QuestionsHow to growTrees and Shrubstree 0 Vote Up Vote Down Paul Colligan asked 13 years ago I want to replace two ginkos with two thinish tall trees.Suggestions welcome & when to plant. 1 Answers 0 Vote Up Vote Down Gerry Daly Staff answered 7 years ago Ginkgo can be pruned as a narrow tree, if necessary. Much depends on what sort of tree you want. Thuja ‘Smaragd’ is narrow, also Chamaecyparis ‘Kilmacurragh’ Sciadopitys, the Japanese umbrella pine, is narrow and very elegant.