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These conditions occur when plants are grown in crowded , damp , or shaded locations , where air circulation is poor , or when cool night temperatures follow warm days . Buds turn brown and decay . Leaf and stem spots may be controlled best by removing old top material in the fall , cutting the stems at ground level and destroying those parts . Completely remove the netting after harvest . The fruit ripens over a 3-week period , and you will have to remove the netting to harvest . " These 4 to 5 scaffold branches should begin about 30 inches from the ground ( 40 inches if turf will be located beneath the branches and need to be mowed ) , should be spaced as equally around the trunk as possible and should be spaced vertically at least 6 inches from one another .