By Rogger
Norfolk,
United Kingdom 
I have two plum trees, one a black variety and a Victoria. Both produced very little fruit last year and had grown very tall, about 25ft ( Ignorance on my part about pruning! ). I kept getting stabbed by branches every time I cut the grass, so I have just taken the chain saw to both and cut them down to about 6-7ft. Do you think I have killed them? If not, how many years before they will bear fruit again?
11 Mar, 2016
Answers
Thanks for the response. Yes, it was a moment of frustration, but as you say, what is done, is now done! I shall just wait and see. Not very good at pruning fruit trees!!
14 Mar, 2016
Its not a job I like at all myself...!
14 Mar, 2016
Previous question
The biggest risk is they'll succumb to silver leaf disease - the least risky time to prune young plums is late spring, and for mature trees, midsummer. Still, what's done is done, and I'm afraid you'll just have to wait and see what happens next - its impossible to predict whether they'll survive healthily, and when they'll fruit again. You may find they're just fine, over time ...
11 Mar, 2016