2 inches
The giant sequoia given good conditions and good gardening techniques will put on growth rings of one inch per year. That would increase the trunk diameter by 2 inches per year. At that rate you could expect the tree to have a trunk diameter of 20 inches in its 10 th year, 60 inches in its 30 th year, 100 inches in its 50 th year, and 200 inches in its 100 th year. 200 inches is nearly 17 feet in trunk diameter. We expect 4 feet of upward growth in the third year for trees in large pots and one-inch plus growth rings. They have the potential to grow faster every year. Giant sequoias grow rapidly tall and less dense when the rising and setting sun is blocked. A The Giant redwood may grow 1 to 2 feet per year. The Coast redwood around 1.5 to 2.5 feet per year. The Dawn redwood around 1.5 to 2 feet per year, but not reaching as high or wide as the Giant or Coast.  1 The Giant Sequoia named The General Sherman Tree reigns supreme as the largest of the living things on earth. 2  This tree is so large that it's seemingly small growth rate of only one millimeter per year yields a volume of new wood equal to that of all the wood found in a 50 foot tree! 1 Since there is an average of 200 seeds per cone, 400,000 seeds could be released from each tree each year. 2  With an average of three mature trees per acre, over a million seeds are produced per acre per year in most Sequoia groves. 3  Giant Sequoias can provide food for themselves (and others). Rate of Growth. Coast redwoods may put on six, eight or even more feet of height in a single season whereas the giant sequoia is more likely to grow about two feet in height per year throughout its first fifty to one hundred years. Based on forty years of known growth, they calculated that the addition of new wood during this time was about forty cubic feet per year, or in other words approximately the same volume of wood as might be found in a tree twelve inches in diameter at breast height, and fifty feet high. In contrast, young open-grown giant sequoias taper markedly. The greatest known age of a giant sequoia is 3,200 years, determined from a stump count of rings (16). Calculations based on increment borings yield age estimates of 2,000 to 3,000 years for many living trees. Giant sequoia seeds are well adapted for wind dispersal. They are light (average 200,000/kg [91,000/lb]), winged, and fall in still air at a rate of 1.2 to 1.8 m (4 to 6 ft) per second. On the other hand, the massive trunk of the giant sequoia continues to grow-increasing its overall volume-at a rate far surpassing that of any other tree. Growth rings one half inch in thickness are common in young giant sequoias under optimal conditions. This amounts to an increase of one inch of diameter per year. And rapid growth is likely to continue even when the trunk has become one hundred or more feet in circumference. Based on forty years of known growth, they calculated that the addition of new wood during this time was about forty cubic feet per year, or in other words approximately the same volume of wood as might be found in a tree twelve inches in diameter at breast height, and fifty feet high. Giant sequoias are the world's largest single trees and largest living thing by volume. Giant sequoias grow to an average height of 50–85 m (164–279 ft) and 6–8 m (20–26 ft) in diameter. Record trees have been measured to be 94.8 m (311 ft) in height and over 17 m (56 ft) in diameter. The oldest known giant sequoia based on ring count is 3,500 years old. Giant Sequoias are among the oldest living things on Earth. Twenty-nine giant sequoias, measuring around 30 m (98 ft) in height, grow in Belgrade 's municipality of Lazarevac in Serbia. The oldest sequoiadendron in the Czech Republic, at 44 m (144 ft), grows in Ratměřice u Votic castle garden. 1 Giant Sequoias, like most other trees, grow as long as they live. 2  Although upward growth usually is completed within the first 800 years of life, Sequoias continue to grow thicker throughout their long lives. 3  Sequoias are extremely fruitful. 4  The average mature Giant Sequoia produces approximately 2,000 cones each year. 1 Since there is an average of 200 seeds per cone, 400,000 seeds could be released from each tree each year. 2  With an average of three mature trees per acre, over a million seeds are produced per acre per year in most Sequoia groves. 3  Giant Sequoias can provide food for themselves (and others). 1 The average mature Giant Sequoia produces approximately 2,000 cones each year. 2  Since there is an average of 200 seeds per cone, 400,000 seeds could be released from each tree each year. 3  With an average of three mature trees per acre, over a million seeds are produced per acre per year in most Sequoia groves. 1 Since there is an average of 200 seeds per cone, 400,000 seeds could be released from each tree each year. 2  With an average of three mature trees per acre, over a million seeds are produced per acre per year in most Sequoia groves. 3  Giant Sequoias can provide food for themselves (and others). The giant sequoia is the fastest growing conifer on earth given the right conditions. We expect 4 feet of upward growth in the third year for trees in large pots and one-inch plus growth rings. They have the potential to grow faster every year. Giant sequoias grow rapidly tall and less dense when the rising and setting sun is blocked.
http://www.giant-sequoia.com/faqs/giant-sequoia-landscape-questions/ http://www.redwoodworld.co.uk/faqs.htm http://www.sequoiaministriesinternational.org/about-us/learn-more-about-giant-sequoias http://www.parks.ca.gov/?page_id=1151 http://www.na.fs.fed.us/pubs/silvics_manual/Volume_1/sequoiadendron/giganteum.htm http://www.parks.ca.gov/?page_id=1151 https://en.wikipedia.org/wiki/Sequoiadendron_giganteum http://www.sequoiaministriesinternational.org/about-us/learn-more-about-giant-sequoias http://www.sequoiaministriesinternational.org/about-us/learn-more-about-giant-sequoias http://www.giant-sequoia.com/faqs/giant-sequoia-landscape-questions/
giant sequoia growth per year