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Giant BIO Sunflower Seeds - Helianthus annuus

Helianthus annuus Géant
Sunflower

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Almost all the seeds have sprouted and are growing steadily.

Cathy, 21/05/2023

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This plant carries a 6 months recovery warranty

More information

An annual plant, giant and radiant, which develops a vertical stem that can exceed 3.50 m (11.5 ft) in height in one season. The main flowers, immense, with a diameter of 30-40 cm (11.8 - 15.7 in), are composed of a corolla of golden yellow petals surrounding the brown heart. They attract pollinating insects, then produce oil-rich seeds that feed birds at the end of the season. Stunning in the background of a flower bed, it also finds its place in the vegetable garden. Sunflowers like sunny exposures and rich, fresh soils.
Ease of cultivation
Amateur
Height at maturity
3.50 m
Spread at maturity
50 cm
Soil moisture
Moist soil
Germination time (days)
20 days
Sowing method
Direct sowing
Sowing period March to May
J
F
M
A
M
J
J
A
S
O
N
D
Flowering time July to September
J
F
M
A
M
J
J
A
S
O
N
D
Harvest time September to October
J
F
M
A
M
J
J
A
S
O
N
D

Description

The Helianthus annuus or Giant Sunflower is an oversized and truly radiant annual plant. It develops a vertical stem that can exceed 3.50 m (11.5 ft) in height in one season. In this selection, the heads or main flowers, immense, can measure 30 to 40 cm (15.7 in) in diameter. These inflorescences are composed of a golden yellow corolla surrounding a large brown center. They attract pollinating insects, then produce a multitude of oil-rich seeds that feed birds at the end of the season. Superb in the background of a flower bed, the sunflower also finds its place in the vegetable garden or near the chicken coop. It is child's play to sow and its cultivation presents no difficulty in the sun, in rich and fresh soil.

The Helianthus annuus is none other than the famous sunflower cultivated on a large scale for the oil extracted from its seeds. This large annual plant of the Asteraceae family, domesticated for a long time by humans, has a controversial origin, but it is native to the American continent.

The spectacular flowering of this giant sunflower extends from July to September. However, we advise you to stagger your sowings to enjoy beautiful and young flowers regularly and until autumn. The flower resembles a giant daisy. It is an inflorescence in a head composed of a corolla of yellow petals or ligules surrounding a central disc where a multitude of fertile florets are packed, which will produce seeds after pollination.
Under the best conditions, it takes 12 weeks between sowing and the start of flowering. The foliage is composed of medium green leaves, single, cordate (heart-shaped), alternate, sometimes opposite at the base. They are joined to the stem by a more or less long petiole and are rough to the touch. Before flowering, the plant optimizes its growth by following the sun's course. This phenomenon called heliotropism has given rise to some of its common names: Heliotrope, Sunflower, Sunflower, Garden Sun...

Its great ease of cultivation, its large seeds that are easy to germinate are very popular with children who are introduced to the joys of gardening. The Giant Sunflower is particularly suitable for ornamental purposes in large flower beds, but also for decorating chicken coops and vegetable gardens where it will attract many beneficial animals for the gardener. It only requires sun and soil that is not too dry to flourish with simplicity. It is a vegetable plant with a rustic appearance and, as such, it will fit well in the wilder areas of the garden, in the company of artichokes, cardoons, large thistles, sainfoin, perennial peas, Jerusalem artichokes... If the weight of the flower is not suitable for making classic bouquets, it is very suitable for decorating a large jar that can be placed on the terrace.

To enjoy your Sunflower bouquets for a longer time, follow these few tips:

  • Cut the flowers in the morning just after they have opened. Use a knife that has been cleaned beforehand.
  • Remove the leaves starting from the bottom, leaving only 2 or 3 leaves under the flower.
  • Change the water in the vase every day with fresh water.

Sunflower in the kitchen:

The buds, petals, and seeds are edible. Add a few petals to a green salad for the contrast of colors and their nutty taste. The green buds can be blanched, then sautéed in garlic butter. Their flavor is similar to that of Jerusalem artichokes. The flesh of the seed can be eaten raw or roasted.

An ecological asset:
Throughout the summer, the nectar-rich Sunflower flowers attract pollinating insects and butterflies to your garden. A good way to improve the ecosystem and promote fruit and vegetable production in your vegetable garden. 
The oil-rich seeds are particularly appreciated by birds (parrots, tits, doves, goldfinches, siskins, nuthatches, finches, etc.). At the end of flowering, harvest them to make some happy during the winter scarcity.

Harvest

Harvest time September to October
Type of vegetable Seed and pod vegetable
Vegetable colour grey
Size of vegetable Small
Interest Flavour, Nutritional value, Very productive

Plant habit

Height at maturity 3.50 m
Spread at maturity 50 cm
Growth rate very fast

Foliage

Foliage persistence Annual
Foliage colour dark green

Botanical data

Genus

Helianthus

Species

annuus

Cultivar

Géant

Family

Asteraceae

Other common names

Sunflower

Origin

North America

Annual / Perennial

Annual

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Planting and care

Sow the annual Giant Sunflower from March to May in pots. Use good quality soil that you will sift on the surface to bind the seed to its substrate. Before sowing, lightly press down the soil with a plank. Sow your seeds by broadcasting. Cover the seeds by sprinkling soil on top or vermiculite, lightly press down and water generously with a fine rain. Place your pots in light, without direct sunlight, at a temperature of 20°C to 25°C. Lower the temperature at night to 17°C to create a beneficial alternation for germination.

The seeds will take 21 days to germinate. Keep the soil moist but not excessive during growth. 15 days before their final planting, start gradually acclimating them to a temperature of 15°C.

By the end of May or early June (or earlier depending on the regions), the temperature will be warm enough in the garden to plant your young plants. Choose a sunny location. Add a good handful of compost to each planting hole. Space your plants 45 to 60 cm apart (23.6 in).

Sowings done in May can be done directly in place. By staggering your sowings, you will extend the flowering period until autumn.

Protect your seedlings from attacks by snails and slugs, which are fond of these young plants. By sowing chives near your sunflowers, you will deter aphids from settling there.

Seedlings

Sowing period March to May
Sowing method Direct sowing
Germination time (days) 20 days

Care

Soil moisture Wet
Disease resistance Good
Pruning No pruning necessary

Intended location

Type of use Back of border, Vegetable garden
Hardiness Hardy down to -15°C (USDA zone 7b) Show map
Ease of cultivation Amateur
Soil ordinary, deep, fertile.
Exposure Sun
Soil pH Any
Soil type Silty-loamy (rich and light), 130
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