Ginkgo biloba
(Maidenhair Tree)
CHARACTER: Deciduous; pyramidal or asymmetrical form; open canopy.
SIZE: Large (Height: 35-45'; Spread: 25-40').
GROWTH RATE: Very slow.
FOLIAGE: Light green, fan-shaped leaves, 2-3" across. Fall foliage is golden yellow; tree is bare November-March.
FLOWER/FRUIT/BARK: Male trees: catkin-like pollen sacs, no fruit. Female trees: smelly yellow fleshy fruitlike seeds in summer. Rough, light gray bark.
MONTHLY WATERING NEEDS: In general, 15-20 gallons per week for the first 2 years; 15-20 gallons twice a month for the 3rd year; as needed after 3 years (varies by soil, sun, and wind conditions).
TREE CARE: Low. Early light pruning and staking to establish upright central leader. Water and keep staked and protected during first 5-10 years. Minimal pruning needed once properly trained. Keep lower branches on as long as possible for fastest growth.
TOLERANCES: Drought (once established), sandy soil, salt air, smog, fog, temperature extremes.
SPECIAL CONSIDERATIONS: Prefers sun. Does not tolerate strong wind. Needs good drainage. Needs extra water in hot or windy conditions. Vulnerable to vandalism in early years due to slow growth.
NOTABLE TRAITS: Native to China, very little native habitat left. Most trees sold at nurseries are male clones. Female seed is smelly, but an Asian delicacy when boiled or roasted. Leaves used in Chinese herbal medicine. Can be used in bonsai.
ALTERNATE FORMS: Cultivars: 'Autumn Gold' is spreading, 'Fairmount' and 'Saratoga' are pyramidal.