29 Dec 2023

Helianthus annuus Sunblast

Leaf tip	Pointed/acute
Flower type	Single
Leaf margin	Serrate; Undulate
Winter hardness	Not hardy (USDA-zone 9,10,11)
Flower color	Yellow-dark yellow-013A
Soil fertility	Special demands
Leaf, general shape	Cordate (heart-shaped)
Flower diameter	9,5 - 10 cm
Plant height	30 - 40 cm; 70 - 80 cm; 60 - 70 cm
Inflorescence	Capitulum (head)
Flowering month(s)	May; June; July; August; September
Inflorescence/Flower arrangement	erect; obliquely erect
Leaf size	7,5 - 10 cm
soil pH requirement	Neutral (pH 6,5 - 7,5); Alkaline (pH > 7,5)
Leaf, main color	Dark green

Helianthus annuus Sunblast, also known as the Sunflower, is a beautiful and versatile plant that adds a pop of vibrant yellow to any garden or landscape. With its pointed or acute leaf tips and serrate, undulate leaf margins, this sunflower variety stands out from the rest.

Although it is not winter hardy in USDA zones 9, 10, and 11, Sunblast makes up for it with its stunning flower color. The petals range from a bright yellow to a dark yellow, with a shade designation of 013A. This variation in color adds depth and interest to the plant, making it a visual standout in any setting.

When it comes to soil fertility, Sunblast has special demands. It thrives in nutrient-rich soil, so proper care and attention should be given to ensure optimal growth. Additionally, the plant prefers a neutral to alkaline pH level, with a range of 6.5 to 7.5. This information is essential for gardeners looking to cultivate a thriving Sunblast sunflower.

In terms of size, Sunblast has a heart-shaped or cordate general leaf shape with a size range of 7.5 to 10 cm. The flower, with a diameter of 9.5 to 10 cm, sits atop a plant that can reach a height of 30 to 40 cm, 70 to 80 cm, or 60 to 70 cm, depending on the specific variety chosen. This versatility in height allows gardeners to select the perfect size for their space.

The inflorescence of Sunblast sunflowers is in the form of a capitulum or head. These flower heads are held erect or obliquely erect, adding a unique visual element to the plant. When it comes to flowering, Sunblast blooms from May to September, providing an extended period of enjoyment for both gardeners and pollinators.

In conclusion, Helianthus annuus Sunblast, commonly known as the Sunflower, is a stunning addition to any garden or landscape. With its pointed leaves, serrate, undulate margins, and heart-shaped appearance, this plant stands out from the crowd. Its bright yellow to dark yellow flowers bring a burst of color, while its special soil fertility demands and pH requirements ensure optimal growth. With a range of heights and a long flowering season, the Sunblast sunflower is a must-have for any garden enthusiast.

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