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Sunflower Zebulon Seeds - Helianthus annuus

Helianthus annuus Zebulon
Sunflower

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Helianthus annuus 'Zebulon' is a stunning semi-dwarf variety that produces large yellow flowers with beautiful, geometrical green centres. It flowers early and abundantly on long, sparsely branched stems, perfect for cutting! Sunflowers are popular annuals that are generally direct sown in spring in ordinary, well-drained garden soil.
Flower size
15 cm
Height at maturity
70 cm
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 annuus 'Zebulon' is a stunning semi-dwarf variety that produces large yellow flowers with beautiful, geometrical green centres. It flowers early and abundantly on long, sparsely branched stems, perfect for cutting! Sunflowers are popular annuals that are generally direct sown in spring in ordinary, well-drained garden soil.

The Sunflower, or Helianthus annuus in latin, is a large annual plant belonging to the Asteraceae family, native to the Americas. It has long been domesticated for its edible seeds and is now cultivated on a large scale for its oil. 'Zebulon' is a semi-dwarf ornamental selection which grows to a height of about 70 cm in the space of 2-3 months. It produces single flowerheads (capitulum) that measure approximately 15 cm across. The external petals (technically, ray flowers) are golden yellow. They surround an amazing green to yellow central disc, made up of tiny disc flowers arranged in a complex geometrical pattern known as Fermat’s spiral. They gradually turn brown as they age. The flowering period lasts from early July to September. In ideal growing conditions, flowers appear 60 days after sowing. The floral stems are strong and straight, covered in simple, alternate to opposite heart-shaped green leaves. They are carried on a fairly long petiole and are rough to the touch. For seed production, grow alongside another non-sterile cultivar.

This easy-to-grow plant, with its large seeds and tidy habit, 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, well-drained soil. Its flowers make very cheery arrangements combined with fern leaves, Solidago, 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 September
Inflorescence Flower head
Flower size 15 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 70 cm
Spread at maturity 30 cm
Growth rate very fast

Botanical data

Genus

Helianthus

Species

annuus

Cultivar

Zebulon

Family

Asteraceae

Other common names

Sunflower

Origin

Cultivar or hybrid

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Planting and care

Semez le Tournesol Zebulon de mars à mai en pots. Utilisez un terreau de bonne qualité que vous tamiserez en surface pour bien lier la graine à son substrat. Avant  de semer, tassez légèrement le terreau à l’aide d’une planchette. Semez vos graines à la volée. Recouvrez les graines en saupoudrant du terreau au dessus ou de la vermiculite, tassez légèrement et arrosez copieusement en pluie fine. Placez vos pots à la lumière, sans soleil direct, à une température de 20°c à 25°c. Baissez la température la nuit jusqu’à 17°c afin de créer une alternance bénéfique à la germination.

La levée des graines prendra de 21 jours. Maintenez le terreau humide mais sans excès durant la croissance. 15 jours avant leur mise en place définitive, commencez à les acclimater progressivement jusqu’à une température de 15°c.

Fin mai début juin (ou plus tôt selon les régions) la température sera suffisamment chaude au jardin pour y installer vos jeunes plantes. Choisissez un emplacement largement ensoleillé. Ajoutez une bonne pelletée de compost à chaque trou de plantation. Espacez vos plantes de 45 à 60 cm.

Les semis effectués en mai peuvent être réalisés directement en place. En échelonnant vos semis vous prolongerez la floraison jusqu’en automne.

Protégez vos semis des attaques des escargots et des limaces qui sont friands de ces jeunes plantes. En semant de la ciboulette à proximité de vos tournesols vous éloignerez les pucerons qui seraient tentés de s’y installer.

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 Border, Vegetable garden
Ease of cultivation Amateur
Exposure Sun
Soil pH Any
Soil moisture Moist soil, drainant, riche

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