If you are propagating from a rose stem, push the stem all the way into the hole until the bottom of the flower head touches the ground. If you are propagating a cutting with leaves, push the stem down far enough that at least five of the leaves are not in the ground. It will look like a tiny plant.
For outdoor plants, water them every other day, because they usually dry too fast. If the leaves are becoming yellow, it’s a sign that you’re over watering them.