So far I've gotten 3 1/2 jars of blackcurrant jam from my plant. And it looks like it's not even finished producing.
I've only seen blackberries sold in the shops in quantities of 1 cup, at $6 per cup. To make vison's Blackberry Jam, I'd have to spend $36. I may have to forego this year unless I see more reasonable prices. Then again, once my back garden is done and my blackberry bush becomes established, I may never have to buy blackberries again. Bliss!
Speaking of which, on Thursday the contractors told me they were about half-way done.