France 
Late autumn, last year I cut back several lavender to create a hedge. In the spring, no fresh shoots and the bushes look dead. Did I cut them back too much. I live in the Charente Maritime, FRANCE.
10 May, 2010
Previous question
Possibly - you should never cut into old wood on lavender, so if that's what you did, then that might explain their death. They need to be trimmed over a couple of times a year, taking soft growth and the flowerheads off, to keep them in shape. Even so, they usually get pretty leggy and woody after 5 or 6 years, so they're often replaced 5 or 6 yearly.
10 May, 2010