Digital garden is a collection of non-chronological content: notes, thoughts, data, etc. A digital garden is usually being ‘grown’ by a single person. Another term is ‘personal wiki’
A digital garden is somewhat of a constantly evolving encyclopædia. ‘Garden’, in this case, symbolizes the intertwined roots and leaves and branches of the articles (‘saplings’). As one progresses through life and appends new information to the garden, it ‘grows’.