propagating tall garden phlox?

I cut back a phlox and have tons of new growth (which will freeze in a couple of months.)
How can I most effectively root these new shoots?

Yes, cuttings are an excellent way to start Phlox.

Neil, can you tell me how I take cuttings from garden phlox? Somebody gave me two plants last Fall and I see a lot of plant growth on one but not the other. All I see is the dried stems on the other phlox, but their is a little green fern like green thing growing beside that, but I'm wondering if that was part of another plants attached when she dug the phlox up for me? Do all garden phlox grow about the same time? I think this is supposed to be a light purple color. I've got my eye on Blue Paradise or a hot pink in a mail order catalog but would like to buy locally to save the shipping cost or find somebody locally who wants to divide their garden phlox and is willing to share.

My different varieties emerge at different rates, so the other one may just be slow, but the ferny foliage does sound like a tag a long. Usually by May they're big enough to take cuttings here, and its a good time to pinch them back too. I don't usually pinch all the stems, just those on the outside of the clump. That way the middle stems get taller, with fuller heads, and those on the outside are shorter and bushier. The cuttings root easily in sand, vermiculite, or just potting soil. I like to use rooting hormone, and usually stick cuttings in a 6" pot. I think tenting is a good idea, and have found plastic grocery bags great for this use, just plop the whole pot into the bag and loosely tie the top. Cuttings that are about 3-4" long work well.