how many do you need for a hemlock tree. heights range from 6 ft to 12 feet tall
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The amount to used is based on the size of the dripline (measurement from widest branch tip, to branch tip across the diameter of the tree). Spikes should be evenly spaced within the dripline at least 3 feet from each other and no closer than 2 feet from the trunk of the tree. Dripline Diameter Number of Spikes 4 feet 1 6 feet 3 8 feet 4 10 feet 7 12 feet 10 15 feet 16
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