Posted: 05/11/2012 at 09:18
We inherited a leylandii hedge which was 12' tall. We have gradually cut it back and it is now an acceptable 6 or 7 ' tall and provides a good windbreak and screen for that part of the garden. We haven't been able to do anything about it's widthe because you have to cut back only as far as green shoots as it doesn't regrow from brown wood.
I would therefore also recommend getting rid of the leylandii altogether and keeping the attractive blue fir if possible. If not, get rid too cos topping it will look bizarre.
In our previous house,we inherited 30' high leylandii which had been planted as a hedge but never trimmed. We cut those down ourselves taking off the tops and then the middles and then removing the branches from the stumps and gradually wiggling and axing them out. It took a while but we ended up with so much more space and light and happy neighbours too.