Hi- have you thought of settling for T. plicata from seed? It sprouts like a weed and grows like mad.

the subject seems to have been covered many times.. well 35 at least ..

check the link

ken

Here is a link that might be useful: link

This sounds like a job that you might have considered saying "NO" to. I'm serious!

Why don't you tell us about your procedures in the past? There are really lots of methods to getting the job done, but plenty of ways to guarantee failure.

Thuja are typically propagated in the fall/early winter when they are fully dormant. That gives you plenty of time to do some research and to get a propagation area established somehow.

You know, in your area, a greenhouse is not an optional piece of fancy equipment when one is tasked with propagating hundreds of woody cuttings. It's too cold where you are to rely on a covered cold frame...something that is done successfully in warmer parts of the country.

Though Thuja will be perfectly happy in a winter environment of 40 to 50 degrees (even colder), they will root faster and at a higher percentage if bottom heat is provided.

I'd suggest that you propagate the cuttings in something very coarse textured and fast draining. The medium that you eventually pot the rooted cuttings in should be a typical bark based nursery mix.

Don't use the one gallon cans for propagation. They will take up an enormous amount of space and medium. Start them out in some small plastic containers that you can pile in a flat for easy moving. (See the attached link for an example of what I mean.)

Anyway, good luck to you and I hope you can find some good information on the internet regarding "Propagation of Thuja". If you need some help finding a few good websites, let me know.

Here is a link that might be useful: {{gwi:1170497}}