Christmas tree farms around Illinois, Indiana and Wisconsin are listed. Additional Christmas tree links for kids are available. Some useful hints for selecting a tree include doing a freshness test by gently pulling a branch between the thumb and forefinger. A fresh tree should have very few needles come off. Useful tips for caring for a tree includes making straight cut across the base of the trunk before setting it up, and keeping sufficient water for the tree.
More detailed information is available.
Christmas Tree Production provides a brief introduction of how a Christmas tree is produced. The site describes the process from seedling, early growth stages, late growth stages to harvest. It also raises issues concerning labor laws and improvement in genetics. This site is developed by Carolina Fraser Fir Company with an emphasis on Fraser fir Christmas trees. The site contains information about 16 popular Christmas tree types with description, growing range, propagation and uses.