

Sunflower Pro-Cut Horizon seeds - Helianthus annuus
Sunflower Pro-Cut Horizon seeds - Helianthus annuus
Helianthus annuus 'Pro-Cut Horizon'
Sunflower
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This plant carries a 6 months recovery warranty
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Description
Le Tournesol Pro-Cut® F1 ‘Horizon’ (Helianthus annuus) s'illustre par ses fleurs bien orientées vers le ciel, sans pollen, idéales pour les bouquets. Il fleurit rapidement, présente une très bonne homogénéité et offre de longues tiges solides. Ses fleurs affichent un coloris orange doré très chaud, autour d’un large disque brun. Indifférent à la longueur du jour, ce cultivar permet des semis échelonnés durant toute la belle saison. Vous pourrez cueillir ses fleurs de juillet à septembre-octobre.
L'Helianthus annuus Pro-Cut® F1 ‘Horizon’ appartient à la famille des Astéracées. Originaire d’Amérique du Nord, le tournesol sauvage occupe naturellement prairies, bords de chemins et friches sèches depuis le sud du Canada jusqu’au nord du Mexique.
‘Horizon’ est un hybride F1 de la série Pro-Cut®, un programme de sélection dédié à la fleur coupée, mis au point par le sélectionneur Tom Heaton. Ce cultivar se caractérise par une tige ramifiée à la base, mais qui développe une hampe florale principale unique.
La plante adopte un port érigé ; en pleine terre, elle atteint 1,50 à 1,80 m de haut pour 25 à 35 cm d’envergure. Dans un pot profond, elle se stabilise plutôt entre 80 et 120 cm. Les tiges, robustes et légèrement pubescentes, portent de grandes feuilles alternes, cordiformes à ovales, à bord denté, rugueuses au toucher. Le système racinaire est dominé par un pivot puissant, capable de descendre profondément en sol meuble et de résister à une sécheresse modérée.
L’inflorescence est un capitule de 10 à 15 cm de diamètre, porté bien droit, composé de ligules périphériques orange doré entourant un disque central brun sombre. La floraison a lieu de juillet à septembre, selon la date de semis et la température. La tenue en vase est excellente lorsque les têtes sont coupées au stade « début d’ouverture ».
Au jardin comme au potager, semez Pro-Cut® ‘Horizon’ en rangs, en plein soleil, sur un sol profond et drainé. Créez avec ses fleurs des dégradés de tons chauds dans des massifs d’été ou des bouquets champêtres. Vous pouvez l'associer à des cosmos Cosmos ‘Apricotta’, des amarantes ‘Velvet Curtains’ et une graminée fine comme Setaria italica ‘Red Jewel’. Dans le vase, associez ces quatre variétés à quelques feuillages frais (basilic Cannelle, eucalyptus).
Nos conseils bouquets :
Coupez les tiges le matin juste après l’ouverture des fleurs. Supprimez les feuilles en partant du bas pour ne conserver que 2 ou 3 feuilles sous la fleur. Chaque jour, changez l’eau du vase.
Seul grand oléagineux domestiqué en Amérique du Nord, le tournesol a été utilisé de longue date par les peuples autochtones pour ses graines et ses pigments ; son introduction en Europe a d’abord valu à la plante une place dans les jardins d’ornement avant que la sélection agronomique n’en fasse une culture majeure, tandis que les séries modernes comme Pro-Cut® ont redonné au genre une place de premier plan chez les fleuristes.
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Flowering
Foliage
Plant habit
Botanical data
Helianthus
annuus
'Pro-Cut Horizon'
Asteraceae
Sunflower
Helianthus annuus Pro-Cut® F1 'Horizon'
Cultivar or hybrid
Planting and care
The 'Pro-Cut F1 Horizon' sunflower can be sown:
Either in March-April, in pots under cover, to prepare young plants that can be planted in your borders after the last frosts.
Or from April to June, after the frosts, directly in position. In a sunny spot in your garden. To enjoy beautiful fresh flowers throughout the season, we recommend staggering your sowings as much as possible.
Sow your seeds in groups of 2 at a depth of 1 cm and spaced 50 cm apart. After 20 days, remove the weakest shoot to keep only one per location. The strong growth of the sunflower will require regular watering. When the plant has reached about 1.20 m, you can stop watering and let it make do with rainfall, even if it is scarce. Protect your sowings from snail and slug attacks, as they are fond of these young plants.
Sowing period
Intended location
Planting & care advice
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Hardiness is the lowest winter temperature a plant can endure without suffering serious damage or even dying. However, hardiness is affected by location (a sheltered area, such as a patio), protection (winter cover) and soil type (hardiness is improved by well-drained soil).
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The flowering period indicated on our website applies to countries and regions located in USDA zone 8 (France, the United Kingdom, Ireland, the Netherlands, etc.)
It will vary according to where you live:
- In zones 9 to 10 (Italy, Spain, Greece, etc.), flowering will occur about 2 to 4 weeks earlier.
- In zones 6 to 7 (Germany, Poland, Slovenia, and lower mountainous regions), flowering will be delayed by 2 to 3 weeks.
- In zone 5 (Central Europe, Scandinavia), blooming will be delayed by 3 to 5 weeks.
In temperate climates, pruning of spring-flowering shrubs (forsythia, spireas, etc.) should be done just after flowering.
Pruning of summer-flowering shrubs (Indian Lilac, Perovskia, etc.) can be done in winter or spring.
In cold regions as well as with frost-sensitive plants, avoid pruning too early when severe frosts may still occur.
The planting period indicated on our website applies to countries and regions located in USDA zone 8 (France, United Kingdom, Ireland, Netherlands).
It will vary according to where you live:
- In Mediterranean zones (Marseille, Madrid, Milan, etc.), autumn and winter are the best planting periods.
- In continental zones (Strasbourg, Munich, Vienna, etc.), delay planting by 2 to 3 weeks in spring and bring it forward by 2 to 4 weeks in autumn.
- In mountainous regions (the Alps, Pyrenees, Carpathians, etc.), it is best to plant in late spring (May-June) or late summer (August-September).
The harvesting period indicated on our website applies to countries and regions in USDA zone 8 (France, England, Ireland, the Netherlands).
In colder areas (Scandinavia, Poland, Austria...) fruit and vegetable harvests are likely to be delayed by 3-4 weeks.
In warmer areas (Italy, Spain, Greece, etc.), harvesting will probably take place earlier, depending on weather conditions.
The sowing periods indicated on our website apply to countries and regions within USDA Zone 8 (France, UK, Ireland, Netherlands).
In colder areas (Scandinavia, Poland, Austria...), delay any outdoor sowing by 3-4 weeks, or sow under glass.
In warmer climes (Italy, Spain, Greece, etc.), bring outdoor sowing forward by a few weeks.

















