Adding siblings on your 5-generation family tree siblings template should not be a hassle. If you have several siblings to add, you need to consider the size or space in your 5 generation family tree template to accommodates all the relevant information about your siblings, including dates of birth and full names. Be sure to check whether the chosen template accommodates adopted or half-siblings.
Most readily available family tree templates require you to first link a sibling with at least one parent to prove the kinship. It means that you can only add siblings up to four generations in a 5-generation family tree siblings template.