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