Package of 25 seed of GINKGO BILOBA Ginkgo biloba tree is the national tree of China. Ginkgo has long been cultivated in China; some planted trees at temples are believed to be over 1,500 years old. The first record of Europeans encountering it is in 1690 in Japanese temple gardens, where the tree was seen by the German botanist Engelbert Kaempfer. Because of its status in Buddhism and Confucianism, the Ginkgo is also widely planted in Korea and parts of Japan; in both areas, some naturalization has occurred, with Ginkgo's seeding into natural forests. In some areas, The popular cultivars 'Autumn Gold' is a clone of a male plant. Ginkgos adapt well to the urban environment, tolerating pollution and confined soil spaces. They rarely suffer disease problems, even in urban conditions, and are attacked by few insects. For this reason, and for their general beauty, ginkgo's are excellent urban and shade trees, and are widely planted along many streets. Ginkgos are also popular subjects for growing as penjing and bonsai; they can be kept artificially small and tended over centuries. Furthermore, the trees are easy to propagate from seed. Extreme examples of the Ginkgo's tenacity may be seen in Hiroshima, Japan, where six trees growing between 1-2 km from the 1945 atom bomb explosion were among the few living things in the area to survive the blast (photos and details). While almost all other plants (and animals) in the area were destroyed, the ginkgos, though charred, survived and were soon healthy again. The trees are alive to this day. The ginkgo leaf is the symbol of the Urasenke school of Japanese tea ceremony. The tree is the national tree of China.