Hmmm, the RHS method says 'cut' their cuttings, but I tend towards propagating lavender using 'heel cuttings'. Pull the cuttings off the main plant so that a 'heel' of stem is left.

Take lavender cuttings | How to | Projects | BBC Gardeners' World

I don't bother with the hormone powder, although I read somewhere that seaweed solution can also be simarly used to dip into?

__________________
Manda.

"Wouldn't it be nice
For maybe an hour
To not have a care."