Hertfordshire,
United Kingdom 
I have an established hedge that's too tall. It's Thuja Spicata, dense and lovely and healthy. It's squared off at the top. It's 2.5m tall and I want to reduce it to 2 metres. Will I ruin it if I cut it straight across the whole length?
1 Feb, 2010
Thuja are one of the conifers that you can cut back into seemily brown or 'dead' wood and they will regrow.
I cant see whay removing .5m (less than 2 foot) would be a problem as the new growth will cover the top quickly.
But if im wrong about removing it in one go then someone please correct me.
If i am then perhaps it can be done over the course of a year...
1 Feb, 2010