Sunflower Pro-Cut Brilliance seeds - Helianthus annuus
Sunflower Pro-Cut Brilliance seeds - Helianthus annuus
Helianthus annuus 'Pro-Cut Brilliance'
Sunflower
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Description
Le tournesol Pro-Cut F1 ‘Brilliance’ est une sélection d'Helianthus annuus destiné aux professionnels de la fleur coupée. Ce cultivar ne forme qu'une seule tige qui porte une grande fleur sans pollen, bicolore, jaune et orangé autour d’un centre brun. On l'utilise aussi dans les massifs d'été, au potager fleuri, ou dans de grands pots profonds. Indifférent à la longueur du jour, ce cultivar permet des semis échelonnés durant toute la belle saison.
De la famille des Asteracées, Helianthus annuus n'est autre que le Tournesol. Cette espèce botanique, domestiquée de longue date par les peuples autochtones, est originaire d’Amérique du Nord. Le nom de genre vient du grec hēlios (soleil) et ánthos (fleur), tandis que l’épithète annuus rappelle le cycle annuel de la plante.
‘Pro-Cut Brilliance’ appartient série professionnelle Pro-Cut, développée pour la production de fleurs coupées par le généticien américain Tom Heaton (NuFlowers / Sunflower Selections) ; il s’agit d’un hybride F1. La plante adopte un port nettement érigé et montre une croissance très rapide ; en pleine terre, elle s'élève entre 1,20 et 1,80 m, sa largeur correspondant à la seule tige principale. En pot, sa hauteur diminue proportionnellement au volume de substrat : dans un contenant profond (40–60 cm), on obtient des tiges plus courtes, mais bien calibrées pour la coupe.
L’inflorescence est un grand capitule terminal de 8 à 12 cm de diamètre, composé d’un disque central brun à brun pourpré formé de fleurons tubulés fertiles, entouré de ligules stériles jaune doré se réchauffant vers l’orangé à la base. La floraison commence 50 à 60 jours après le semis ; elle s’étale de juillet à septembre selon la date de semis.
Le feuillage se compose de grandes feuilles ovales à triangulaires, souvent cordées, à marge grossièrement dentée, au limbe rugueux et à la nervation bien marquée ; les tiges, épaisses et pubescentes, portent une sorte de collerette de bractées lancéolées rudes au toucher. Le système racinaire est dominé par un pivot puissant pouvant descendre à 1 m ou 1,50 m, accompagné d’un chevelu latéral concentré dans les premiers horizons du sol ; la plante résiste à une sécheresse passagère et demande un sol profond, meuble et bien drainé.
‘Brilliance’ se plante facilement en lignes au potager ; espacez les plants pour obtenir des tiges plus longues et semez par vagues toutes les deux à trois semaines pour allonger la période de floraison. Tuteurez en situation ventée. Composez de beaux bouquets d’été avec l’Amaranthe Queue de Renard Verte. En massif, mariez-le des plantes d'architecture : le ricin Ricin commun ‘Carmencita’ pour son volume et son feuillage bronze, le grand tabac d’ornement Nicotiana sylvestris pour son parfum vespéral et une graminée comme le Panicum virgatum ‘Heavy Metal’ pour son feuillage coloris bleuté. Pour varier les nuances au jardin comme en vase, mélangez différentes variétés de tournesols : ‘ProCut White Nite’ pour ses fleurs ivoire, ‘Sunrich Lemon’ jaune clair, et ‘Claret’ pour des rouges plus sombres.
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. Changez l’eau du vase, chaque jour.
Le Tournesol occupe une place de choix dans l’histoire agricole nord-américaine : plante vivrière polyvalente (graines, huile, teinture), il a été érigé en fleur emblématique de l’État du Kansas dès le début du XXᵉ siècle, témoignage de son importance culturelle et paysagère dans les Grandes Plaines.
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Flowering
Foliage
Plant habit
Botanical data
Helianthus
annuus
'Pro-Cut Brilliance'
Asteraceae
Sunflower
Helianthus annuus Pro-Cut® F1 Brilliance
Cultivar or hybrid
Planting and care
The Sunflower 'Pro-Cut F1 Brilliance' can be sown:
Either in March-April, in pots under cover, to prepare young plants that can be placed 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 the 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).
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.
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