Erect blackberry plants can be planted as close as 3 feet apart, but some of the longer, trailing varieties should be set 6 to 8 feet apart. The optimum planting season is in early spring. To plant, dig a hole wide enough and deep enough to take the roots. The crown should be 1 to 2 inches below the soil line. Unchecked blackberries can grow into a problem, but they can also become a successful part of wildlife management.
Blackberries form a shelter for small animals and birds, such as quail.
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