| General Description | Helianthus annuus 'Sonja' is a hardy annual sunflower with yellow-orange ray blooms. |
| Landscape | Makes a good specimen plant or en masse. Grow against a fence, shed, house or veranda for support and as a backdrop to other plants. |
| Propagation | By seed sown in February to May, germination takes 5 - 21 days. |
| Cultivation | Grow in full sun to part shade. Staking may be required for taller plants and/or heavy flower heads. |
| Pests | Possible problems include: caterpillars, beetles, leaf fungal spots, rust and powdery mildew. |
| Habitat | Horticultural origin. |
| Leaf Description | Alternate, medium-green. |
| Flower Description | Solitary, terminal, short ray petals are golden orange, centres are dark brown. Blooming from midsummer to early autumn. |
