‘Snowball’ hydrangea for Christmas. Photo courtesy Mischler’s Florist and Greenhouses by Connie Oswald Stofko Thanksgiving is this Thursday, and from there we rush headlong into any number of holiday celebrations. Here are four ideas for thoughtful gifts to give gardeners and non-gardeners alike. ‘Snowball’ hydrangea We’re starting off with the ‘Snowball’ hydrangea because it can serve as a festive accent in your home from Thanksgiving through all the winter holidays. This potted plant will last probably a couple months, according…