How to Grow and Care for Ginkgo Biloba Trees

Ginkgo biloba, also called maidenhair, is a largebroadleaf,deciduoustree with a sculptural pyramid shape. While it loses its leaves in winter, this ancient tree is classified as aconiferandis dioecious, meaning that some trees are male while others are female. Nativeto China, slow-growing ginkgo biloba trees, broadly speaking, will grow well in USDAplanting zones4 through 9.

The gingko biloba's uniquely fan-shaped leaves start out green but change to golden-yellowin the fall. Before the whole leaf turns golden, there is sometimes a stage during which the leaf is two-toned, with separate bands of gold and green. The common name "maidenhair" was inspired by the fan shape of the leaves, which reminds people of the maidenhair fern (Adiantumspp.). The bark on older specimens of the tree becomes deeply furrowed.

The seeds, which are only present on female trees, and to a lesser extent the leaves, are toxic to humans and pets.

Common Name	Gingko, maidenhair
Botanical Name	Gingko biloba
Family	Ginkgoaceae
Plant Type	Tree
Mature Size	50-80 ft. tall, 30-40 ft. wide
Sun Exposure	Full, partial
Soil Type	Sandy, well-drained
Soil pH	Acidic, neutral, alkaline
Bloom Time	Spring
Flower Color	Green
Hardiness Zones	4-9 (USDA)
Native Area	China
Toxicity	Toxic to humans, toxic to pets.

Gingko Biloba Care

Ginkgo biloba trees are attractive enough to be used asspecimen plantsin your landscaping, particularly because of their golden fall foliage color. Most of the recommended cultivars grow best in full sun in the North (partial sun in the South), have average water needs, and stand up well to pollution and road salt. In fact, as salt-tolerant plants, they are good choices for those who landscape near the ocean.

They are also disease-resistant andtolerate urban pollution.

Light

Plant ginkgo biloba in an area that receives full sun to part shade.

Soil

The ginkgo is not fussy about soil type or most soil conditions and will tolerate both acidic and alkaline soil as well as compacted soil. It prefers well-drained sandy soil or loam with a pH in the 5.0 to 8.0 range. They are more tolerant ofcompacted soilthan many other types of trees.

Water

Water as needed to keep the soil moist, provided the site is well-drained. Moisture is particularly important when the tree is young; it is relatively drought-tolerant at maturity.

Temperature and Humidity

Ginkgo bilobas are commonly grown in urban sites in many regions, proving their tolerance of a wide range of moisture conditions and temperatures. However, they can struggle in hot, dry climates.

Fertilizer

Young ginkgo biloboa trees can benefit from a spring feeding of tree fertilizer. For the amount, follow the product label instructions. Mature trees typically do not need to be fed.

Varieties of Male Ginkgo Biloba Trees

• 'Autumn Gold' (zones 3 to 8) is a popular male cultivar. It grows to 40 to 50 feet tall, with a spread of 25 to 30 feet and has abroadly spreading canopy.
• 'Saratoga' (zones 4 to 8) has a similar size and shape to 'Autumn Gold'. What makes this cultivar different is the V-shape ofits leaves, which strays from the usual fan shape.
• ‘Fastigiata' (zones 3 to 8) is another popular male cultivar and is a good choice if you want a tree that is narrow (column-shaped). It becomes 30 to 50 feet tall but just 10 to 15 feet wide.
• 'Princeton Sentry' (zones 3 to 8) is also columnar but matures somewhat larger, at 40 to 50 feet tall and 20 to 30 feet wide.
• 'Fairmont' (zones 5 to 8) is a tall, skinny tree, reaching at least 50 feet in height but just 15 to 18 feet across.
• 'Pendula' (zones 5 to 8) is a good choice for a small space. It's a slow-growing male cultivar that has a stocky build and reaches just 8 feet tall atmaturity, with a maximum spread of 10 feet. While the cultivar name 'Pendula' usually suggests a weeping form, in this case, the tree is more umbrella-shaped.

Pruning

Many types of ginkgo start out narrow while young but then become quite wide as they age, growing into shade trees. You can slow down this process a little by pruning them while young so as to force them to produce a singleleader. But a much better solution is to select a cultivar known to have a narrow shape.

At the other end of the spectrum, they are also used forJapanese bonsai.

Propagating a Gingko Biloba Tree

Gingko can be propagated from cuttings. Here's how it's done:

1. In May or June, take a 6-inch stem cutting of young wood from a male gingko tree.
2. Fill a 4-inch pot with potting mix and water it thoroughly until the soil is evenly moist. You can use one pot for a couple of cuttings but leave at least 1 inch space between them.
3. Dip the cut ends in rooting hormone. Make a hole in the soil with a pencil or stick for each cutting and insert the cuttings in the holes.
4. Place the pot in an outdoor location in bright, indirect light out of the hot sun. Keep the soil moist at all times but not soggy.
5. Once one of the cuttings has rooted, cut the other one to the soil level (don’t pull it out, or you will disturb the tender new roots).
6. When the roots start to grow out of the drain holes, repot cuttings to larger individual pots and let them grow in pots for a couple of seasons. The stronger the sapling is when transplanted, the better its chance of survival in the landscape.

Growing Gingko from Seed

While it is possible to grow a gingko from seed, the safest way to ensure you are growing a male tree is through cuttings, as described above.

Common Problems with Gingko Biloba Trees

The maletrees are preferred (unless you have allergies), because they are fruitless. Female trees bear a fruit-like product, actually a seed ball. It not only emits a foulodor but also is slippery when it drops down on sidewalks or driveways. The problematic "fruit" is about the size of a cherry tomato.

Female Trees Drop Smelly Fruit

Cleaning up after female Ginkgo biloba trees is a high-maintenance task. Fortunately, all-male cultivars have been created throughgrafting. Buying one of these cultivars gives you a way to experience the beauty of the tree while avoiding the mess.

From: thespruce