I don't know if they are wild or not, but last summer, we discovered we've moved into blackberry heaven. Out back of our biggest barn is a huge line of blackberry bushes all along the back wall. Last year I picked several quarts, ate some and made some into blackberry jam (came out real thick like pate, but whatever, it was good). The only thing about them is, some of them aren't very sweet, and they don't get too much bigger than the wild blackberries, so I was wondering what I might do to improve them- fertilizer, pruning, etc... We don't water them, because there are too damn many of them (that and my cheap-ass stepdad won't fix the pipe for the hose), but if I could clip them or throw some stuff on them once or twice, that would be okay. Any advice for a novice would be nice.