Weeping willows are one of the most popular varieties of willow for use in ornamental landscaping, according to the University of Minnesota Extension. The tree, which is hearty to Zone 3b, has a short trunk and drooping, pliant branches. Although the tree can grow as tall as 50 feet, the branches will break easily in high winds. Willows may be propagated through cuttings. A willow roots so easily from a cutting that new trees springs up from branches that were broken from a parent tree by wind and fell to the ground.
Select a branch on a healthy weeping willow tree. The branch should have no signs of disease and should be at least as thick as a pencil.
Saturate a cloth with bleach.
Swipe pruning shears with the bleach-saturated cloth. Also do this between taking willow cuttings to prevent the spread of disease.
Snip through the selected branch. To do this, use the pruning shears to cut straight across the branch's grain at a point 12 inches from the branch's tip, near where a leaf emerges (the leaf node).
Place the cut end of your willow branch into a sandwich bag along with 1 tbsp. of water to prevent the cutting from drying out.
Mix a rooting mix with 1 part peat moss and 1 part sand in a 6-inch container.
Water the container until the rooting mix is as wet as a wrung-out sponge.
Prepare the willow branch for planting. Strip the lower 2/3 of the willow branch of its leaves. Dip the end of the branch in rooting hormone, and insert it 2/3 of the way into the rooting mix.
Cover the container with a freezer bag, and place it into a sunny windowsill out of direct sunlight.
Check the container daily and water when the rooting mix appears to have dried. The soil should remain as damp as a wrung-out sponge.
Remove the freezer bag when the willow cutting produces roots.