A flowering quince is a beautiful plant that will flower on the wood that was grown in the previous year. Though this plant is fairly easy to grow after it has been propagated, the initial propagation can be tricky if you are inexperienced. There are two common ways of propagating a flowering quince, they are called the layering method and the cuttings method.
The Layering Method
The easiest way to propagate your flowering quince is the layering method. This method will produce a new plant through a piece of the stem, while it is still connected to the original plant. The best time to do this method is in the spring, as it will be able to work on its growing process throughout three seasons.
The first thing you will need to do is find a branch that it as least a year old, fairly thin and very flexible. Bend the branch down to the soil into a pre-dug hole that is 3-5 inches deep and about 12 inches long, making sure that the tip of the branch is pointing toward the original bush. Fill the hole in with composted soil around the branch, while making sure to remove any extra twigs, leaves or blooms that may be on the branch, up to 18 inches from the ground. You will probably need to use sturdy wire every 6 inches from the tip to the point that would mark a foot to keep the twig under the soil.
Find a point 9 inches from the tip and cut a shallow hole into the twig. Brush rooting hormones over the hole, encouraging it to begin root growth.
Make sure to thoroughly water your plant. Cut it away from the mother plant once it has grown its own roots.
The Cuttings Method
This method is more difficult, but can be done at any point of the year. The first thing you will need to do is find a pot that has several holes for draining and fill it with equal portions of both sphagnum and perlite, making sure that the mix is moist.
Take a pencil and poke several holes into the surface where you will be able to place your cuttings. Cut 6 to 8 inches of a branch from the original flowering quince. It is important that the branch is at least a year old and has had everything removed from it except for a 4-5 leaves toward what will be the top of the cutting. Trim the leaves that remain until only 2/3 of each leaf remains. Then, at the tip of each base, make a sliver cut.
Put your cuttings into a solution that is 90 percent water and 10 percent bleach for 1 to 2 minutes. Take the cuttings out and allow them to dry. Then dip the cut end into water followed by a rooting hormone. Once this has been done with each cutting, you may place them into the holes you made in you pot, then cover them with a plastic bag, making sure that it does not touch the cuttings.
Place the pot under fluorescent lights so that the cuttings are about 8 inches from the lights. Keep the lights on for 16 hours a day. If you do not wish to use fluorescent lights, you may place your cuttings by a window, though you may not get the same results. The rooting will take about 6-8 weeks or longer. Make sure that you keep the cuttings moist by watering often.