Scientific Name:	Helianthus annuus cvs.
Pronunciation:	hee-lee-AN-thus ANN-you-uss
Common Name:	sunflower
Family Name:	Asteraceae
Plant Type:	Annual, Flowering cut plant, Flowering pot plant
Key ID Features:	Stems hairy; leaves broad, coarsely toothed; flower heads are often used to depict the sun.
Course(s):	HORT 1155, HORT 1193/1293, Level 4 Apprenticeship

Habit: Upright Form: Oval - vertical Texture: Coarse Mature Size: Height: 3 - 5m Spread: 1.5 - 2.0m Growth Rate: Fast Origin: Garden origin, North America Hardiness Rating: Zone 9: (-7 to -1 C) Exposure: Full sun Soil/ Growing Medium: Well-drained Water Use: Moderate Landscape Uses: Attract beneficial insects, Attract birds, Bedding plant, Container planting, Cut flower or foliage, Dried flower or fruit, Fall interest, Floristry, Herb, Medicinal plant, Perennial border, Summer interest, Wildlife food Additional Info: Google. Cultivars shown may include H. 'Big Smile'

Leaf Morphology: Glossary Form: Simple Arrangement: Alternate Texture/ Venation: Pinnate venation, Soft flexible Surfaces: Pubescent, Rugose Colour in Fall: Green-yellow Leaf(let) Terms: Shapes: Ovate Apices: Acute Bases: Obtuse Margins: Ciliate, Dentate

Inflorescence Type: Floriferous, Head (capitulum) Flower Morphology: Corolla Shape: Ligulate Colour (petals): Showy, White, Yellow, Orange, Red, Dark-red, (cv. 'Big Smile' is yellow) Flower Scent: None Flower Time at Peak: Jul, Aug, Sep, Oct Additional Info: Cultivar on left is Helianthus annus 'Big Smile'

Fruit Type: Achene Fruit Colour: Brown Fruiting Time: Oct, Nov Additional Info: Not showy, Edible

Bark or Stem Colour:     Organ Modifications: Storage tap root

Propagation:	Seed
Plant Care:
Maintenance:	Medium
Other:	Staking may be required for tall cultivars
Pest Susceptibility:	Fungal leaf spot, Rust, ( Disease resistant, Rabbit resistant, Drought resistant )
Specific Pests:	deer

Location(s): (GNH) GreeNHouse Location Map

Report an Error