The most recent issue of the Royal Horticultural Society’s journal The Plantsman (n.s. 18(1): 65, March 2019) contains a letter from a Newton Stewart, Wigtownshire, correspondent who reports that Ljubljana Botanical Garden, in Slovenia, is using fibre from Japanese knotweed (Fallopia japonica) to make paper seed-packets.  Japanese knotweed, which is invasive in Slovenia, ‘growing in profusion along riverbanks’, can be used to make a ‘surprisingly fine paper’.