Chap 19. Horticultural Geography1. Climate2. Climatic Regions

Tropical and SubtropicalDry Climate (Arid, Semi-Arid)Temperature Zone

4. Distribution of Selected Fruit Crops5. Plant Hardiness Zones

Definition USDA Plant Hardiness Zone Map Arnold Arboretum Map Floradapt Map based on Minimum Temperatues

1. ClimateA. Climate if affected by:

a. Latitudeb. Circulation of atmosphere and ocean current

B. Components:a. Temperatureb. Moisture (Precipitation)c. Light

C. Microclimate:a. The climate of ‘small’ areab. Location vs. site:

- Location: geographic, climatic area- Site: microclimate within a location

D. Ecology:a. Study of life forms in relation to environmentb. Climate influences distribution of horticultural

crops and industry

2. Climatic Regions

A. Tropical RegionsB. Subtropical RegionsC. Dry ClimateD. MediterraneanE. Temperate ZoneF. Mountain (Tundra)

Climatic Zones of the World

A.Tropical and Subtropical Climatea. Hot and wet all year round

b. Low light under tree canopy

B. Dry Climatea. Arid regionsb. Semi-arid regions

Semi-Arid Climate - Low annual precipitation - Sonoran Desert of the Southwest

C. Mediterranean ClimateA. Climate: Mild winters

Dry hot summersB. Regions: Italy, Southern France, Spain

Coastal California

D. Temperate Zone Climate - Deciduous trees and shrubs - Distinctive four seasons

E. Mountain Climate (Tundra)- Very cold year round

USDA Plant Hardiness Zone Map

New USDA Plant Hardiness Map

Plant Hardiness Zone MapNorth Dakota and Region

Last Frost DatesBased on Average Frost Dates

Vegetation Map of the World

B. Subtropical Climate