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If you notice any unwanted growth around the base of your tree, cut off the stems or leaves. Cleaning up around the base of your tree helps preserve the tree-like shape. To make a circle, trim the top of the tree so the sides are smooth and round. Then, make small cuts around the top in a circular shape to give your tree its form. Create a smooth, even shape so your tree has a full, blossoming top. To make an oval, keep the top slightly more pointed to create an elongated shape. Trim the sides so they are smooth and round, and then leave a bit more on the top and bottom to create an oval-like appearance. Your shape does not have to be completely perfect. As your roses grow, they will fill in the shape to create a natural appearance. To create your shape, take off about one-third of the total length of your canes. Leave 1-3 bud eyes on the cane when you make your cuts. This way, your tree rose has an attractive, compact shape so it can grow gorgeous flowers. A bud eye is a small bump where a leaf meets the stem, and this is where new flowers start from.

Summary:
Remove any stems or leaves from the bottom of your tree. Cut your stems into a circular shape for a neatly manicured look. Go with an oval shape for a natural, tree-like look. Shorten all your canes to 3–4 in (7.6–10.2 cm) to create your shape.