Free plants! A wild garden is a mixture of accident and design. Given the chance plants sometimes appear of their own choosing, costing nothing. At the front of the house the steps down to the basement have been colonised by Campanula poscharskyana. It has lush green leaves all year round and is smothered in violet blue flowers in May/June- yet it is routinely treated as a weed.
 It was probably introduced to the UK with rockeries in mind but it thinks it is scrambling around the mountains of the Balkans where it originates. It spreads rapidly and has escaped from genteel gardens making itself at home in the brick, stone and concrete of London streets. I think it should be considered a bona fide urban wildflower just as the wildflowers of yesteryear flourished in the fields.
 Bumblebees go mad for it and bustle all over C. poscharskyana from dawn till dusk. It grows outside my bedroom window and their busy buzzing is the first thing I hear when I wake up.