If you haven't been pruning your Laburnum in previous years, you can only really cut out the dead wood now. My RHS book gives advice on how to train young trees in their first to fourth years. It says that any pruning should be done in late summer to before mid-winter to avoid the sap bleeding. It also warns aginst renovation pruning into living wood "as this will breach the tree's natural defences" sorry, but I am quoting a reputable source of information!
20 Aug, 2008
If you haven't been pruning your Laburnum in previous years, you can only really cut out the dead wood now. My RHS book gives advice on how to train young trees in their first to fourth years. It says that any pruning should be done in late summer to before mid-winter to avoid the sap bleeding. It also warns aginst renovation pruning into living wood "as this will breach the tree's natural defences" sorry, but I am quoting a reputable source of information!
20 Aug, 2008