Shasta County with with mountains on the northern, eastern, and western sides at the northern end of the narrowing Central Valley. The marjoity of the county is mountainous with some areas that are flat. Elevations ranging from 430 feet at Anderson to 10,027 feet at Lassen Park in the southeast area. The majority of Shasta's 161,700 person population live along a 20-mile stretch of urbanization along Interstate 5.

Redding enjoys the four seasons, with mild winters and warm summers. The prevailing winds blow north/south and rarely exceed 13 miles per hour. The average rainfall is 38 inches annually, occurring in the late fall and winter. Clear weather predominates over 300 days a year. Air quality is rated one of the best on the west coast.

By and large, Gerety's Landscape services regions which fall into the Sunset Western Climate Zone 7 and Zone 8.

Zone 7 covers much of Northern California and Oregon’s Rogue River valley. While the summers are mild and ideal for many crops and gardens, the growing season is shorter than in neighboring Zones 8 and 9. The winter is also somewhat colder, making this an excellent climate to grow plants that need some winter chill to thrive, such as peonies and flowering cherries. The region is noted for its pears, apples, peaches, and cherries. Pests that bother fruit trees are a major consideration, and mulching against the cold is often necessary.

Zone 8. The center of the Central Valley is Zone 8, noted for its cold-air basins. The crops that thrive here are those needing some winter chill (similar to Zone 7). You’ll drive by miles of orchards that require the cooler winter to set fruit. You’ll also see many heat-loving plants, though mostly those that handle the cooler winters.