Thanks, but it's not my idea, layering has been around since long before my time. I prefer to do it in spring/summer, any time they start leafing out again for the year, after when you can see for sure which branches are alive, which have died back. Also, in summer, you'll have some much more flexible new branches that are easier to bend without breaking. Usually do 6-8 per year that way, per mature shrub.
