Unwins Sunflower ‘American Giant’ F1 Seeds (12 Seeds)

Go big this summer with Unwins Sunflower ‘American Giant’ F1 — giant in name and giant in reality. This spectacular variety produces enormous yellow flower heads on towering plants that can grow up to 5 metres tall, making it an unforgettable feature in borders, wildlife gardens, and sunny garden corners.

Despite its impressive height, ‘American Giant’ is quick-growing with sturdy, strong stems, meaning it doesn’t need staking in most situations. Simply sow, plant out, water, feed, and watch it shoot skyward. It’s also a winner of the prestigious RHS Award of Garden Merit, as well as being pollinator-friendly, making it ideal for gardens that support bees and beneficial insects.

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Key Features

• Huge yellow flower heads on plants up to 5m tall

• F1 Hybrid – strong, vigorous growth

• Quick-growing and easy to establish

• Sturdy stems – generally no staking required

• RHS Award of Garden Merit winner

• Pollinator-friendly and ideal for wildlife gardens

• Prefers a full sun position

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Sowing & Flowering

Sowing Time: April – May
Flowering Time: July – October
Sow to Germination: 1–2 weeks
Sow to Flower: Approx. 3–5 months

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Technical Specification

• SKU: 30210446

• Pack Quantity: 12 seeds

• Colour: Yellow

• Plant Height: 5m

• Spread: 45cm

• Plant Spacing: 45cm

• Sowing Depth: 10–15mm

• Time to Germination: 1–2 weeks

• Time to Flower: 3–5 months

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Why choose Kean’s Claremorris

• Trusted local store with knowledgeable staff

• Quality seed varieties selected for Irish gardens

• Excellent seasonal selection for pollinator-friendly planting, garden colour, and cut flowers