November 24, 2014
When do I trim back my boysenberry limbs? They never produced as yet, and they are over 6 ft. long with no berries. What do I do?
Also, is it true to cut a lot of greens off my tomatoes and they might produce? They are very tall and healthy looking but do not grow tomatoes.
November 25, 2014
Yes, I would cut them back some. This article on thornless blackberry pruning is the same as you would treat boysenberries: http://www.wvu.edu/~agexten/hortcult/fruits/prunblkbr.htm
As for the tomatoes, pruning isn't always recommended. If you are having difficulties with fruiting, it could be any number of things, especially if you see lots of foliage growth. This could signal too much nitrogen in the soil. Adding phosphorus, like bone meal, can oftentimes correct this. It could also be weather related.