While the most optimal times to plant the Bios Urn are Spring and early Autumn, the Bios Urn can still be successfully planted in early and mid Winter with a few tips and tricks!
There are two ways to go about doing it: outdoor planting and indoor planting.
Indoor planting ensures the tree receives a moderate temperature, while also ensuring the proper doses of sunlight and water are given. Virtually any tree can be started indoors, in a planter or a fitting container with proper drainage. If you intend to start the Bios Urn indoors, less precautions need to be taken and you can plant as you would normally. The only suggestion is choosing an appropriate tree species, and thinking long term. Will you be replanting the tree in Spring? If so, any tree will do. Will you keep the tree in the container or planter for a long period? Then perhaps it would be wise to choose a fitting tree species which grows well in a container.
For outside planting, there are many things you can do to plant the Bios Urn successfully over Winter. It is recommended to start off with a small seedling or sapling. If you would like to use seeds, then the process of Winter sowing will be necessary.