While commercial rooting hormone can be used there are
organic homemade versions that work as well.

To make rooting hormone soak the yellow-tipped shoots of a
weeping willow tree in water. A tea made from the bark of a
willow tree is also effective. When using the shoots or
bark soak them for 24 hours prior to using.

Some people have found that using honey makes an effective
rooting hormone as well.

Leaf cuttings: Any plant with leaves such as African
Violet, Geranium etc. can be propagated with leaf cuttings.
Using a sharp knife cut off a healthy leaf at the point
where it joins the stem. Insert the cut part, called a
petiole, into the rooting hormone. Place the end into a
small container of light potting soil in which you have made
a small hole with a pencil. Making a hole prior to planting
assures that the rooting hormone will not be brushed off the
cutting when you plant it. Perlite, Vermiculite, and/or
water-soaked Sphagnum moss can be added to potting soil to
make the soil light. Make sure the leaf is leaning slightly
so that the new plants will have plenty of light and not be
shaded by the leaf.

Stem cuttings: These are treated just like leaf cuttings
except you cut off a stem with several leaves instead of
just one leaf. Remove the bottom leaves, leaving a few at
the top. Proceed as with the leaf cutting.

In both instances cover the pot with a plastic bag or
inverted glass jar. This will keep moisture from
evaporating and keep the cutting from wilting. Keep in a
warm location with diffused light but out of direct
sunlight. When there is indications of growth after about 3
to 6 weeks, transplant the new emerging plant into a new pot
of potting soil. Continue to keep a humid environment for
about 2 more weeks until active growth begins.