoors)

Germination: 7 - 14 days

Soil: Well-drained, fertile soil; slightly acidic to neutral pH

Height: 250 - 300 cm

Flowering: July - September

Companion Plants: Cornflowers, Marigolds, Zinnias

Avoid Planting With: Potatoes, Fennel

 

Water deeply and regularly, particularly during dry spells, and stake plants to support their height and prevent wind damage.

 

Sowing Instructions

 

Indoors: Sow seeds in individual pots of moist, well-drained compost from March to April. Plant seeds 1-2 cm deep and keep at a temperature of 18-21°C. When seedlings are large enough to handle, harden off and transplant outdoors after the last frost, spacing them 45-60 cm apart.

 

Outdoors: Sow directly into prepared soil from April to May. Plant seeds 1-2 cm deep and keep moist until germination occurs. Thin seedlings to 45-60 cm apart to allow space for their large growth.

 

Giant Single Sunflowers are perfect for gardeners seeking an iconic, easy-to-grow plant that creates a bold statement in the garden. Their towering height and vibrant blooms make them a favourite for both ornamental displays and wildlife-friendly gardening.

 

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