Climbing roses aren't natural ramblers like vines. They lack suckers or tendrils and need to be secured to a support system. Because their canes are more pliable than those of a bush rose, bending them into the direction you want them to grow is easy. Find a healthy climbing rose from which to take a cutting and soon you will have your own rose to train. Take your cutting in the spring.
Fill the planting pot to within 1/2 inch of the rim with equal parts of sand and peat moss. Water the planting medium until it is consistently moist. You may need to stir it and wet it several times. Allow the water to drain from the bottom of the pot before planting the start. Create a planting hole with your finger or a stick.
Cut a 6-inch piece of stem from this year's growth. The cutting should be from the tip of the stem, not the area nearest the main cane, and cut at a 45-degree angle. Make the cut just below a leaf.
Remove all the leaves from the lower 1/3 of the cutting. Dip the angled end of the cutting 1 inch into the rooting hormone.
Stick the cutting into the planting hole until at least two leaf nodes (area on the stem where the leaves joined it) are buried and pack the soil around it.
Place the sticks or pencils into the soil around the edges of the pot, extending higher than the cutting. Place the potted cutting into the plastic bag and adjust it so that the sticks are holding the plastic away from the cutting. Your climbing rose start should have roots within eight weeks. Remove the bag.