Growing its densely occurring branches 1 to 2 feet annually, the Golden Globe ginkgo is among the faster growing selections of this ancient, deciduous tree native to China. A male variety that does not produce the malodorous fruits, Golden Globe attains a robust, rounded canopy unlike the typical upright and spreading habit of the wild species. Ensuring success is simple: plant in any fertile, well-draining soil in full sun anywhere in USDA hardiness zones 5 through 8.
Prune away damaged or rubbing branches in late winter before new spring leaves emerge. Make the pruning cuts 1/4 inch above a lower healthy branch junction or the main trunk. Prune young, newly planted trees to ensure a good branch structure, including only one leader branch growing vertically from the trunk tip. Remove problematic branches when they are young and small to diminish problems years later when larger equipment is needed and the tree has developed a massive canopy.
Apply a layer of organic mulch annually each spring to a depth of 3 to 4 inches over the root zone of the Golden Globe ginkgo tree. Extend the mulched area 3 to 4 feet beyond the farthest reaches of the branches, where the most active roots grow in the soil.
Monitor soil moisture levels during extended periods of drought, especially for the first two years after the tree is first planted. Do not irrigate the tree outside of drought conditions. Provide 3 to 4 inches of water every 10 to 14 days across an extended drought, using a garden hose with a slow trickle of water.
Keep autumn leaf litter and mulch 4 to 6 inches from the trunk of the ginkgo tree. Excessive debris can lead to root root issues if air circulation on the flare of the trunk is depleted.