Wisteria can be layered in spring. Pin a low-growing shoot under the soil, make sure it stays moist, and it should root after a while. would not delay if I were going to try this this year. In late winter you can take tip cuttings and root them in water.

English Holly, at least in Oregon, is on the invasive plant list. I think it is in Washington, too. It would be a kindness not to propagate it.

I agree, the Japanese holly (Ilex crenata, I think) is a terrific plant. When I bought my place in Portland years ago, there was a largish shrub I thought was a boxwood (Buxus), but it kept getting bigger and bigger and bigger. It was several years before I figured out it was an Ilex. Its small, evergreen leaves are terrific for holiday wreath-making, and last long in arrangements. It seems to be without problems and did not mind our summer droughts at all. Good plant. And, to answer the original question, it roots easily from cuttings made in winter.