Plants are non-denominational, offering-up their enhancement services for celebrations and ceremonies of all religions without discrimination. Different countries use different plants of course, having developed their own stories of how they came to be tradition. To get an idea of what plants are considered seasonal in the UK Christian calendar at this time of year, you only need to look at tree decorations. While it does seem slightly irrational botanically to hang a plastic cone back on a cone producing tree or an acorn for that matter, you have to remember it’s Christmas and all reason goes out the window in favour of festive fun. Readily available species in order of images below are: Conifer (eg Pinus sp.), Christmas Rose (Helleborus sp.) Mistletoe (Viscum album), Holly (Ilex aquifolium), Ginkgo (Ginkgo biloba), Orange (Citrus × sinensis), Poinsettia (Euphorbia pulcherrima), Apple (Malus domestica), Oak (Quercus sp.), Pear (Pyrus communis), Olive (Olea europaea).