Based on the sorry condition of a few side leaves, this impatien stem cutting is from the original batch that was placed into a plastic bag (which you should not do!) It has one very long root!
This delightful cutting has very nice leaves so it was part of a batch that was planted a little later. It has a good collection of little rootlets growing out, and some flowers have developed at the top. I would normally pinch back any flowers on a cutting, but since there are already a good deal of rootlets to support the cutting with water, I think it will be okay. If you are wary, you can pinch back the biggest blooms so that the plantlet can focus on the roots more before the younger blooms open up.
This cutting only has a few roots, but they will develop readily over the next few weeks. I am confident it will do just fine.
I have moved any cuttings with root growth to a bright but shady location in my garden where they can continue their development without too much drying sun. I have watered them well and expect them to survive without any problems.
Propagating new impatiens was very easy, huh? In two weeks, I have already found cuttings with developing roots. Some of the cuttings, however, have not developed roots yet. I have repotted them and will check on them again in another 2 weeks time as they can take up to 4 weeks to put down roots.
Impatien Propagation - Week Three