Northamptonshire,
United Kingdom 
can lavender bushes be cut back in April
20 Apr, 2010
Answers
It's normal to give them a light hair-cut in the autumn to remove the dead flowers, and then a slightly harder prune in spring - but never into old wood, as they don't regenerate. I think you could safely prune them now.
20 Apr, 2010
I did mine about 3 weeks ago and its growing back already
20 Apr, 2010
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Cut back lavender in the autumn immediately after flowering. Don't cut into the hard wood though.
20 Apr, 2010