Christmas trees start out as seeds that come from cones off of mature trees. The seeds are planted at a nursery, and are normally there for three years before the Christmas tree farm even gets the seedlings, or very young trees! The seedlings are planted in neat rows in the ground during the spring, so the roots have plenty of time to establish before it freezes over in the fall or winter. For the next few years, the trees continue to grow. During this time they may be sheared, meaning branches are trimmed. This is done to shape the tree and make it grow in the right direction so a full, beautiful tree will be ready for harvest.