Helianthus delibes 'Uniflorus Giganteus' – Giant sunflower for borders and cut flowers

Helianthus delibes 'Uniflorus Giganteus' is an impressive annual sunflower that produces enormous, single flowers, adding a spectacular summer accent to gardens, borders, and cutting gardens. This variety is known for its exceptional height, large flower heads, and robust stems, making it ideal for cut flowers, ornamental plantings, and cutting gardens.

Thanks to its easy-to-grow nature and strong structure, 'Uniflorus Giganteus' is perfect for gardeners, hobby growers and florists looking for a dramatic and eye-catching effect in the garden.

Characteristics of Helianthus delibes 'Uniflorus Giganteus'

Key Features:

• Single, large flowers – an impressive flower head that can grow up to 25–30 cm across

• Very tall stems – makes the plant excellent for cut flowers and as an eye-catcher in borders

• Prolific flowering – multiple flowers per plant for a spectacular summer display

• Pollen-rich flowers – attract bees, butterflies and other pollinators

• Robust, strong stems – resistant to wind and rain

• Fast growing annual – easy to grow for beginners and experienced gardeners alike

'Uniflorus Giganteus' combines ornamental value, height, and ecological benefits, making it a versatile choice for gardens and cutting gardens.

Uses and applications

Helianthus delibes 'Uniflorus Giganteus' is suitable for various applications:

• Cut flowers – large flowers and sturdy stems are perfect for bouquets and flower arrangements

• Borders and flowerbeds – adds height and striking colour accents to summer borders

• Pick-a-Pick Gardens – ideal for hobby gardeners who want to harvest long-lasting, decorative flowers

• Bee-friendly gardens – flowers attract pollinators and support biodiversity

Its enormous size and single flower shape make this sunflower ideal for combining with smaller sunflowers, asters, or lavender, creating a spectacular contrast and layered garden look.

Growth habit and care

Helianthus delibes 'Uniflorus Giganteus' is a sun-loving annual plant that grows best in full sun and well-drained, fertile soil.

Care tips

• Sow indoors before the last frost or directly outdoors after the last frost

• Planting distance: 60–80 cm to give the enormous plants space

• Support is often recommended due to the height of the stems

• Regular watering and fertilizing promotes healthy growth and large flowers

• Remove wilted flowers to encourage new blooms

With the right care, 'Uniflorus Giganteus' will provide an impressive summer display from July to September.

Features at a glance

• Latin name: Helianthus delibes 'Uniflorus Giganteus'

• Type: Annual sunflower

• Color: Yellow with dark heart

• Flower shape: Single, large daisy-like flower

• Plant structure: Very tall, robust stems

• Flowering: Summer to early autumn

• Location: Full sun

• Soil: Well-drained, nutritious

• Application: Cut flowers, borders, cutting gardens, bee-friendly gardens

• Ecological: Pollen-rich flowers, attractive to pollinators

Why choose Helianthus delibes 'Uniflorus Giganteus'?

• Huge, single blooms for a spectacular garden accent

• Very tall, robust stems suitable for cut flowers

• Richly flowering and fast growing

• Pollen-rich flowers attract bees and other pollinators

• Perfect for borders, cutting gardens and striking summer plantings

Helianthus delibes 'Uniflorus Giganteus' is an excellent choice for gardeners and florists who want to harvest and use large, showy, and bee-friendly sunflowers.