Blackberries are vining plants. You can tie the canes into that trellis. You could go on over to the Fruit and Orchards Forum for advice on care and pruning. Is that one a cultivate variety or just a wild bramble?

Here is a link that might be useful: Fruit and Orchards Forum

Not really sure what type it reay is
It's from Home Depot
Was in a box

Planted it years ago..

Check out the lecture on Blackberries by master horticulturist, Alan Chadwick, here:

Alan Chadwick Lecture Index

(See the latter part of Lecture 17)

Here is a link that might be useful: Alan Chadwick