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 doesnt need staking in most situations. Simply sow, plant out, water, feed, and watch it shoot skyward. Its 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.
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
Sowing Time: April May
Flowering Time: July October
Sow to Germination: 12 weeks
Sow to Flower: Approx. 35 months
SKU: 30210446
Pack Quantity: 12 seeds
Colour: Yellow
Plant Height: 5m
Spread: 45cm
Plant Spacing: 45cm
Sowing Depth: 1015mm
Time to Germination: 12 weeks
Time to Flower: 35 months
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
Free Delivery
Enjoy a discount on orders over $30.
100% Secure Payment
We ensure your money is
save
Customer Support 24/7
Instant access to
Support
Money-Back Guarantee
30 Days Money-Back
Guarantee