Asked October 7, 2019, 7:12 PM EDT
How should I care for my blackberry bushes? They used to produce well but have not for several years. Do they need to be replaced or can they be helped?
Washtenaw County Michigan blackberries
I need more information than that.
What kind of Blackberries are they? Erect? thorny? trailing? how old is the planting? Blackberries don't like cold winters and we have had 3 really cold winters 2014, 2015 and 2019 recently so yields should be way off in those years.
Do you irrigate? prune? when? do you spray for insects and diseases?
Most of the blackberry production information is from states to our south. Here is one from Oklahoma http://pods.dasnr.okstate.edu/docushare/dsweb/Get/Document-1032/HLA-6239web.pdf
Most of Michigan's commercial production is located in the extreme SW part of the state very close to Lake Michigan. The growers who did not protect their canes in the winters above did not have production in those cold years.