Tammisaari lives and works in Helsinki. Tammisaari shows nature’s and psyche’s macro-level details to magnified scales, capturing minutiae in dynamic geometrical brushstrokes. The rough surface texture in Tammisaari’s paintings mostly consist of multiple overlapping images and layers of paint. Varied in visual expression, the earthy palette and abstract forms open for poetic and playful interpretations while building on a modernistic tradition. Tammisaari is triggered by an intuitive flow and reason.   

 In 2013, the political scientist and author Jane Bennett wrote the essay "Vegetal life and onto Sympathy”. Bennett is contemplating how plants and plant life forms might make us rethink the notion of sympathy. She talks about how “the vegetality of humans and the vegetality of plants can somehow communicate”; how we can maybe learn from the plant within ourselves.

In Bennet's interpretation there is no difference between man and what is around man. It is, in other words, the same substance, same matter, same materialism. Man is not exceptional. Everything has vitality.