I am a novice so bare withme on these issues. I grow flowers and plants at the of my home in pots and containers. Unfortunately I have noticed leaves turning brown at the edges , I have been looking on other sites for answers but am not sure if I am identifying the correct issue. Some of the things noted are leaf scorch,deficiency I would be grateful if anyone could help as I don't want to lose these blackberry bushes. By the way I live in n.ireland maybe the weather an issue.