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Climate/Weather

 

The Bay Areas weather is similar to the semi-arid Mediterranean climate. Plants having deep root systems and/or leaves that retain water thrive here. Generally, once established, Mediterranean-type plants survive with little water and low humidity. The Plant List contains a majority of California native, or Mediterranean type plants. (To access the Plant List, return to the Main Menu.)

 

The following are useful weather facts and tips:

 

Cold air, like water, runs down hill (slope) to the lowest point and can be trapped by fences, walls, or structures, causing frost damage to plants.

 

South-facing walls and patios absorb heat during the day and radiate the heat at night, warming nearby plants.

 

Provide shade for west-facing windows with deciduous trees or trellises. A mature tree can reduce summer air-conditioning costs up to 40 percent.

 

Paved areas and air conditioners should be shaded to provide further energy savings.

 

A cold, dry, wind can damage unprotected plants causing stunted or slow growth. Create sheltered garden areas for protection regardless of wind direction.

 

Weather/climate terms:

 

Aspect: the direction a garden faces (north, south, east, or west).

 

Exposure: the direction of a garden with respect to weather. For example, the garden has a northern exposure if it is exposed to cold north wind with occasional frost.

 

Microclimate: a small area with uniform climate located within a larger area.  Hills, hollows, and structures can create microclimates.

 

See Sunset publication Smart Water and Energy Use in the West http://www.sunset.com/sunset/marketplace/article/0,20633,734248~894403~880159,00.html.