Ginkgo Tree

Select a planting site with full sun and well-drained soil. Ginkgo trees are exceptionally adaptable, tolerating a wide range of soil types including clay, sandy, and compacted urban soil with a pH from 5.0 to 8.0. Space trees at least 35 feet from structures and other large trees to accommodate their eventual broad canopy. Plant balled-and-burlapped or container-grown specimens in spring or early fall, setting the root flare level with the surrounding grade.

Water newly planted ginkgos deeply once a week during the first two growing seasons to establish a strong root system. Apply a 3-inch layer of organic mulch around the base, keeping it 6 inches from the trunk. Ginkgos are slow to establish and may appear to do little in the first few years while building root mass underground. Once established, they are remarkably drought-tolerant and require virtually no supplemental irrigation.

Pruning needs are minimal. Remove crossing or rubbing branches and maintain a strong central leader in the first decade. Ginkgos have few if any pest or disease problems and rarely need spraying. Always plant male cultivars such as Autumn Gold or Princeton Sentry to avoid the malodorous fruit produced by female trees. Ginkgos are among the most pollution-tolerant trees known and perform superbly as urban street and park trees.

Ginkgo biloba, commonly known as the maidenhair tree, is a botanical marvel often called a living fossil. Its lineage stretches back approximately 270 million years to the Permian period, and leaf fossils nearly identical to modern ginkgo leaves have been found in rocks dating to the early Jurassic, over 200 million years ago. During the Mesozoic era, diverse species of Ginkgoales were widespread across the Northern Hemisphere, but the order gradually declined, and Ginkgo biloba is the last surviving member of its entire division, Ginkgophyta.

The species is native to China, where it was long believed to be extinct in the wild until small natural populations were discovered in the Tianmu Mountain region of Zhejiang province and in parts of Guizhou province. For centuries, ginkgo trees were cultivated and preserved by Buddhist monks at temple grounds throughout China, Korea, and Japan, which likely saved the species from complete extinction during periods of climate change and habitat loss.

Ginkgo was introduced to Europe in the early 18th century, with the first recorded European specimen planted at the Utrecht Botanic Garden in the Netherlands around 1730. The German physician and botanist Engelbert Kaempfer was the first Western scientist to describe the tree after encountering it in Japan in the 1690s. Carl Linnaeus formally described it as Ginkgo biloba in 1771. The tree quickly became popular as an ornamental specimen across Europe and North America due to its graceful form, spectacular autumn color, and extraordinary tolerance of urban conditions including compacted soils, restricted root space, road salt, and air pollution. Today ginkgo is one of the most widely planted urban street trees in temperate regions worldwide, valued for its hardiness and longevity.

Ginkgo trees are among the most soil-tolerant trees available, growing in clay, sand, loam, and even compacted urban soil. They prefer a slightly acidic to neutral pH of 5.5 to 7.5 but tolerate alkaline conditions well. Fertilize young trees in early spring with a balanced slow-release fertilizer for the first three to five years. Established ginkgos rarely need supplemental fertilization. Avoid high-nitrogen fertilizers that promote excessive soft growth at the expense of root development and structural wood.

Female ginkgo trees produce fleshy, apricot-like seeds in autumn that emit a strong odor when the outer coating decays. If you have a female tree and wish to harvest the edible inner nuts, collect fallen seeds wearing gloves to avoid skin irritation from butyric acid in the flesh. Remove the outer pulp by soaking seeds in water for several days, then wash and dry the hard inner shells. Crack shells to reveal the pale green kernel inside, which must be cooked before eating as raw ginkgo nuts contain mild toxins.

After cleaning and drying, ginkgo nuts can be stored in their shells in a cool, dry place for several weeks. For longer storage, shell the nuts and freeze the kernels in airtight containers for up to six months. Roasted ginkgo nuts can be kept in sealed jars at room temperature for one to two weeks. In Asian culinary traditions, ginkgo nuts are sometimes preserved in brine or vacuum-sealed after blanching to extend their shelf life through the winter months.

Ginkgo nuts are a traditional ingredient in East Asian cuisine, particularly in Chinese, Japanese, and Korean cooking. The cooked kernels have a mild, slightly sweet flavor with a starchy texture similar to chestnuts. They are commonly added to congee, chawanmushi (savory egg custard), stir-fries, and hotpot dishes. In Japanese cooking they appear in autumn dishes and festive New Year cuisine. Ginkgo nuts must always be cooked before eating and should be consumed in moderation, as large quantities can cause digestive discomfort.