Caring for Redwoods
As its name implies, the Coast Redwood is a coastal species, native to the foggy, temperate regions of the far northern California coastline. This tree should be grown in areas where winter temperatures only occasionally drop below freezing. It loves misting, and thrives where it can receive a generous supply of water (although, like most plants, it cannot tolerate constantly water-logged soils and definitely enjoys the opportunity to dry out somewhat in-between waterings).
The Coast Redwood can withstand some cold temperatures, but will not tolerate prolonged periods of sub-freezing weather. In terms of heat, the Coast Redwood can withstand significant periods of hot weather provided enough water is available. In hot climates, partial shading and occasional misting is advised for the Coast Redwood. In regions with colder climates, the Coast Redwood may be successfully housed indoors temporarily for the cold season, or protected in the landscape through heavy mulching.
Caring for Sequoias
Despite its limited natural range, the Giant Sequoia is a highly adaptable species. It is both cold and heat hardy, and can grow almost anywhere in the United States. The two primary keys to success with the Giant Sequoia are:  a nice, sunny growing location; and  a watering cycle which allows the Giant Sequoia’s roots to dry out in between waterings.