I waited about a week for my newly-planted impatiens to adjust to their new surroundings first. They are looking pretty settled now, so I searched for long side shoots to use.
Snip the long shoot off at the base, just below a node (where more leaves can grow from).
Keep your cuttings fresh in water so that they don't wilt while you collect more.
Once you have gathered all your impatien stem cuttings, gather your supplies. You will need some planting trays or small pots, potting soil, clear plastic bags, elastic bands or twist ties, and a small shovel or spoon. If desired, you can use rooting powder, but it is not necessary (I didn't end up using any).
Fill your planting trays with potting soil right to the top.Press down the soil lightly with your small shovel or spoon.
Make a hole with the back of the spoon or a pencil. I left room for two cuttings here, but you can plant more or less.
Take a stem cutting, and pinch off all the lower leaves. Also pinch off any flower buds. You want the plant to focus on growing roots instead of supporting flowers.
Place your cutting into the hole.
Use the back of the spoon or a pencil to push some soil towards the stem so that it is well-buried.
Add more cuttings to your tray until you have used up all your cuttings.
Water generously with low water pressure so that the soil is soaked thoroughly. Try not to splash the soil out of the container or to accidentally uproot your cuttings.
Leave trays to drain well.
Unlike the geraniums, don't put your impatiens into a plastic bag and seal it (to create the mini-greenhouse). I did that this morning, and they now look like this:
Aagghh! They're wilted!!! I think my mistake was putting them into a semi-sunny spot. The makeshift greenhouse heated up and the bags coated with moisture and collapsed onto the plants. It think the impatiens must hate the super wet and hot environment in the bag. So... don't put them into bags.
Luckily, I discovered this after only a few hours. I have now opened up the bags so the plants can breathe freely and it seems like they will recover.
If the impatien cuttings survive, they will be ready to transplant in 2 to 4 weeks.
You can also propagate impatien cuttings by planting them directly into the garden. Just make sure to water well every day so that the cuttings don't dry out. I have been able to successfully propagate most of my impatiens that way.
Impatien Propagation - Week Two
Impatien Propagation - Week Three