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Sunflower Soluna Bronze seeds - Helianthus annuus

Helianthus annuus Soluna Bronze
Sunflower, Common Sunflower

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A disaster! No shoots at all!

Claire, 25/11/2024

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This plant carries a 6 months recovery warranty

More information

This medium-sized annual sunflower produces round flowers of 8 cm (3in), in a palette of yellow, bronze, and orange, adorned with a large dark centre. It flowers abundantly from June to September. A fast-growing, annual plant which is easy to sow and grow, perfect in the background of flowerbeds and as a cut flower.
Flower size
8 cm
Height at maturity
1.10 m
Exposure
Sun
Annual / Perennial
Annual
Germination time (days)
18 days
Sowing method
Direct sowing, Sowing under cover
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Sowing period March to May
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Flowering time July to September
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Description

Helianthus debilis 'Soluna Bronze' is an annual sunflower selection that produces abundant, modest-sized flowers in a rich palette of yellow to coppery-orange tones. Its flowers have a large dark centre and bloom in shimmering clusters throughout summer. This fast-growing variety is really easy to sow and grow in all types of well-drained soils. It is a good plant for wildflower beds and large flower borders.

'Soluna Bronze' is a very recent horticultural creation. This sunflower is part of a series of cultivars derived from Helianthus debilis selected for their unique colours and excellent branching. The botanical species H. debilis is an annual plant of the Asteraceae family native to the east coast of the United States. The 'Soluna Bronze' variety forms a branching clump that reaches an average height of 1.10 m (4ft) when in bloom, in just a few weeks. Flowering usually begins in July and can continue until September. It takes the form of 8 cm (3in) diameter flower heads, with ligulate petals around an almost black centre. The heads vary in colour from yellow to bronze and coppery-orange and bloom in clusters towards the top of the stems. The floral stems are purple, short, sturdy, and well-branched. The foliage consists of fairly dark green leaves, of varying shapes and sizes, that are simple, alternate, and sometimes opposite at the base.

Its ease of cultivation, large easy-to-germinate seeds, and reasonable size make it very popular with children who are starting gardening with sunflowers. 'Soluna Bronze' is particularly suited for the back of flower beds, but also for decorative use in the vegetable garden where it attracts many beneficial animals. It only needs sunlight and soil that is not too dry to flourish. It is a plant with a rustic appearance and, as such, it blends well in slightly wild areas of the garden, alongside cosmos, sainfoin, perennial sweet peas, scabious, blanket flowers...

Before flowering, the plant optimises its growth by following the path of the sun. This phenomenon is called heliotropism and has given rise to some of its common names: Heliotrope, Sunflower, Sunflower, Garden Sun...

An ecological asset:
Throughout summer, the nectar-rich flowers attract pollinating insects and butterflies. A good way to improve the ecosystem of your garden and promote the production of fruits and vegetables in your vegetable garden.
The oil-rich seeds are particularly appreciated by birds (Parrots, Tits, Goldfinches...). After flowering, harvest them to feed birds during the winter scarcity.

Flowering

Flower colour two-tone
Flowering time July to September
Inflorescence Flower head
Flower size 8 cm
Bee-friendly Attracts pollinators
Good for cut flowers Cut flower blooms

Foliage

Foliage persistence Annual
Foliage colour medium green

Plant habit

Height at maturity 1.10 m
Spread at maturity 45 cm
Growth rate very fast

Botanical data

Genus

Helianthus

Species

annuus

Cultivar

Soluna Bronze

Family

Asteraceae

Other common names

Sunflower, Common Sunflower

Origin

Cultivar or hybrid

Product reference20448

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Planting and care

Sow the Sunflower Soluna Bronze from March to May in pots. Use good quality potting soil sifted on the surface to bind the seed to its substrate. Before sowing, lightly press the soil with a board. Place 2 seeds 10 cm (4in) apart in each pot. Cover the seeds by sprinkling soil or vermiculite on top, lightly press down and water generously with a fine rose. Place your pots in light, without direct sunlight, at a temperature of 20°C (68°F) to 25°C (77°F). Lower the temperature at night to 17°C (62.6°F) to create a beneficial alternation for germination.

The seeds will take about 21 days to germinate. Keep the soil moist, but not excessively during growth. 15 days before their final placement, start gradually acclimatising them to a temperature of 15°C (59°F).

By the end of May or early June, the temperature in the garden will be warm enough to plant your young plants. Choose a sunny location. Add a good shovelful of compost to each planting hole. Space your plants 45 cm (18in) apart.

The seeds can be sown directly in May. By staggering your sowings, you can extend flowering until autumn.

Protect your seedlings from attacks by snails and slugs, which are fond of these young plants. Sowing chives nearby may keep aphids away.

 

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Sowing period

Sowing period March to May
Sowing method Direct sowing, Sowing under cover
Germination time (days) 18 days

Intended location

Suitable for Meadow
Type of use Back of border, Vegetable garden
Ease of cultivation Beginner
Exposure Sun
Soil pH Any
Soil moisture Moist soil, well-drained, rich
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