In some families, there is a long tradition of planting a tree at the birth or adoption of a child. If not, why not start one? That way, 15, 30 or 60 years later, the child, now an adult, will always have “their” tree.
But what tree should you plant?
Where it will grow (hardiness zones 3 to 8), the ginkgo (Ginkgo biloba) is perhaps the best choice. Its growth is slow but steady, it thrives in almost any well-drained soil, it is resistant to insects and diseases and, especially, it lives a long, long time: 1000 years or even more. So even if the newborn lives to be over 100 years old, their commemorative tree will always be there to remind them of their family.