Sequoiadendron giganteum / giant sequoia

Giant Sequoia tree and building at Sequoia National Park, California. Notice the building at the base of this massive tree.
Photo by Daniella Theoret
Giant sequoia bark. Great example of the deeply grooved bark of this species.
Photo by Daniella Theoret
Giant sequoia base -- an interesting example of a very old tree. The base of the tree has developed a deep crack in it.
Photo by Daniella Theoret
Sequoiadendron giganteum — a fairly old specimen with atypical structure on the grounds of San Francisco Botanical Garden, California, an ACS Reference Garden.
Photo by Sara Malone
Sequoia giganteum — a 1965 accession at the New York Botanical Garden, The Bronx, New York (USDA Hardiness Zone 7a). At one point the top was cut off for use as a holiday tree, and a lateral branch was then trained as the leader. Notice its stunted growth in a New York City climate. Based on climate data, this tree defies logic! Photo from 2020.
Photo by Katherine Wagner-Reiss


Fred Cain

My giant Sequoias are most definitely “climate change deniers”. I live in extreme northeastern Indiana which has historically been considered in hardiness zone 5a. In response to “global warming” and “climate change” our hardness zones have been shifted northward. The revised zones have now clearly put us within zone 6. However, my Sequoias do not agree. They have frozen out during hard winters. Zone 6 indicates average low temperatures between -10° and 0°F. The fact is that it continues to get colder here than that. Four years ago we had low temps of -20°F with wind. (The -20° was the outside ambient temperature and NOT the wind chill factor).

So, what my Sequoias are telling me is that we are not seeing much warming OR climate change here. Kinda makes you wonder.

However, some areas could warm more than others I suppose.

Fred M. Cain,
Topeka, IN

Eugene Salun

Hello, Fred!
How are your sequoias doing? I'm planning to plant Giant Sequoias in Lithuania, hardiness zone 6a. How old are your sequoias?

Fred Cain


Thanks for the response. My Sequoias just came through the winter in GREAT shape. Unfortunately, we have now had about four unusually mild winters in a row here so that their cold hardiness still hasn't really been tested.

I think they might do O.K. in Lithuania. Isn't that somewhat near the sea where you might get exposed to relatively mild air masses?

The climate where I live is closer to Moscow - perhaps not quite as cold as Moscow but almost as cold.

Good luck to you !
Fred M. Cain