Sunflower
Sunflower Detailed Encyclopedia Introduction
Sunflower symbolizes sunshine and hope, with large flower heads that follow the sun, a representative flower of summer.
Basic Info
Family：Asteraceae
Scientific Name：Helianthus annuus
Origin：North America
Flowering Period：Summer to autumn
Height：1-4 meters
Lifespan：Annual
Morphology
Leaves：Heart-shaped leaves, rough
Flowers：Large flower heads, yellow petals
Roots：Deep root system
Stem：Thick erect stem
Growth Habits
Soil Requirements：Fertile sandy soil
Watering Needs：Keep soil moist
Light Requirements：Requires ample sunlight
Temperature Requirements：20-30°C
Classification & Varieties
Main Classifications
Ornamental Varieties
Professional Care
✂️ Pruning Management
Pruning Timing：No pruning needed
Pruning Method：Natural growth
Pruning Purpose：Maintain natural form
Required Tools：No tools needed
🛡️ Pest & Disease Management
Common Pests：
Common Diseases：
Prevention Measures：Maintain ventilation, avoid dense planting
Treatment Methods：Use organic pesticides
🌱 Fertilization Management
Fertilizer Type：NPK compound fertilizer
Fertilization Frequency：Once a month during growing season
Fertilization Timing：Spring to summer
Fertilization Amount：50-100g per plant
💧 Water Requirements
Watering Frequency：Daily
Watering Amount：Keep soil moist
Watering Method：Water at roots
Dehydration Signs：Wilting leaves
Basic Care Tips
- •Requires ample direct sunlight
- •Keep soil consistently moist
- •Fertilize regularly to promote growth
- •Provide support to prevent lodging
- •Watch out for birds and pests
Ecology Value
Pollinators：Bees, butterflies
Wildlife：Provides seeds for birds
Environmental Value：Purifies soil, beautifies environment
Cultural Symbolism
Symbolic Meaning：Sunshine, hope, loyalty
Historical Background：Important crop of Native Americans
Related Festivals：Sunflower Festival
Artistic Expression：Classic theme in Impressionist painting