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Helianthus debilis subsp. cucumerifolius - Cucumberleaf Sunflower Stella Seeds

Helianthus debilis subsp. cucumerifolius Stella
Cucumberleaf Sunflowe

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Cucumberleaf Sunflower 'Stella' features lots of beautiful golden yellow blooms on multi-branching, bushy plants. Ideal for brightening up sunny borders and summer bedding schemes. Cucumberleaf Sunflowers are pretty annuals that are generally direct sown in spring. They are particularly robust and tolerant poor and dry soil conditions.
Flower size
8 cm
Height at maturity
1.40 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 October
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Description

Cucumberleaf Sunflower 'Stella' features lots of beautiful golden yellow blooms on multi-branching, bushy plants. Ideal for brightening up sunny borders and summer bedding schemes. Cucumberleaf Sunflowers are pretty annuals that are generally direct sown in spring. They are particularly robust and tolerant poor and dry soil conditions.

Cucumberleaf Sunflower, or Helianthus debilis subsp. cucumerifolius in latin, is a short-lived, tender plant, often treated as an annual in colder climates. It belongs to the Asteraceae family and is native to the Atlantic coastal regions of North America. It has since spread to South Africa, Australia, Taïwan, Slovakia and Cuba. It occurs naturally in coastal regions, tolerating drought and poor, acidic, sandy soils as well as limestone. 'Stella' is a more compact, floriferous selection with a bushy, erect habit. It grows to a height of 140 cm in the space of 3 months. Each main stem is well-branched, producing numerous flowerheads (capitulum). Flowerheads measure approximately 8 cm across, made up of golden yellow petals (technically, ray flowers) arranged around a small brown central disc. The flowering period lasts from July to late September-early October. In ideal growing conditions, flowers appear 12 weeks after sowing. The dark green leaves are simple, alternate to opposite, varying in size and shape. They are rough to the touch. Flowers are followed by seeds.

This easy-to-grow plant, with its large seeds and cheerful disposition, is perfect for introducing children to gardening. It is particularly suited to sunny borders and summer bedding schemes. All it requires is a healthy dose of sunshine and moist to occasionally dry, well-drained soil. Its flowers make fabulous arrangements combined with fern leaves, goldenrod, statice and carnations for example.

Good to know: Before flowering, sunflowers famously optimize their growth by following the course of the sun in a phenomenon known as heliotropism. All summer long, sunflowers attract pollinating insects and butterflies into the garden, improving its ecosystem and encouraging fruit set in the orchard or vegetable patch. The oil-rich seeds are a favourite with garden birds (nuthatches, tits, finches, sparrows, blackbirds etc.). Harvest them after flowering to provide birds with a valuable food source during the cold winter months.

Cooking with sunflowers:

Sunflower buds, petals and seeds are all edible. Brighten up green salads with a few nutty-flavoured petals. The green buds have a Jerusalem artichoke taste when blanched and tossed in garlic butter. Unhulled seeds can be eaten both raw and grilled.

Flowering

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

Foliage

Foliage persistence Annual
Foliage colour dark green

Plant habit

Height at maturity 1.40 m
Spread at maturity 80 cm
Growth rate very fast

Botanical data

Genus

Helianthus

Species

debilis subsp. cucumerifolius

Cultivar

Stella

Family

Asteraceae

Other common names

Cucumberleaf Sunflowe

Origin

Cultivar or hybrid

Product reference859091

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Planting and care

Sow the Sunflower Stella from March to May in pots. Use a good quality potting soil that you will sieve on the surface to bind the seed to its substrate. Before sowing, lightly press the soil with a board. Sow your seeds by broadcasting. Cover the seeds by sprinkling soil on top or vermiculite, lightly press 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 placement, start gradually acclimating them to a temperature of 15°C.

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

Seeds sown in May can be directly sown in place. By staggering your sowings, you will extend the flowering until autumn.

Protect your seedlings from attacks by snails and slugs, which are fond of these young plants. By sowing chives nearby your sunflowers, you will keep aphids away from them.

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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, Hedge, Vegetable garden
Ease of cultivation Beginner
Exposure Sun
Soil pH Any
Soil moisture Dry soil, Moist soil, Ordinary but well-draining

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