I wouldn't worry about that blackberry. It'll do just fine . . . until one day it takes over your entire world and leaves you wondering how to eradicate it.
Water, mulch, go out there at night and
pee around the base . . . and it'll soon go crazy with growth.
"The rule of no realm is mine. But all worthy things that are in peril as the world now stands, these are my care. And for my part, I shall not wholly fail in my task if anything that passes through this night can still grow fairer or bear fruit and flower again in days to come. For I too am a steward. Did you not know?" Gandolf