Lilac that's never been pruned? How do you even go about working out
which third of the stems need doing. Is it best to take out weedy growth
first then 1/3 rest of stems? Looked it up in books but though they say
in a cavalier manner, that you just pruned after flowering and take out
a third it doesn't help much if you can't see the wood for the trees!
Can't find anything much on the smaller rarer lilac
either.

Any advice would be appreciated.

Janet Tweedy
Dalmatian Telegraph
http://www.lancedal.demon.co.uk