Helianthus 
Flora Frost Helianthus annuus 'Sonja'
| Leaf tip | Pointed/acute |
| Leaf margin | Erose |
| Flower scent | Unscented |
| Leaf type | Foliage leaf |
| Flower color | Yellow-medium yellow orange-021A |
| Soil fertility | Special demands |
| Leaf, general shape | Ovate (egg-shaped) |
| Inflorescence | Capitulum (head) |
| soil pH requirement | Alkaline (pH > 7,5); Neutral (pH 6,5 - 7,5) |
| Leaf division | Simple |
| Plant, growth type | Erect |
The Helianthus annuus 'Sonja', commonly known as the sunflower, is a vibrant and attractive plant that belongs to the sunflower family. This particular sunflower variety is characterized by its pointed or acute leaf tips and erose leaf margins. The leaves themselves are ovate in shape, resembling an egg.
When it comes to its inflorescence, the 'Sonja' sunflower produces striking and beautiful yellow flowers. The flower color can range from medium yellow to orange-021A, creating a stunning display in any garden or landscape. Interestingly, this sunflower variety does not possess any scent, making it ideal for individuals who may be sensitive to strong floral fragrances.
In terms of soil fertility, the Helianthus annuus 'Sonja' has special demands. It requires a soil pH level that is either alkaline with a pH greater than 7.5 or neutral with a pH ranging from 6.5 to 7.5. It is important to ensure that the soil meets these specific requirements to promote healthy growth and vibrant flowers.
The growth type of this sunflower variety is erect, meaning it grows tall and straight. This makes it an excellent addition to any garden or landscape as it adds vertical interest and visual appeal. The plant's overall growth pattern is sturdy and strong, providing a stable foundation for the sunflower to flourish.
Caring for the Helianthus annuus 'Sonja' sunflower is relatively straightforward. It prefers full sun exposure, as its name suggests, and requires regular watering to keep the soil moist but not waterlogged. It is also essential to provide adequate spacing between plants to ensure proper air circulation and prevent the risk of diseases.
As with most sunflowers, the 'Sonja' variety is often grown for its ornamental value. It can be a fantastic addition to a flower bed, border, or as a focal point in a larger garden design. Its vibrant yellow flowers attract bees, butterflies, and other pollinators, making it a valuable asset for supporting local ecosystems.
In conclusion, the Helianthus annuus 'Sonja' sunflower is a stunning plant with unique characteristics. From its pointed leaf tips and erose leaf margins to its ovate leaves and erect growth type, this sunflower variety is sure to add beauty and charm to any garden or landscape. With its vibrant yellow flowers and special soil fertility requirements, it is a plant that will attract attention and bring joy to both humans and pollinators alike.
Market availability index by month:
| Jan. | Feb. | Mar. | Apr. | May | Jun. | Jul. | Aug. | Sep. | Oct. | Nov. | Dec. |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | 1 | 1 | 2 | 3 | 3 | 3 | 4 | 3 | 2 | 1 | 1 |